# runkit_constant_add

(PECL runkit >= 0.7.0)

runkit_constant_add — Similar to define(), but allows defining in class definitions as well

### 说明

runkit_constant_add ( string `$constname` , mixed `$value` ) : bool

### 参数

`constname`

  Name of constant to declare. Either a string to indicate a global constant, or classname::constname to indicate a class constant.

`value`

  NULL, Bool, Long, Double, String, or Resource value to store in the new 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_redefine() - Redefine an already defined constant
- runkit_constant_remove() - Remove/Delete an already defined constant