聊天室phpmysql(五)

第五个页面name="changenick.php" <? include "../signup/mysql.php"; //echo $userid; if($action=="ok") { $sql="select * from chat_user_list where userid=’$nick’"; $result=mysql_query($sql) or die(mysql_error()); if(!$result) echo "该呢称已被他人占用 请重新填写"; else { $sql="update chat_user_list set id=’$nic