<?php $uname=$_POST["username"]; $pwd=$_POST["password"]; $link = mysql_connect('localhost', 'root', '123456') or die('Could not connect: ' . mysql_error()); mysql_select_db('ruida') or die('Could not select database'); // 执行 SQL 查询 $query = 'SELECT * FROM user'; $result = mysql_query($query) or die('Query failed: ' . mysql_error()); while($row=mysql_fetch_array($result)){ if($uname==$row['username'] && $pwd==$row['password']) { //页面跳转 } else echo 'error!';} // 释放结果集 mysql_free_result($result); // 关闭连接 mysql_close($link); ?>