php登录系统身份验证

login.html

<form id="form1" name="form1" method="post" action="checklogin.php">
<table width="400">
<tr>
<th width="27%" scope="row">用户名</th>
<td width="73%"><input name="user_name" type="text" id="user_name" /></td>
</tr>
<tr>
<th scope="row">密码</th>
<td><input name="user_pwd" type="password" id="user_pwd" /></td>
</tr>
<tr>
<th scope="row">请填写答案 </th>
<td><input name="yzm" type="text" id="yzm" size="5" />
123</td>
</tr>
<tr>
<td colspan="2" scope="row"><div align="center">
<input type="submit" name="Submit" value=" 登录 " />
</div></td>
</tr>
</table>
</form>

checklogin.php

<?php
session_start();
require_once("../include/class/Mysql.class.php");
require_once("../include/class/FuncAdmin.class.php");
require_once("../include/class/Users.class.php");

$db = new Mysql();
$db->getConnection(1);
$db->select_db();
$db->query("set names gb2312");

$f = new FuncAdmin();

if(!empty($_POST['Submit'])){
//判断登录
$user_name = $_POST['user_name'];
$user_pwd = $_POST['user_pwd'];
$yzm = $_POST['yzm'];

//加强验证
//此处很重要但没写出呢cxmcook

if(empty($user_name) || empty($user_pwd)){
$f->alert_back("用户名与密码不能为空！");
}

$user = new Users();
$sql = $user->get_select_sql(" where user_name='".$user_name."' and user_pwd='".$user_pwd."' ");
$rs = $db->query($sql);
$row = $db->fetch_array($rs);
//var_dump($row);
//die("<hr>");
$rownum = $db->num_rows($rs);
//die('=========='.$rownum);
if( $rownum >0 ){
//$row = $db->fetch_array($rs);
$_SESSION['admin'] = 'admin';

$_SESSION['user_id'] = $row['user_id'];
$_SESSION['user_name'] = $row['user_name'];
$_SESSION['user_realname'] = $row['user_realname'];
$_SESSION['user_last_logintime'] = $row['user_last_logintime'];
$_SESSION['user_last_loginIp'] = $row['user_last_loginIp'];
$_SESSION['user_loginnum'] = $row['user_loginnum'];

//header("Location:index.php");
echo "<script>
alert('登录成功！".$_SESSION['user_realname']."');
location='index.php';
</script>";

}else{
$f->admin_tip("用户名或密码错误！");
}

}

?>

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