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

Описание

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.

Список параметров

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));
?>

Результатом выполнения данного примера будет что-то подобное:

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
        )

)

Возвращаемые значения

Список изменений

Версия	Описание
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.
5.0.0	The `categorize` parameter was added.

Примеры

Пример #1 get_defined_constants() Example


<?php
print_r(get_defined_constants());
?>

Результатом выполнения данного примера будет что-то подобное:

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
)

Смотрите также

defined() - Проверяет существование указанной именованной константы
get_loaded_extensions() - Returns an array with the names of all modules compiled and loaded
get_defined_functions() - Возвращает массив всех определённых функций
get_defined_vars() - Возвращает массив всех определенных переменных