源自：4-5 PHP-如何判定常量是否被定义
右边显示：Notice: Undefined variable: is1 in /808/RSu/index.php on line 6 NULL Notice: Undefined variable: is2 in /808/RSu/index.php on line 7 NULL
Notice: Undefined variable: is1 in /808/RSu/index.php on line 6
NULL
Notice: Undefined variable: is2 in /808/RSu/index.php on line 7
NULL
提问者：乾坤龙心
2015-02-16 00:18