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# get_defined_constants

(PHP 4 >= 4.1.0, PHP 5)

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

## Beschreibung

array get_defined_constants ( [mixed categorize] )

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.

## Parameter Liste

`categorize`

  May be passed, causing this function to return a multi-dimensional array with categories in the keys of the first dimension and constants and their values in the second dimension.

  `<?php define("MY_CONSTANT", 1); print_r(get_defined_constants(true)); ?>`

  Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

      Array
      (
          [internal] => 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
              )

          [pcre] => Array
              (
                  [PREG_PATTERN_ORDER] => 1
                  [PREG_SET_ORDER] => 2
                  [PREG_OFFSET_CAPTURE] => 256
                  [PREG_SPLIT_NO_EMPTY] => 1
                  [PREG_SPLIT_DELIM_CAPTURE] => 2
                  [PREG_SPLIT_OFFSET_CAPTURE] => 4
                  [PREG_GREP_INVERT] => 1
              )

          [user] => Array
              (
                  [MY_CONSTANT] => 1
              )

      )

  > Anmerkung: The value of the `categorize` parameter is irrelevant, only its presence is considered.

## Rückgabewerte

## ChangeLog

Version | Beschreibung
--- | ---
5.0.0 | The `categorize` parameter was added.

## Beispiele

Beispiel 1. get_defined_constants() Example
`<?php print_r(get_defined_constants()); ?>`
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
    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
    )

## Siehe auch

defined()
get_loaded_extensions()
get_defined_functions()
get_defined_vars()

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