Core API

< 2.1.8. ext_emconf.php

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2.1.9. Extending "extensions-classes"

A rather exotic thing to do but nevertheless...

If you are programming extensions yourself you should as a standard procedure include the "class extension code" in the bottom of the class file:

  if (defined("TYPO3_MODE") &&     $TYPO3_CONF_VARS[TYPO3_MODE]["XCLASS"]["ext/class.cool_shop.php"])    {

      include_once($TYPO3_CONF_VARS[TYPO3_MODE]["XCLASS"]["ext/class.cool_shop.php"]);

Normally the key used as example here ("ext/class.cool_shop.php") would be the full path to the script relative to the PATH_site constant. However because modules are required to work from both typo3/sysext/, typo3/ext/ and typo3conf/ext/ it is policy that any path before "ext/" is omitted.

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