runkit7_constant_remove

(PECL runkit7 >= Unknown)

runkit7_constant_remove — Remove/Delete an already defined constant

说明

runkit7_constant_remove(string $constant_name): bool

参数

constant_name

Name of the constant to remove. Either the name of 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