Predefined Variables
Predefined Variables
- PHP provides a large number of predefined variables to any script which it runs.
- Many of these variables, however, cannot be fully documented as they are dependent upon which server is running, the version and setup of the server, and other factors.
- Some of these variables will not be available when PHP is run on the command line.
- From version 4.1.0 onward, PHP provides an additional set of predefined arrays containing variables from the web server (if applicable), the environment, and user input.