Constants in TYPO3 define paths and database information. These values are global and cannot be changed. Constants are defined at various points during the bootstrap sequence.
To make the information below a bit more compact, namespaces were left out. Here are the fully qualified class names referred to below:
- “SystemEnvironmentBuilder” =
- “Bootstrap” =
for more constants.
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.
- Defined in:
- Available in Frontend:
Different types of files constants are defined in
These constants are available for different groups of files as documented in
These file types are assigned to all FAL resources. They can, for example, be used in Fluid to decide how to render different types of files.
|FILETYPE_TEXT||1||Any kind of text|
|FILETYPE_IMAGE||2||Any kind of image|
|FILETYPE_AUDIO||3||Any kind of audio|
|FILETYPE_VIDEO||4||Any kind of video|
|FILETYPE_APPLICATION||5||Any kind of application|
HTTP status codes¶
The different status codes available are defined in
These constants are defined as documented in https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml