Manual.rst

.. ==================================================
.. Header hierarchy
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.. --------------------------------------------used to the update the records specified ------
.. Best Practice T3 reST: https://docs.typo3.org/m/typo3/docs-how-to-document/master/en-us/WritingReST/CheatSheet.html
..             Reference: https://docs.typo3.org/m/typo3/docs-how-to-document/master/en-us/WritingReST/Index.html
.. Italic *italic*
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.. Definition:
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.. -*- coding: utf-8 -*- with BOM.


.. include:: Includes.txt

.. _general:

General
=======

* Project homepage: https://qfq.io
* Latest releases: https://qfq.io/download
* Development: https://git.math.uzh.ch/typo3/qfq
* Chat: https://hello.math.uzh.ch > QFQ


.. _installation:

Installation
============

The following features are only tested / supported on linux hosts:

* General: QFQ is coded to run on Linux hosts, preferable on Debian derivates like Ubuntu.
* HTML to PDF conversion - command `wkhtmltopdf`.
* Concatenation of PDF files - command `pdfunite`.
* PDF decrypt (used for merge with pdfunite) - command `qpdf`.
* PDF decrypt (used for merge with pdfunite) - command `gs` - in case `qpdf` is not successful.
* Mime type detection for uploads - command `file`.


.. _`preparation`:

Preparation
-----------

Report & Form
^^^^^^^^^^^^^

To normalize UTF8 input, *php-intl* package is needed by

* normalizer::normalize()

For the `download`_ function, the programs `pdfunite`, `qpdf`, `gs` and `file` are necessary to concatenate PDF files.

Preparation for Ubuntu::

  sudo apt install php-intl
  sudo apt install poppler-utils libxrender1 file pdf2svg pdfunite qpdf ghostscript # for file upload, PDF and 'HTML to PDF' (wkhtmltopdf), PDF split
  sudo apt install inkscape imagemagick            # to render thumbnails

.. _wkhtml:

wkhtmltopdf
^^^^^^^^^^^

`wkhtmltopdf <http://wkhtmltopdf.org/>`_ will be used by QFQ to offer 'website print' and 'HTML to PDF' conversion.
The program is not included in QFQ and has to be manually installed.

* The Ubuntu package `wkhtmltopdf` needs a running Xserver - this does not work on a headless webserver.

  * Best is to install the QT version from the named website above.
  * In case of trouble with wkhtmltopdf, also install 'libxrender1'.
  * The current version 0.12.4 might have trouble with https connections. Version 0.12.5-dev (github master branch)
    seems more reliable. Please contact the QFQ authors if you need a compiled Ubuntu version of wkhtmltopdf.

In configuration_ specify::

    config.cmdWkhtmltopdf:  /opt/wkhtmltox/bin/wkhtmltopdf
    config.baseUrl: http://www.example.com/

If wkhtml has been compiled with dedicated libraries (not part of LD_LIBRARY_PATH), specify the LD_LIBRARY_PATH together
with the path-filename::

    config.cmdWkhtmltopdf: LD_LIBRARY_PATH=/opt/wkhtmltox/lib /opt/wkhtmltox/bin/wkhtmltopdf

.. important::

    To access FE_GROUP protected pages or content, it's necessary to disable the `[FE][lockIP]` check! `wkhtml`
    will access the Typo3 page locally (localhost) and that IP address is different from the client (=user) IP.

Configure via Typo3 Installtool `All configuration > $TYPO3_CONF_VARS['FE']`: ::

   [FE][lockIP] = 0

.. warning::

    ``[FE][lockIP] = 0`` disables an important anti-'session hijacking' protection. The security level of the whole installation
    will be *lowered*! Again, this is only needed if `wkhtml` needs access to FE_GROUP protected pages & content. As an
    alternative to lower the security level, create a separated page subtree which is only accessible (configured via
    Typoscript) from specific IPs **or** if a FE-User is logged in.

If there are problems with converting/downloading FE_GROUP protected pages, check configuration_ `showDebugInfo = download` to debug.

.. note::

    Converting HTML to PDF gives no error message but RC=-1? Check carefully all includes of CSS, JS, images
    and so on! Typically some of them fails to load and wkhtml stops running! Verify the correct loading of all elements
    by calling the site via a regular browser and bypassing any browser cache (Ctrl F5).

Checklist wkhtml problems
"""""""""""""""""""""""""

* `config.baseUrl` is configured and correct. The baseUrl has to be the same protocol as the website (http or https).
* To track down problems:

  * In configuration_ set `debug.showDebugInfo=auto,download`.
  * Do the download.
  * Check QFQ_LOG_ for any output.
  * Grab the URL given in the QFQ_LOG_, open a browser in private mode (no existing browser session) and open the URL.
  * Check the `--cookie-jar '/tmp/qfq.cookie....'` file for the cookie.
  * Call wkhtml manually on the webserver, with the same options as given in the QFQ_LOG_.

HTML to PDF conversion
""""""""""""""""""""""

`wkhtmltopdf` converts a website (local or remote) to a (multi)-page PDF file. It's mainly used in `download`_.

Print
"""""

Different browser prints the same page in different variations. To prevent this, QFQ implements a small PHP wrapper
`print.php` with uses `wkhtmltopdf` to convert HTML to PDF.

