uopz_undefine
(PECL uopz 1, PECL uopz 2, PECL uopz 5, PECL uopz 6, PECL uopz 7)
uopz_undefine — Undefine a constant
说明
Removes the constant at runtime
参数
-
class -
The name of the class containing
constant -
constant -
The name of an existing constant
返回值
成功时返回 true， 或者在失败时返回 false。
示例
示例 #1 uopz_undefine() example
<?php
define("MY", true);
uopz_undefine("MY");
var_dump(defined("MY"));
?>以上示例会输出：
bool(false)
add a note
User Contributed Notes
There are no user contributed notes for this page.
