PHP Manual
runkit 函数
Remove/Delete an already defined constant

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

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