Provide a `print this page`-link (replace 'current pageId' )::

  <a href="typo3conf/ext/qfq/Classes/Api/print.php?id={current pageId}">Print this page</a>

Any parameter specified after `print.php` will be delivered to `wkhtmltopdf` as part of the URL.

Typoscript code to implement a print link on every page::

  10 = TEXT
  10 {
    wrap = <a href="typo3conf/ext/qfq/Classes/Api/print.php?id=|&type=99"><span class="glyphicon glyphicon-print" aria-hidden="true"></span> Printview</a>
    data = page:uid
  }

Send Email
^^^^^^^^^^

QFQ sends mail via `sendEmail` http://caspian.dotconf.net/menu/Software/SendEmail/ - a small perl script without a central
configuration.

By default, `sendEmail` uses the local installed MTA, writes a logfile to `fileadmin/protected/log/mail.log` and handles attachments
via commandline options. A basic HTML email support is implemented.

The latest version is v1.56, which has at least one bug. That one is patched in the QFQ internal version v1.56p1 (see
QFQ GIT sources in directory 'patches/sendEmail.patch').

Nevertheless, on latest system the TLS support is broken - please check sendEmailProblem_.

The Typo3 sendmail eco-system is not used at all by QFQ.

Thumbnail
^^^^^^^^^

Thumbnails will be rendered via ImageMagick (https://www.imagemagick.org/) 'convert' and 'inkscape' (https://inkscape.org).
'inkscape' is only used for '.svg' files.

The Typo3 graphic eco-system is not used at all by QFQ.

Usage: `column-thumbnail`_.

Setup
-----

* Install the extension via the Extension Manager.

  * If you install the extension by manual download/upload and get an error message
    "can't activate extension": rename the downloaded zip file to `qfq.zip` or `qfq_<version>.zip` (e.g. version: 18.12.0).

  * If the Extension Manager stops after importing: check your memory limit in php.ini.

* Copy/rename the file *<site path>/typo3conf/ext/qfq/config-example.qfq.php* to *<site path>/typo3conf/config.qfq.php*.
  Configure the necessary settings `configuration`_
  The configuration file is outside of the extension directory, to not loose it during de-install and install again.
* When the QFQ Extension is called the first time on the Typo3 frontend, the file *<ext_dir>/Classes/Sql/formEditor.sql* will
  played and fills the database with the *Form editor* records. This also happens automatically after each update of QFQ.
* Configure Typoscript to include Bootstrap, jQuery, QFQ javascript and CSS files.

.. _setup-css-js:

Setup CSS & JS
^^^^^^^^^^^^^^
::

    page.meta {
        X-UA-Compatible = IE=edge
        X-UA-Compatible.attribute = http-equiv
        viewport=width=device-width, initial-scale=1
    }

    page.includeCSS {
        file01 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap.min.css
        file02 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap-theme.min.css
        file03 = typo3conf/ext/qfq/Resources/Public/Css/jqx.base.css
        file04 = typo3conf/ext/qfq/Resources/Public/Css/jqx.bootstrap.css
        file05 = typo3conf/ext/qfq/Resources/Public/Css/qfq-bs.css
        file06 = typo3conf/ext/qfq/Resources/Public/Css/tablesorter-bootstrap.css
        file07 = typo3conf/ext/qfq/Resources/Public/Css/font-awesome.min.css

        # Only needed in case FullCalendar is used
        file08 = typo3conf/ext/qfq/Resources/Public/Css/fullcalendar.min.css
    }

    page.includeJS {
        file01 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.min.js
        file02 = typo3conf/ext/qfq/Resources/Public/JavaScript/bootstrap.min.js
        file03 = typo3conf/ext/qfq/Resources/Public/JavaScript/validator.min.js
        file04 = typo3conf/ext/qfq/Resources/Public/JavaScript/jqx-all.js
        file05 = typo3conf/ext/qfq/Resources/Public/JavaScript/globalize.js
        file06 = typo3conf/ext/qfq/Resources/Public/JavaScript/tinymce.min.js
        file07 = typo3conf/ext/qfq/Resources/Public/JavaScript/EventEmitter.min.js
        file08 = typo3conf/ext/qfq/Resources/Public/JavaScript/typeahead.bundle.min.js
        file09 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.min.js
        file10 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.tablesorter.combined.min.js
        file11 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.tablesorter.pager.min.js
        file12 = typo3conf/ext/qfq/Resources/Public/JavaScript/widget-columnSelector.min.js

        # Only needed in case FormElement 'annotate' is used.
        file13 = typo3conf/ext/qfq/Resources/Public/JavaScript/fabric.min.js
        file14 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.fabric.min.js

        # Only needed in case FullCalendar is used
        file15 = typo3conf/ext/qfq/Resources/Public/JavaScript/moment.min.js
        file16 = typo3conf/ext/qfq/Resources/Public/JavaScript/fullcalendar.min.js
    }


.. _form-editor:

FormEditor
----------

Setup a *report* to manage all *forms*:

* Create a Typo3 page.
* Set the 'URL Alias' to `form` (recommended) or the individual defined value in parameter `editFormPage` (configuration_).
* Insert a content record of type *qfq*.
* In the bodytext insert the following code::

