PHP-Handbuch: Returns an associative array with the names of all the constants and their values

Beschreibung

array get_defined_constants ([ bool $categorize = false ] )

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.

Changelog

Version	Beschreibung
5.3.1	Windows only: Core constants are categorized under Core, previously mhash.
5.3.0	Core constants are categorized under Core, previously internal. On Windows, the Core Constants are categorized under mhash.
5.2.11	The `categorize` parameter now operates appropriately. Previously, the `categorize` parameter was interpreted as !is_null($categorize), making any value other than `NULL` force the constants to be categorized.

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