这种题目是比较简单地。。直接写个小脚本就行了2333
<?php $a=" a1zLbgQsCESEIqRLwuQAyMwLyq2L5VwBxqGA3RQAyumZ0tmMvSGM2ZwB4tws"; $a=str_rot13($a); $a=strrev($a); $a=base64_decode($a); function decode233($str) { $b=""; for($test=0;$test<strlen($str);$test++) { $b=$b.(chr(ord($str[$test])-1)); } return $b; } echo strrev(decode233($a)); ?>