    # If there is a form given by SIP: show
    form={{form:SE}}

    # In case indexQfq != indexData, set dbIndex=indexQfq.
    dbIndex = {{indexQfq:Y}}

    10 {
        # Table header.
        sql = SELECT CONCAT('p:{{pageAlias:T}}&form=form|A:data-reference=newForm') as _pagen, '#', 'Name', 'Title', 'Table', ''
        head = {{'b|p:id={{pageAlias:T}}&form=copyFormFromExt|t:Copy form from ExtForm|A:data-reference=copyForm' AS _link}}
               <table class="table table-hover qfq-table-50 tablesorter tablesorter-filter" id="{{pageAlias:T}}-form">
        tail = </table>
        rbeg = <thead class="qfq-sticky"><tr>
        rend = </tr></thead>
        fbeg = <th>
        fend = </th>

        10 {
            # All forms
            sql = SELECT CONCAT('p:{{pageAlias:T}}&form=form&r=', f.id, '|A:data-reference=editForm', f.name) as _pagee
                         , f.id, QMORE(f.name, 50), f.title AS '_striptags', f.tableName
                         , CONCAT('U:form=form&r=', f.id, '|A:data-reference=deletForm') as _paged
                      FROM Form AS f
                      ORDER BY f.name
            rbeg = <tr>
            rend = </tr>
            fbeg = <td>
            fend = </td>
        }
    }

To keep the overview about all forms, it's useful to know which form has been used, how often, on which
page and when. Find these information included in the `form-editor-usage`_ report.


.. _install-checklist:

Installation: Check List
------------------------

* Protect the directory `<T3 installation>/fileadmin/protected` in Apache against direct file access.

  * `<T3 installation>/fileadmin/protected/` should be used for confidential (uploaded / generated) data.
  * `<T3 installation>/fileadmin/protected/log/...` is the default place for QFQ log files.

* Protect the directory `<T3 installation>/fileadmin` in Apache to not execute PHP Scripts - malicious uploads won't be executed.
* Setup a log rotation rule for `sqlLog`.
* Check that `sqlLogMode` is set to `modify` on productive sites. With `none` you have no chance to find out who changed
  which data and `all` really logs a mass of data.

.. _configuration:

Configuration
-------------

.. _config-qfq-php:

config.qfq.php
^^^^^^^^^^^^^^

+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Keyword                       | Example                                               | Description                                                                |
+===============================+=======================================================+============================================================================+
| DB_<n>_USER                   | DB_1_USER=qfqUser                                     | Credentials configured in MySQL                                            |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_PASSWORD               | DB_1_PASSWORD=1234567890                              | Credentials configured in MySQL                                            |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_SERVER                 | DB_1_SERVER=localhost                                 | Hostname of MySQL Server                                                   |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_NAME                   | DB_1_NAME=qfq_db                                      | Database name                                                              |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| LDAP_1_RDN                    | LDAP_1_RDN='ou=Admin,ou=example,dc=com'               | Credentials for non-anonymous LDAP access. Only one set supported.         |
| LDAP_1_PASSWORD               | LDAP_1_PASSWORD='mySecurePassword'                    |                                                                            |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+


Example: *typo3conf/config.qfq.php*: ::

    <?php

    // QFQ configuration
    //
    // Save this file as: <site path>/typo3conf/config.qfq.php

    return [
        'DB_1_USER' => '<DBUSER>',
        'DB_1_SERVER' => '<DBSERVER>',
        'DB_1_PASSWORD' => '<DBPW>',
        'DB_1_NAME' => '<DB>',

        //DB_2_USER => <DBUSER>
        //DB_2_SERVER => <DBSERVER>
        //DB_2_PASSWORD => <DBPW>
        //DB_2_NAME => <DB>

        // DB_n ...
        // ...

        // LDAP_1_RDN => 'ou=Admin,ou=example,dc=com'
        // LDAP_1_PASSWORD => 'mySecurePassword'
    ];

.. _extension-manager-qfq-configuration:

