# runkit_constant_redefine

(PECL runkit >= 0.7.0)

runkit_constant_redefine — Redefine an already defined constant

### 说明

runkit_constant_redefine ( string `$constname` , mixed `$newvalue` ) : bool

### 参数

`constname`

  Constant to redefine. Either string indicating global constant, or classname::constname indicating class constant.

`newvalue`

  New value to assign to constant.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 参见

- runkit_constant_add() - Similar to define(), but allows defining in class definitions as well
- runkit_constant_remove() - Remove/Delete an already defined constant