apc_load_constants()

(PECL apc >= 3.0.0)

Loads a set of constants from the cache

说明

apc_load_constants(string $key[,bool $case_sensitive= TRUE]): bool

Loads a set of constants from the cache.

参数

$key: The name of the constant set(that was stored with apc_define_constants())to be retrieved.
$case_sensitive: The default behaviour for constants is to be declared case-sensitive; i.e.CONSTANTandConstantrepresent different values. If this parameter evaluates to FALSE the constants will be declared as case-insensitive symbols.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

范例

Example #1 apc_load_constants() example

<?php
$constants = array(
    'ONE'   => 1,
    'TWO'   => 2,
    'THREE' => 3,
);
apc_define_constants('numbers', $constants);
apc_load_constants('numbers');
echo ONE, TWO, THREE;
?>

以上例程会输出：

参见

apc_define_constants()Defines a set of constants for retrieval and mass-definition
define()定义一个常量
constant()返回一个常量的值
Or the PHP constants reference

There doesn't seem to be a way to store constants that have already been defined. This function, apc_define_constants(), does both things: (1) defines a constant, and (2) stores the constant in the cache. This is unfortunate, since it introduces the requirement to handle constant definitions differently when APC is not available.
(If this function had a "$do_not_define" parameter, or the like, that would give it more flexibility. I suppose filing a bug report would be a step in the right direction to getting this idea considered.)