Extension Manager: QFQ Configuration
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Keyword                           | Default / Example                                     | Description                                                                |
+===================================+=======================================================+============================================================================+
| Config                                                                                                                                                                 |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| flagProduction                    | yes                                                   | yes|no: used to differentiate production and development site.             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| render                            | single                                                | both|single: QFQ will show form and/or report. In most cases only one at a |
|                                   |                                                       | time is needed. Options: 'single' (default) or 'both' (legacy). In mode    |
|                                   |                                                       | 'single' prefer 'form' over 'report'.                                      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| maxFileSize                       | 10M                                                   | If empty, take minimum of 'post_max_size' and 'upload_max_filesize'.       |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| baseUrl                           | http://example.com                                    | URL where wkhtmltopdf will fetch the HTML (no parameter, those comes later)|
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| dateFormat                        | yyyy-mm-dd                                            | Possible options: yyyy-mm-dd, dd.mm.yyyy.                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| thumbnailDirSecure                | fileadmin/protected/qfqThumbnail                      | Important: secure directory 'protected' (recursive) against direct access. |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| thumbnailDirPublic                | typo3temp/qfqThumbnail                                | Both thumbnail directories will be created if not existing.                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdInkscape                       | inkscape                                              | If inkscape is not available, specify an empty string.                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdConvert                        | convert                                               | GraphicsMagics 'convert' is recommended.                                   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdWkhtmltopdf                    | /usr/bin/wkhtmltopdf                                  | PathFilename of wkhtmltopdf. Optional variables like LD_LIBRARY_PATH=...   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sendEMailOptions                  | -o tls=yes                                            | General options. Check: http://caspian.dotconf.net/menu/Software/SendEmail |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| documentation                     | http://docs.typo3.org...                              | Link to the online documentation of QFQ. Every QFQ installation also       |
|                                   |                                                       | contains a local copy: typo3conf/ext/qfq/Documentation/html/Manual.html    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Dynamic                                                                                                                                                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| fillStoreSystemBySql1/2/3         | SELECT s.id AS ...                                    | Specific values read from the database to fill the system store during QFQ |
|                                   |                                                       | load. See `fillStoreSystemBySql`_ for a usecase.                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| fillStoreSystemBySqlErrorMsg1/2/3 | No current period found                               | Only define an error message, if QFQ should stop running                   |
|                                   |                                                       | in case of an SQL error or not exact one record.                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Debug                                                                                                                                                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| throwExceptionGeneralError        | auto                                                  | | *yes*: 'general errors' in QFQ (PHP) will throw an exception.            |
|                                   |                                                       | | *auto*: becomes 'yes', if 'flagProduction'!='yes', else 'no'.            |
|                                   |                                                       | | *no*: 'general errors' in QFQ (PHP) will be silently ignored.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formSubmitLogMode                 | all                                                   | | *all*: every form submission will be logged.                             |
|                                   |                                                       | | *none*: no logging.                                                      |
|                                   |                                                       | | See `form-submit-log-page`_ for example QFQ code to display the log.     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| redirectAllMailTo                 | john@doe.com                                          | If set, redirect all QFQ generated mails (Form, Report) to the specified.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sqlLogMode                        | modify                                                | | *all*: every statement will be logged - this might be a lot.             |
|                                   |                                                       | | *modifyAll*: log all statements which might change data, even if 0 rows  |
|                                   |                                                       | |    affected.                                                             |
|                                   |                                                       | | *modify*: log only statements which change data (affected rows > 0).     |
|                                   |                                                       | | *error*: log only DB errors.                                             |
|                                   |                                                       | | *none*: no SQL log at all.                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sqlLogModeAutoCron                | error                                                 | Applies only to AutoCron Jobs. For production 'error' should be fine.      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sqlLog                            | fileadmin/protected/log/sql.log                       | Filename to log SQL commands: relative to <site path> or absolute. If the  |
|                                   |                                                       | directory does not exist, create it.                                       |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| qfqLog                            | fileadmin/protected/log/qfq.log                       | Filename to log general QFQ events:relative to <site path> or absolute.    |
|                                   |                                                       | If the directory does not exist, create it.                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| mailLog                           | fileadmin/protected/log/mail.log                      | Filename to log `sendEmail` commands: relative to <site path> or absolute. |
|                                   |                                                       | If the directory does not exist, create it.                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| showDebugInfo                     | auto                                                  | FE - Possible values: yes|no|auto|download. For 'auto': If a BE User is    |
|                                   |                                                       | logged in, a debug information will be shown on the FE.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Database                                                                                                                                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| init                              | init=SET names utf8; SET sql_mode =                   | Global init for using the database. For 'sql_mode="NO_ENGINE_SUBSTITUTION"'|
|                                   | "NO_ENGINE_SUBSTITUTION"                              | see #7407.                                                                 |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| update                            | auto                                                  | | *auto*: apply DB Updates only if there is a newer version.               |
|                                   |                                                       | | *always*: apply DB Updates always, especially play formEditor.sql every  |
|                                   |                                                       |   time QFQ is called - *not* recommended!                                  |
|                                   |                                                       | | *never*: never apply DB Updates.                                         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| indexData                         | 1                                                     | Optional. Default: 1. Retrieve the current setting via {{dbNameData:Y}}.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| indexQfq                          | 1                                                     | Optional. Default: 1. Retrieve the current setting via {{dbNameQfq:Y}}.    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Security                                                                                                                                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| escapeTypeDefault                 | m                                                     | All variables `{{...}}` get this escape class by default.                  |
