array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'de', ), 'this' => array ( 0 => 'function.get-defined-constants.php', 1 => 'get_defined_constants', 2 => 'Returns an associative array with the names of all the constants and their values', ), 'up' => array ( 0 => 'ref.info.php', 1 => 'PHP-Optionen-/-Informationen-Funktionen', ), 'prev' => array ( 0 => 'function.get-current-user.php', 1 => 'get_current_user', ), 'next' => array ( 0 => 'function.get-extension-funcs.php', 1 => 'get_extension_funcs', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/info/functions/get-defined-constants.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

get_defined_constants

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

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

Beschreibung

get_defined_constants(bool $categorize = false): array

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

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
(
    [Core] => 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
        )

)

Rückgabewerte

Returns an array of constant name => constant value array, optionally groupped by extension name registering the constant.

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