改用一下的正则表达式 !preg_match("/^[a-z0-9\x{4e00}-\x{9fa5}\:\;\.\,\?\!\@\#\$%\^\*\"\~\'+=\\\ &_\/\.\[\]-\}\{]+$/iu", $str) 修改 Input.php 或者创建自己的 MY_Input.php ， 如下： <?php class MY_Input extends CI_Input { /** * Clean Keys * * This is a helper function. To prevent malicious users * from trying to exploit keys we make sure that keys are