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$GLOBALS

Note

Variables in italics may be set in a script prior to the bootstrap process so they are optional.

Note

To make the table below a bit more compact, namespaces were left out. Here are the fully qualified class names referred to below:

• "SystemEnvironmentBuilder" = \TYPO3\CMS\Core\Core\SystemEnvironmentBuilder

• "Bootstrap" = \TYPO3\CMS\Core\Core\Bootstrap

• "PackageManager" = \TYPO3\CMS\Core\Package\PackageManager

Global variable	Defined in	Description	Avail. in FE
$GLOBALS['TYPO3_CONF_VARS']	typo3/sysext/core/Configuration/DefaultConfiguration.php	TYPO3 configuration array. Please refer to file typo3/sysext/core/Configuration/DefaultConfigurationDescription.php where each option is described in detail in the comments. The same comments are also available in the Install Tool when you choose "All Configuration".	Yes
$GLOBALS['TYPO3_LOADED_EXT']	PackageManager::loadPackageManagerStatesFromCache() PackageManager::initializeCompatibilityLoadedExtArray()	Array with all loaded extensions listed with a set of paths. You can check if an extension is loaded by the function \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded($key) where $key is the extension key.	Yes
$GLOBALS['EXEC_TIME']	SystemEnvironmentBuilder::initializeGlobalTimeTrackingVariables()	Is set to time() so that the rest of the script has a common value for the script execution time. Note Should not be used anymore, rather use the DateTime Aspect.	Yes
$GLOBALS['SIM_EXEC_TIME']	SystemEnvironmentBuilder::initializeGlobalTimeTrackingVariables()	Is set to $GLOBALS['EXEC_TIME'] but can be altered later in the script if we want to simulate another execution-time when selecting from e.g. a database (used in the frontend for preview of future and past dates) Note Should not be used anymore, rather use the DateTime Aspect.	Yes
$GLOBALS['PAGES_TYPES']	typo3/sysext/core/ext_tables.php	See Page Types	(occasionally)
$GLOBALS['TCA']	Bootstrap::loadExtensionTables()	See TCA Reference	Yes, partly
$GLOBALS['TBE_MODULES']	typo3/sysext/core/ext_tables.php	The backend main/sub-module structure. See section elsewhere plus source code of class \TYPO3\CMS\Backend\Module\ModuleLoader which also includes some examples.	(occasionally)
$GLOBALS['TBE_STYLES']	typo3/sysext/core/ext_tables.php	Contains information related to BE skinning.	(occasionally)
$GLOBALS['T3_SERVICES']	SystemEnvironmentBuilder::initializeGlobalVariables()	Global registration of services.	Yes
$GLOBALS['T3_VAR']	SystemEnvironmentBuilder::initializeGlobalVariables()	Space for various internal global data storage in TYPO3. Each key in this array is a data space for an application. Keys currently defined for use is: ['callUserFunction'] + ['callUserFunction_classPool']: Used by \TYPO3\CMS\Core\Utility\GeneralUtility::callUserFunction to store singleton objects. ['RTEobj'] : Used to hold the current RTE object if any. See \TYPO3\CMS\Backend\Utility\BackendUtility. ['ext'][ extension-key ] : Free space for extensions.	Yes
$GLOBALS['BE_USER']	Bootstrap::initializeBackendUser()	Backend user object. See Backend User Object.	(depends)
$GLOBALS['TBE_MODULES_EXT']	[In ext_tables.php files of extensions]	Used to store information about modules from extensions that should be included in "function menus" of real modules. See the Extension API for details.	(occasionally)
$GLOBALS['TCA_DESCR']	[tables.php files]	Can be set to contain file references to local lang files containing TCA_DESCR labels. See section about Context Sensitive Help.	No

Exploring Global Variables

Many of the global variables described above can be inspected using the ADMIN TOOLS > Configuration module.

Warning

This module is always viewed in the BE context. Variables defined only in the FE context will not be visible there.

Note

This module is purely a browser. It does not let you change values.

It also lets you browse a number of other global arrays. Just be curious and investigate!

Viewing the $GLOBALS['TYPO3_CONF_VARS] array using the ADMIN TOOLS > Configuration module