ExpressionEngine Docs

Constants Reference

The ExpressionEngine core defines a variety of constants to ensure consistency in several aspects. Please be aware that some of the constants may not be defined, or have different meaning, in the context of the ExpressionEngine installer.

Path Constants

Version Constants

URL Constants

HTML Constants

Request Constants

Filesystem Mode Constants

These constants are located in expressionengine/config/constants.php, and are user configurable to their hosts’ requirements. You should always use these constants for creating and writing to files so that you do not have to worry about which permissions to use. Listed alongside each is their default equivalency.