# runkit_constant_remove

(PECL runkit >= 0.7.0)

runkit_constant_remove — Remove/Delete an already defined constant

### 说明

runkit_constant_remove ( string `$constname` ) : bool

### 参数

`constname`

  Name of constant to remove. Either a string indicating a global constant, or classname::constname indicating a class constant.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 参见

- define() - 定义一个常量
- runkit_constant_add() - Similar to define(), but allows defining in class definitions as well
- runkit_constant_redefine() - Redefine an already defined constant