|                                   |                                                       | See `variable-escape`_.                                                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityVarsHoneypot              | email,username,password                               | If empty: no check. All named variables will rendered as INPUT elements.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityAttackDelay               | 5                                                     | If an attack is detected, sleep 'x' seconds and exit PHP process.          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityShowMessage               | true                                                  | If an attack is detected, show a message.                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityGetMaxLength              | 50                                                    | GET vars longer than 'x' chars triggers an `attack-recognized`.            |
|                                   |                                                       | `ExceptionMaxLength`_.                                                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityFailedAuthDelay           | 3                                                     | If REST authorization fails, sleep 'x' seconds before answering.           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Form-Config                                                                                                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| recordLockTimeoutSeconds          | 900                                                   | Timeout for record locking. After this time, a record will be replaced.    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sessionTimeoutSeconds             | 1800                                                  | Timeout for FE User session. See sessionTimeoutSeconds_                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| enterAsSubmit                     | enterAsSubmit = 1                                     | 0: off, 1: Pressing *enter* in a form means *save* and *close*.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| editFormPage                      | form                                                  | T3 Pagealias to edit a form.                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataPatternError              | please check pattern error                            | Customizable error message used in validator.js. 'pattern' violation.      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataRequiredError             | missing value                                         | Customizable error message used in validator.js. 'required' fields.        |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataMatchError                | type error                                            | Customizable error message used in validator.js. 'match' retype mismatch.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataError                     | generic error                                         | Customizable error message used in validator.js. 'no specific' given.      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Form-Layout                                                                                                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| labelAlign                        | left                                                  | Label align (left/center/right)/ Default: left. Will be inherited to Form. |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqContainer              | container                                             | | QFQ with own Bootstrap: 'container'.                                     |
|                                   |                                                       | | QFQ already nested in Bootstrap of mainpage: <empty>.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqForm                   | qfq-color-base                                        | Wrap around QFQ 'Form'.                                                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqFormPill               | qfq-color-grey-1                                      | Wrap around title bar for pills: CSS Class, typically a background color.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqFormBody               | qfq-color-grey-2                                      | Wrap around FormElements: CSS Class, typically a background color.         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formBsColumns                     | col-md-12 col-lg-10                                   | The whole form will be wrapped. See `bs-custom-field-width`_               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formBsLabelColumns                | col-md-3 col-lg-3                                     | The column get the width. See `bs-custom-field-width`_                     |
+-----------------------------------+-------------------------------------------------------+                                                                            |
| formBsInputColumns                | col-md-6 col-lg-6                                     |                                                                            |
+-----------------------------------+-------------------------------------------------------+                                                                            |
| formBsNoteColumns                 | col-md-3 col-lg-3                                     |                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoInline             | <img src="info.png">                                  | Image for `extraButtonInfo`_ (inline).                                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoBelow              | <img src="info.png">                                  | Image for `extraButtonInfo`_ (below).                                      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoPosition           | below                                                 | 'auto' (default) or 'below'. See `extraButtonInfo`_.                       |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoClass              | pull-right                                            | '' (default) or 'pull-right'. See `extraButtonInfo`_.                      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Form-Language                                                                                                                                                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formLanguage[ABCD]Id              | E.g.: 1                                               | In Typo3 configured pageLanguage id. The number after the 'L' parameter.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formLanguage[ABCD]Label           | E.G.: english                                         | Label shown in *Form editor*, on the 'basic' tab.                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonText                    |                                                       | Text on the form save button. Typically none.                              |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonTooltip                 | Save                                                  | Tooltip on the form save button.                                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonClass                   | btn btn-default navbar-btn                            | Bootstrap CSS class for save button on top of the form.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| buttonOnChangeClass               | alert-info btn-info                                   | Bootstrap CSS class for save button showing 'data changed'.                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonGlyphIcon               | glyphicon-ok                                          | Icon for the form save button.                                             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonText                   |                                                       | Text on the form close button. Typically none.                             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonTooltip                | close                                                 | Tooltip on the form close button.                                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonClass                  | btn btn-default navbar-btn                            | Bootstrap CSS class for close button on top of the form.                   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonGlyphIcon              | glyphicon-remove                                      | Icon for the form close button.                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonText                  |                                                       | Text on the form delete button. Typically none.                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonTooltip               | delete                                                | Tooltip on the form delete button.                                         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonClass                 | btn btn-default navbar-btn                            | Bootstrap CSS class for delete button on top of the form.                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonGlyphIcon             | glyphicon-trash                                       | Icon for the form delete button.                                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonText                     |                                                       | Text on the form new button. Typically none.                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonTooltip                  | new                                                   | Tooltip on the form new button.                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonClass                    | btn btn-default navbar-btn                            | Bootstrap CSS class for new button on top of the form.                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonGlyphIcon                | glyphicon-plus                                        | Icon for the form new button.                                              |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| showIdInFormTitle                 | 0 (off), 1 (on)                                       | Append at the form title the current record id.                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassColumnId                  | text-muted                                            | A column in a subrecord with the name id|ID|Id gets this class.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+

