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# get_defined_constants

(PHP 4 >= 4.1.0)

get_defined_constants -- Returns an associative array with the names of all the constants and their values.

## Description

``array get_defined_constants` (void)`

This function returns the names and values of all the constants currently defined. This includes those created by extensions as well as those created with the define() function.

For example the line below

    print_r (get_defined_constants());

will print a list like:

    Array
    (
        [E_ERROR] => 1
        [E_WARNING] => 2
        [E_PARSE] => 4
        [E_NOTICE] => 8
        [E_CORE_ERROR] => 16
        [E_CORE_WARNING] => 32
        [E_COMPILE_ERROR] => 64
        [E_COMPILE_WARNING] => 128
        [E_USER_ERROR] => 256
        [E_USER_WARNING] => 512
        [E_USER_NOTICE] => 1024
        [E_ALL] => 2047
        [TRUE] => 1
    )

See also get_loaded_extensions().

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