.. You may want to use the usual include line. Uncomment and adjust the path. 
.. include:: ../Includes.txt


===================================
EXT: check for installed extensions
===================================

:Author:
      Kasper Skårhøj

:Created:
      2002-11-01T00:32:00

:Changed by:
      Franz Holzinger

:Changed:
      2015-05-01T18:08:41

:Classification:
      patch10011

:Keywords:
      forEditors, forDevelopers, forIntermediates, Extension Manager

:Author:
      Franz Holzinger

:Email:
      franz@ttproducts.de

:Info 4:


:Language:
      en


|img-1| EXT: check for installed extensions - patch10011


.. _EXT-check-for-installed-extensions:

EXT: check for installed extensions
===================================

Extension Key: patch10011

Language: en

Keywords: forEditors, forDevelopers, forIntermediates, Extension
Manager

Copyright 2015, Franz Holzinger, <franz@ttproducts.de>

This document is published under the Open Content License

available from http://www.opencontent.org/opl.shtml

The content of this document is related to TYPO3

\- a GNU/GPL CMS/Framework available from www.typo3.org

.. _Table-of-Contents:

Table of Contents
-----------------

`EXT: check for installed extensions 1
<#__RefHeading__399_1027078062>`_

**`Introduction 3 <#__RefHeading__401_1027078062>`_**

`What does it do? 3 <#__RefHeading__403_1027078062>`_

**`Users manual 4 <#__RefHeading__405_1027078062>`_**

**`Administration 5 <#__RefHeading__407_1027078062>`_**

`Reference 5 <#__RefHeading__409_1027078062>`_

**`Known problems 6 <#__RefHeading__411_1027078062>`_**

**`To-Do list 7 <#__RefHeading__413_1027078062>`_**

**`ChangeLog 8 <#__RefHeading__415_1027078062>`_**


.. _Introduction:

Introduction
------------


.. _What-does-it-do:

What does it do?
^^^^^^^^^^^^^^^^

- It is sometimes necessary to give a different setup if an additional
  extension has been installed. See `bug10011
  <http://bugs.typo3.org/view.php?id=10011>`_ , which is pending in the
  Core list for many years. You can use this to write one template setup
  for several sites with different installed extensions. You can
  configure an alternative output in the FE if an extension has not been
  installed. This can be used also for the default setup of extensions.
  Maybe you want to read an additional table field from the database if
  another extension has been installed.

- The Typoscript match condition userFunc (user defined) allows to have
  multiple parameters and a return value which can be checked against
  string values.

**Example:**

::

   [userFunc = tx_ttproducts_match_condition->checkShipping(delivery, country_code) = DEU]
   some Typoscript lines
   
   
   [ext=tt_news:version > 3.5.99]
   Typoscript lines which will be active only if tt_news in a version greater than 3.5.99 has been installed.


.. _Users-manual:

Users manual
------------

Just install the extension together with any other extension which
supports this patch. This will enable new conditions for the template
setup.

Be aware that this extension is using code based on the replacement of
TYPO3 classes. Maybe it will make parts of TYPO3 unusable. If you
discover any trouble with TYPO3 conditions, then deinstall this
extension.


.. _Administration:

Administration
--------------


.. _Reference:

Reference
^^^^^^^^^

See TSref


.. _ext:

ext
"""


.. _Syntax:

Syntax:
~~~~~~~

::

   [ext=extensionkey:parameter = value1, >value2, =value3, <value4, ...]


.. _Comparison:

Comparison:
'''''''''''

The values are compared with the attributes of the extension key .

paramters:

active, title, author, author\_email, author\_company, version,
CGLcompliance, CGLcompliance\_note


.. _Examples:

Examples:
~~~~~~~~~

::

      [ext=tt_news:active = 1]

or

::

      [ext=tt_news:version > 1.2.3]


.. _Known-problems:

Known problems
--------------

- In TYPO3 6.x.x before 6.2.13 you must apply this patch:
  `https://review.typo3.org/#/c/38917/
  <https://review.typo3.org/#/c/38917/>`_

- Some TYPO3 Core developer consider this patch as not useful. Please
  explain them the reasons why the current TYPO3 possibilities are not
  sufficient and simple enough to get the job done.


.. _To-Do-list:

To-Do list
----------

- This patch should become part of TYPO3. If you consider this extension
  useful, then please add your comments here:
  `https://forge.typo3.org/issues/19739
  <https://forge.typo3.org/issues/19739>`_

- Outdated info: This patch has been pending in the Core list since
  2008.
  
  |img-2|


.. _ChangeLog:

ChangeLog
---------

See the file "ChangeLog"


8


.. ######CUTTER_MARK_IMAGES######

.. |img-1| image:: img-1.png
.. :align: left

.. |img-2| image:: img-2.png
.. :align: left
.. :border: 0
.. :height: 363
.. :id: images1
.. :name: images1
.. :width: 669