After parsing the configuration, the following variables will be set automatically in STORE_SYSTEM:

+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| Keyword                       | Description                                                                                                                        |
+===============================+====================================================================================================================================+
| dbNameData                    | Name of the 'data'-database. '{{dbNameData:Y}}                                                                                     |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| dbNameQfq                     | Name of the 'QFQ'-database. '{{dbNameQfq:Y}}                                                                                       |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| dbNameT3                      | Name of the 'T3'-database. '{{dbNameT3:Y}}                                                                                         |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| sitePath                      | Absolute path of the current T3 instance. '{{sitePath:Y}}                                                                          |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| extPath                       | Absolute path of the QFQ extension. '{{extPath:Y}}                                                                                 |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+


.. _`CustomVariables`:

Custom variables
^^^^^^^^^^^^^^^^

Up to 30 custom variables can be defined in `configuration`_.

E.g. to setup a contact address and reuse the information inside your installation do: ::

   custom1: ADMINISTRATIVE_CONTACT = john@doe.com
   custom2: ADMINISTRATIVE_ADDRESS = John Doe, Hollywood Blvd. 1, L.A.
   custom3: ADMINISTRATIVE_NAME = John Doe

 * Somewhere in a `Form` or in `Report`::

      {{ADMINISTRATIVE_CONTACT:Y}}, {{ADMINISTRATIVE_ADDRESS:Y}}, {{ADMINISTRATIVE_NAME}}

It's also possible to configure such variables directly in `config.qfq.php`_.

.. _`fillStoreSystemBySql`:

Fill STORE_SYSTEM by SQL
^^^^^^^^^^^^^^^^^^^^^^^^

A specified SELECT statement in `configuration`_ in variable `fillStoreSystemBySql1` (or `2`,
or `3`) will be fired. The query should have 0 (nothing happens) or 1 row. All columns will be
**added** to the existing STORE_SYSTEM. Existing variables will be overwritten. Be careful not to overwrite system values.

This option is useful to make generic custom values, saved in the database, accessible to all QFQ Report and Forms.
Access such variables via `{{<varname>:Y}}`.

In case QFQ should stop working if a given query does not select exact one record (e.g. a missing period), define an
error message: ::

  fillStoreSystemBySql1: SELECT name FROM Person WHERE name='Doe'
  fillStoreSystemBySqlErrorMsg1: Too many or to few "Doe's" in our database

.. _`periodId`:

periodId
""""""""

This is

* a usecase, implemented via `fillStoreSystemBySql`_,
* a way to access `Period.id` with respect to the current period (the period itself is custom defined).

After a full QFQ installation:

* a table `Period` (extend / change it to your needs, fill them with your periods),
* one sample record in table `Period`,

Websites, delivering semester data, school year schedules, or any other type or periods, often need an index to the
*current* period.

In configuration_: ::

  fillStoreSystemBySql1: SELECT id AS periodId FROM Period WHERE start<=NOW() ORDER BY start DESC LIMIT 1

a variable 'periodId' will automatically computed and filled in STORE SYSTEM. Access it via `{{periodId:Y0}}`.
To get the name and current period: ::

  SELECT name, ' / ', start FROM Period WHERE id={{periodId:Y0}}

Typically, it's necessary to offer a 'previous' / 'next' link. In this example, the STORE SIP holds the new periodId: ::

  SELECT CONCAT('p:{{pageAlias:T}}&periodId=', {{periodId:SY0}}-1, '|Next') AS _page, ' ', name, ' ',
    CONCAT('p:{{pageAlias:T}}&periodId=', {{periodId:SY0}}+1, '|Next') AS _page FROM Period AS s WHERE s.id={{periodId:SY0}}

Take care for minimum and maximum indexes (do not render the links if out of range).

.. _`DbUserPrivileges`:

DB USER privileges
^^^^^^^^^^^^^^^^^^

The specified DB User needs privileges to the database of at least: SELECT / INSERT / UPDATE / DELETE / SHOW.

To apply automatically QFQ-'DB UPDATE' the following rights are mandatory too: CREATE / ALTER

To get access to the Typo3 installation, 'dbuser' should also have access to the Typo3 Database with at least SELECT / INSERT / UPDATE / DELETE.



.. _`ExceptionMaxLength`:

Exception for SECURITY_GET_MAX_LENGTH
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

If it is necessary to use a GET variable which exceeds `securityGetMaxLength` limit, name the variable with '_<num>' at
the end. E.g. `my_long_variable_130`. Such a variable has an allowed length of 130 chars. Access the variable as
usual with the variable name: `{{my_long_variable_130:C:...}}`.


.. _`sessionTimeoutSeconds`:

FE-User: Session timeout seconds
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

There is no timeout for website users who are not logged in (but typically those users don't have access to protected content).

For logged in users, the default timeout is the php.ini settings for `session.cookie_lifetime` and `session.gc_maxlifetime`
(minimum of both). These timeout only affects QFQ related content and can be
specified a) globally (QFQ configuration) and b) specific per Form.

The maximum timeout depends on the minimal value of php.ini `session.cookie_lifetime` and `session.gc_maxlifetime`.
Specifying a higher value produces an error in the front end.

Every access to QFQ related content resets the timeout.

After FE login, the next access to QFQ related content starts the timeout counter.

.. _concept:

Concept
=======

SIPs
----

The following is a technical background information. Not needed to just use QFQ.

The SIPs (=Server Id Pairs) are uniq timestamps, created/registered on the fly for a specific browser session (=user). Every SIP is
registered on the server (= stored in a browser session) and contains one or more key/value pairs. The key/value pairs never leave
the server. The SIPs will be used:

* to protect values not to be spoofed by anyone,
* to protect values not to be altered by anyone,
* to grant access, e.g.:

  * load and save forms,
  * upload files,
  * download files,
  * PHP AJAX pages.

SIPs becomes invalid, as soon as the current browser session is destroyed. The client (= user) can't manipulate the content
of SIPs - it's only possible to reuse already registered SIPs by the user, who already owns the session.

Access privileges
-----------------

The Typo3 FE Groups can be used to implement access privileges. Such groups are assigned to

* Typo3 FE users,
* Typo3 pages,
* and/or Typo3 content records (e.g. QFQ records).

This will be used for general page structure privileges.

A `record base` privileges controlling (e.g. which user can edit
which person record) will be implicit configured, by the way that records are viewable / editable (or not) through
SQL in the specific QFQ tt-content statements.

