php面向对象的用户登录身份验证

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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"><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">&nbsp;<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">&nbsp;<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><?phpif($_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

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