# apc_load_constants

(PECL apc >= 3.0.0)

apc_load_constants — 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. CONSTANT and Constant represent 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：

    123

### 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