(PECL apc >= 3.0.0)
apc_load_constants — Loads a set of constants from the cache
Loads a set of constants from the cache.
The name of the constant set (that was stored with apc_define_constants()) to be retrieved.
The default behaviour for constants is to be declared case-sensitive; i.e. CONSTANT and Constant represent different values. If this parameter evaluates to FALSE the constants will be declared as case-insensitive symbols.
如果成功则返回 TRUE，失败则返回 FALSE。
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;
?>
上例将输出：
123