Typo3 QFQ content element
-------------------------

Insert one or more QFQ content elements on a Typo3 page. Specify column and language per content record as wished.

The title of the QFQ content element will not be rendered on the frontend. It's only visible to the webmaster in the
backend for orientation.

.. _qfq_keywords:

QFQ Keywords (Bodytext)
^^^^^^^^^^^^^^^^^^^^^^^

**All of these parameters are optional.**

 +-------------------+---------------------------------------------------------------------------------+
 | Name              | Explanation                                                                     |
 +===================+=================================================================================+
 | form              | | Formname.                                                                     |
 |                   | | Static: **form = person**                                                     |
 |                   | | By SIP: **form = {{form:SE}}**                                                |
 |                   | | By SQL: **form = {{SELECT c.form FROM Config AS c WHERE c.id={{a:C}} }}**     |
 +-------------------+---------------------------------------------------------------------------------+
 | r                 | | <record id>. The form will load the record with the specified id.             |
 |                   | | Static: **r = 123**                                                           |
 |                   | | By SQL: **r = {{SELECT ...}}**                                                |
 |                   | | If not specified, the SIP parameter 'r' is used.                              |
 +-------------------+---------------------------------------------------------------------------------+
 | dbIndex           | E.g. `dbIndex = {{indexQfq:Y}}` Select a DB index. Only necessary if a          |
 |                   | different than the standard DB should be used.                                  |
 +-------------------+---------------------------------------------------------------------------------+
 | debugShowBodyText | If='1' and configuration_:*showDebugInfo: yes*, shows a tooltip with bodytext   |
 +-------------------+---------------------------------------------------------------------------------+
 | sqlLog            | Overwrites configuration_: `SQL_LOG`_ . Only affects `Report`, not `Form`.      |
 +-------------------+---------------------------------------------------------------------------------+
 | sqlLogMode        | Overwrites configuration_: `SQL_LOG_MODE`_ . Only affects `Report`, not `Form`. |
 +-------------------+---------------------------------------------------------------------------------+
 | render            | See `report-render`_. Overwrites configuration_: render.                        |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fbeg      | Start token for every field (=column)                                           |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fend      | End token for every field (=column)                                             |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fsep      | Separator token between fields (=columns)                                       |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fskipwrap | Skip wrapping (via fbeg, fsep, fend) of named columns. Comma separated list of  |
 |                   | column id's (starting at 1). See also the special column name '_noWrap' to      |
 |                   | suppress wrapping.                                                              |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.shead     | Static start token for whole <level>, independent if records are selected       |
 |                   | Shown before `head`.                                                            |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.stail     | Static end token for whole <level>, independent if records are selected.        |
 |                   | Shown after `tail`.                                                             |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.head      | Dynamic start token for whole <level>. Only if at least one record is select.   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.tail      | Dynamic end token for whole <level>. Only if at least one record is select.     |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rbeg      | Start token for row.                                                            |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rbgd      | Alternating (per row) token.                                                    |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rend      | End token for row. Will be rendered **before** subsequent levels are processed  |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.renr      | End token for row. Will be rendered **after** subsequent levels are processed   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rsep      | Seperator token between rows                                                    |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.sql       | SQL Query                                                                       |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.twig      | Twig Template                                                                   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.althead   | If <level>.sql has no rows selected (empty), these token will be rendered.      |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.altsql    | If <level>.sql has no rows selected (empty) or affected (delete, update, insert)|
 |                   | the <altsql> will be fired. Note: Sub queries of <level> are not fired, even if |
 |                   | <altsql> selects some rows.                                                     |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.content   | | *show* (default): content of current and sub level are directly shown.        |
 |                   | | *hide*: content of current and sub levels are stored and not shown.           |
 |                   | | *hideLevel*: content of current and sub levels are stored and only sub levels |
 |                   | | are shown.                                                                    |
 |                   | | *store*: content of current and sub levels are stored and shown.              |
 |                   | | To retrieve the content: `{{<level>.line.content}}`. See `syntax-of-report`_  |
 +-------------------+---------------------------------------------------------------------------------+

.. _`report-render`:

Report: render
--------------

QFQ will render Report or Form in three situations:

  #. Browser: The QFQ content is described by QFQ-Report syntax.
  #. Browser: The QFQ content is described by a QFQ-Form.
  #. API: The QFQ content is handled without Typo3. Typically a single tt-content record is specified in the request - only
     that one is rendered by QFQ. This mode is typically used to export data like Excel Export.

Option 1 and 2 are distinguished by the parameter `form` (STORE_SIP or STORE_TYPO3). If 'form' is given, in most cases only a Form
should be shown (not the report).

+--------+-------------------------------------------------------------------------+
| render | Use                                                                     |
+========+=========================================================================+
| single | Display Form or Report, but not both at the same time. If               |
|        | a SIP parameter 'form' is given, the form is rendered, else the report. |
+--------+-------------------------------------------------------------------------+
| both   | Display Form and Report, both at the same time.                         |
+--------+-------------------------------------------------------------------------+
| api    | Create output only when called via API (no Typo3).                      |
+--------+-------------------------------------------------------------------------+


.. _`qfq-database`:

QFQ Database
------------

Recommended setup for Typo3 & QFQ Installation is with *two* databases. One for the Typo3 installation and one for QFQ.
A good practice is to name both databases equal, appending the suffix '_t3' and '_db'.

