本文实例为大家分享了php用户登录身份验证的具体代码，供大家参考，具体内容如下
一、代码
conn.php
<?php
$conn = new com("adodb.connection");
$connstr="driver={microsoft access driver (*.mdb)}; dbq=". realpath("data/db_database07_188.mdb");
$conn->open($connstr);
?>
index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>用户身份验证</title>
<link rel="stylesheet" type="text/css" href="css/style.css" rel="external nofollow" >
<style type="text/css">
<!--
.STYLE1 {color: #FFFFFF}
-->
</style>
</head>
<body>
<table width="250" border="0" align="center" cellpadding="1" cellspacing="0">
<tr>
<td height="75" bgcolor="#0099CC"><table width="250" height="75" border="0" cellpadding="0" cellspacing="1">
<form name="form1" method="post" action="index.php">
<tr>
<td height="25" colspan="2" bgcolor="#0099CC"><div align="center" class="STYLE1">用户身份验证</div></td>
</tr>
<tr>
<td width="60" height="25" bgcolor="#FFFFFF"><div align="center">用户名：</div></td>
<td width="187" bgcolor="#FFFFFF"><div align="left"> <input type="text" name="username" size="22" class="inputcss"></div></td>
</tr>
<tr>
<td height="25" bgcolor="#FFFFFF"><div align="center">密码：</div></td>
<td height="25" bgcolor="#FFFFFF"><div align="left"> <input type="password" name="userpwd" size="22" class="inputcss"></div></td>
</tr>
<tr>
<td height="25" colspan="2" bgcolor="#FFFFFF"><div align="center"><input name="submit" type="submit" value="登录" class="buttoncss"></div></td>
</tr>
</form>
</table></td>
</tr>
</table>
<?php
if($_POST[submit]!="")
{
$username=$_POST[username]; //接收提交的用户名
$userpwd=$_POST[userpwd]; //接收提交的密码
if(trim($username)==""||trim($userpwd)=="")
{
echo "<script>alert('请输入用户名或用户密码!');history.back();</script>";
exit;
}
class chk //定义密码验证类
{
private $name; //定义用户名属性
private $pwd; //定义密码属性
public function __construct($x,$y) //构造函数，对类的属性初始化
{
$this->name=$x;
$this->pwd=$y;
}
public function chkuser() //验证用户身份
{
include_once("conn.php");
$rs=new com("adodb.recordset"); //创建记录集对象
$rs->open("select * from tb_user where username='".$this->name."' and userpwd='".$this->pwd."'",$conn,3,1);
if($rs->eof || $rs->bof)
{
echo "<script>alert('对不起，密码或用户名错误!');history.back();</script>";
exit;
}
else
{
echo "<script>alert('恭喜您登录成功!');history.back();</script>";
exit;
}
}
}
$chk1=new chk($username,$userpwd); //对密码验证类进行实例化
$chk1->chkuser(); //调用chkuser()方法验证用户身份
}
?>
</body>
</html> 二、运行结果
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。