php 用户登录代码

时间：2015-01-23 来源：西部数据作者：西部数据

<?php

error_reporting(0);

if(isset($_post['post']) && $_post['post']=="1"){

$mysql_servername = "localhost";

$mysql_username = "root";

$mysql_password ="";

$mysql_database ="peng";

mysql_connect($mysql_servername , $mysql_username , $mysql_password);

mysql_select_db($mysql_database);

$name=$_post['name'];

$passowrd=$_post['password'];

//开源代码phpfensi.com

if ($name && $passowrd){

$sql = "select * from liuyanban where name = '$name' and password='$passowrd'";

$res = mysql_query($sql);

$rows=mysql_num_rows($res);

  if($rows){

  header("refresh:0;url=a.htm");

  exit;

}

echo "<script language=javascript>alert('用户名密码错误');history.back();</script>";

}else {

echo "<script language=javascript>alert('用户名密码不能为空');history.back();</script>";

}

}else{

?>

<html>

<body>

<form name="login" action="login.php" method=post>

<input type=hidden name="post" value=1>

用户名<input type=text name="name">

<p>密码<input type=password name="password">

<p>

<input name="log" type=submit value="登录">

</form>

</body>

</html>

<?php } ?>