When QFQ is called, it checks for QFQ system tables. If they do not exist or have a lower version than the installed QFQ
version, the system tables will be automatically installed or updated.

.. _`system-tables`:

System tables
^^^^^^^^^^^^^

+---------------+------------+------------+
| Name          | Use        | Database   |
+===============+============+============+
| Clipboard     | Temporary  | QFQ        |
+---------------+------------+------------+
| Cron          | Persistent | QFQ        |
+---------------+------------+------------+
| Dirty         | Temporary  | QFQ | Data |
+---------------+------------+------------+
| Form          | Persistent | QFQ        |
+---------------+------------+------------+
| FormElement   | Persistent | QFQ        |
+---------------+------------+------------+
| FormSubmitLog | Persistent | QFQ | Data |
+---------------+------------+------------+
| MailLog       | Persistent | QFQ | Data |
+---------------+------------+------------+
| Period        | Persistent | Data       |
+---------------+------------+------------+
| Split         | Persistent | Data       |
+---------------+------------+------------+

See `mail-log-page`_ and `form-submit-log-page`_ for some Frontend views for these tables.

* Check Bug #5459 / support of system tables in different DBs not supported.

.. _`multi-database`:

Multi Database
^^^^^^^^^^^^^^

Base: T3 & QFQ
""""""""""""""

QFQ typically interacts with one database, the QFQ database. The database used by Typo3 is typically a separate one.
Theoretically it might be the same (never tested), but it's strongly recommended to use a separated QFQ database to have
no problems on Typo3 updates and to have a clean separation between Typo3 and QFQ.

QFQ: System & Data
""""""""""""""""""

QFQ itself can be separated in 'QFQ system' (see `system-tables`_) and 'QFQ data' databases (even more than one are
possible). The 'QFQ system' stores the forms, record locking, log tables and so on - `QFQ data` is for the rest.

A `Multi Database` setup is given, if 'QFQ system' is different from 'QFQ data'.

Data: Data1, Data2, ..., Data n
"""""""""""""""""""""""""""""""

Every database needs to be configured via `configuration`_ with it's own `index`.

`QFQ data` might switch between different 'data'-databases. In configuration_ one main `QFQ data` index will be specified
in `indexQfq`. If specific forms or reports should use a different database than that, `dbIndex` might change
`indexData` temporarily.

`dbIndex`: A `Report` (field `dbIndex`) as well as a `Form` (field `parameter`.`dbIndex`) can operate on a specific database.


A `Form` will:

* load the form-definition from `indexQfq` (table `Form` and `FormElement`),
* loads and save data from/in `indexData` (config.qfq.php) / `dbIndex` (form.parameter.dbIndex),
* retrieve extra information via `dbIndexExtra` - this is useful to offer information from a database and save them in a
  different one.

The simplest setup, QFQ system & data in the same database, needs no `indexQfq / indexData` definition in
configuration_ or one or both of them set to '1'

To separate QFQ system and data, indexQfq and indexData will have different indexes.


A Multi Database setup might be useful for:

* several independent Typo3 QFQ installations (each have it's own form repository) and one central database, or
* one QFQ installation which should display / load /save records from different databases, or
* a combination of the above two.

Note:

* Option 'A' is the most simple and commonly used.
* Option 'B' separate the T3 and QFQ databases on two database hosts.
* Option 'C' is like 'B' but with a shared 'QFQ data'-database between three 'Typo3 / QFQ' instances.
* Further variants are possible.

+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
|   | Domain         | Website Host | T3                            | QFQ system                   | QFQ data                         |
+===+================+==============+===============================+==============================+==================================+
| A | standalone.edu | 'w'          | <dbHost>, <dbname>_t3, <dbnameSingle>_db                                                        |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB1.edu      | 'wApp'       | <dbHostApp>, <dbnameB1>_t3    | <dbHostB1>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB2.edu      | 'wApp'       | <dbHostApp>, <dbnameB2>_t3    | <dbHostB2>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC1.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC1>_t3   | <dbHostC>, <dbnameSysC1>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC2.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC2>_t3   | <dbHostC>, <dbnameSysC2>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC3.edu      | 'wAppC3'     | <dbHostAppC3>, <dbnameC3>_t3  | <dbHostC3>, <dbnameSysC3>_db | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+

In config-qfq-php_ mutliple database credentials can be prepared. Mandatory is at least one credential setup like
`DB_1_USER`, `DB_1_SERVER`, `DB_1_PASSWORD`, `DB_1_NAME`. The number '1' indicates the `dbIndex`. Increment the number
to specify further database credential setups.

Typically the credentials for `DB_1`  also have access to the T3 database.


Different QFQ versions, shared database
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

When using different QFQ versions and a shared 'QFQ data'-database, there is some risk of conflicting
'QFQ system' tables. Best is to always use the same QFQ version on all instances or use a Multi Database setup.

.. _debug:

Debug
=====

.. _QFQ_LOG:

QFQ Log
-------

Setup in configuration_

* *qfqLog*

  * Filename where to log QFQ debug and error messages.