(PECL uopz 1, PECL uopz 2, PECL uopz 5, PECL uopz 6)
uopz_redefine — Redefine a constant
 Redefines the given constant as value
  
classThe name of the class containing the constant
constantThe name of the constant
valueThe new value for the constant, must be a valid type for a constant variable
   成功时返回 TRUE, 或者在失败时返回 FALSE。
  
Example #1 uopz_redefine() example
<?php
define("MY", 100);
uopz_redefine("MY", 1000);
echo MY;
?>
以上例程会输出:
1000