apc_define_constants - Defines a set of constants for retrieval and mass-definition
Вернуться к: APC
apc_define_constants
(PECL apc >= 3.0.0)
apc_define_constants — Defines a set of constants for retrieval and mass-definition
Описание
$key
, array $constants
[, bool $case_sensitive = true
] )define() is notoriously slow. Since the main benefit of APC is to increase the performance of scripts/applications, this mechanism is provided to streamline the process of mass constant definition. However, this function does not perform as well as anticipated.
For a better-performing solution, try the » hidef extension from PECL.
Замечание: To remove a set of stored constants (without clearing the entire cache), an empty array may be passed as the
constantsparameter, effectively clearing the stored value(s).
Список параметров
-
key -
The
keyserves as the name of the constant set being stored. Thiskeyis used to retrieve the stored constants in apc_load_constants(). -
constants -
An associative array of constant_name => value pairs. The constant_name must follow the normal constant naming rules. value must evaluate to a scalar value.
-
case_sensitive -
The default behaviour for constants is to be declared case-sensitive; i.e. CONSTANT and Constant represent different values. If this parameter evaluates to
FALSEthe constants will be declared as case-insensitive symbols.
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Примеры
Пример #1 apc_define_constants() example
<?php
$constants = array(
'ONE' => 1,
'TWO' => 2,
'THREE' => 3,
);
apc_define_constants('numbers', $constants);
echo ONE, TWO, THREE;
?>
Результат выполнения данного примера:
123
Смотрите также
- apc_load_constants() - Loads a set of constants from the cache
- define() - Определяет именованную константу
- constant() - Возвращает значение константы
- Or the PHP constants reference
Вернуться к: APC