Constants¶

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Constants¶
Constants normally define paths and database information. These values
are global and cannot be changed when they are first defined. This is
why constants are used for such vital information.
These constants are defined at various points during the bootstrap sequence.
The column "Avail. in FE" is an indicator that tells you if the
constant, variable or class mentioned is also available to scripts
running under the frontend of the "cms" extension.

Note
To make the information 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

Traditional List¶

TYPO3_MODE¶

Defined in:

\TYPO3\CMS\Backend\Http\Application::defineLegacyConstants()
\TYPO3\CMS\Core\Console\CommandApplication::defineLegacyConstants()
\TYPO3\CMS\Frontend\Http\Application::defineLegacyConstants()
\TYPO3\CMS\Install\Http\Application::defineLegacyConstants()

Description:
Mode of TYPO3: Set to either "FE" or "BE" depending on frontend or
backend execution and context.

Available in Frontend:
Yes
value = "FE"

TYPO3_OS¶

Defined in:
SystemEnvironmentBuilder::defineBaseConstants()

Description:

Note

This constant has been marked as deprecated and will be removed with TYPO3 v10. Use \TYPO3\CMS\Core\Core\Environment::getPublicPath() to retrieve the information.
Use Environment::isWindows() and Environment::isUnix() instead.

Operating system; Windows = "WIN", other = "" (presumed to be some
sort of Unix)

Available in Frontend:
Yes

PATH_thisScript¶

Defined in:
SystemEnvironmentBuilder::definePaths()

Description:

Note
This constant has been marked as deprecated and will be removed with TYPO3 v10. Use \TYPO3\CMS\Core\Core\Environment::getCurrentScript() to retrieve the information.
Abs. path to current script.

Available in Frontend:
Yes

TYPO3_mainDir¶

Defined in:
SystemEnvironmentBuilder::definePaths()

Description:
This is the directory of the backend administration for the sites of
this TYPO3 installation. Hardcoded to typo3/. Must be a subdirectory
to the website. See elsewhere for descriptions on how to change the
default admin directory, typo3/, to something else.

Available in Frontend:
Yes

PATH_typo3¶

Defined in:
SystemEnvironmentBuilder::definePaths()

Description:

Note
This constant has been marked as deprecated and will be removed with TYPO3 v10. Use \TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/typo3' to retrieve the information.

Abs. path of the TYPO3 admin dir.

Available in Frontend:
No

PATH_site¶

Defined in:
SystemEnvironmentBuilder::definePaths()

Description:

Note
This constant has been marked as deprecated and will be removed with TYPO3 v10. Use \TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/' to retrieve the information.

Absolute path to directory with the frontend (one directory above
\TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/typo3/)

Available in Frontend:
Yes

PATH_typo3conf¶

Defined in:
SystemEnvironmentBuilder::definePaths()

Description:

Note
This constant has been marked as deprecated and will be removed with TYPO3 v10. Use \TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/typo3conf' to retrieve the information.

Absolute TYPO3 configuration path (local, not part of source).

Available in Frontend:
Yes

TYPO3_version¶

Defined:
SystemEnvironmentBuilder::defineBaseConstants()

Description:
The TYPO3 version, as a "x.y.z" number. Development versions will be either
"x.y.z-dev" for stable versions or "x.y-dev" for the current master.

Available in Frontend:
Yes

TYPO3_branch¶

Defined in:
SystemEnvironmentBuilder::defineBaseConstants()

Description:
The TYPO3 version Branch, as a "x.y" number. Without the patch level.

Available in Frontend:
Yes

Base Constants¶
Check \TYPO3\CMS\Core\Core\SystemEnvironmentBuilder::defineBaseConstants()
for updates.

This Version, Branch and Copyright¶

Constant
Example value

TYPO3_version
'7.6.1-dev'

TYPO3_branch
'7.6'

TYPO3_copyright_year
'1998-2015'

TYPO3 External Links¶

Constant
Example value

TYPO3_URL_GENERAL
'https://typo3.org/'

TYPO3_URL_LICENSE
'https://typo3.org/typo3-cms/overview/licenses/'

TYPO3_URL_EXCEPTION
'https://typo3.org/go/exception/CMS/'

TYPO3_URL_MAILINGLISTS
'https://lists.typo3.org/cgi-bin/mailman/listinfo'