第一次接触这种查了好久也不会 =-PHP Tutorial-php.cn

第一次接触这种查了好久也不会 =

WBOY

Release： 2016-06-23 13:42:50

Original

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<?phpsession_start(); class chkuserlogin{     private $username;	private $password;        	public function __construct($username,$password){	   $this->username=$username;	   $this->password=$password;	   		  	   require_once("connn.php");	   $sql=mysql_query("select account from root where username='".$this->username."' and password='".$this->password."'",$conn);       $info=mysql_fetch_array($sql);	   if($info==false){	     echo "<script>alert('用户名或密码输入错误！');history.back();</script>";	     exit;	   }else{	     if($_SESSION["unc"]!=""){		   session_unregister("unc");		 } 		 session_register("unc");		 $_SESSION["unc"]=$this->username; 		 mysql_query("update root set logintimes=logintimes+1,lastlogintime='".date("Y-m-d H:i:s")."'",$conn);	     echo "<script>alert('登录成功！');window.location.href='login.php';</script>"; 	    }	  } }  $obj=new chkuserlogin($_POST["username"],md5($_POST["password"]));  $obj->chk();?>

Copy after login

登录验证的一小段代码我数据库为 localhost root 无密码，我数据库已保存了一组密码。无限密码错误跳转页面而且也报错

= - 求解脱拜谢

回复讨论(解决方案)

$sql=mysql_query("select account from root where username='".$this->username."' and `password`='".$this->password."'",$conn);//17行password外面加``，与mysql函数冲突

Copy after login

请两个错误是在这句出现的
$obj=new chkuserlogin($_POST["username"],md5($_POST["password"]));

你可能不是在 post 方式下执行的程序
也可能提交过来的名字不对

var_dump($_POST);

= - 各位大神我还是不知道怎么改新手没学几天

你是怎么执行这个程序的

<!DOCTYPE html><html lang="en">  <head>    <meta charset="utf-8" />    <title>Administrator</title>                   <link href="./css/bootstrap.min.css" rel="stylesheet" />    <link href="./css/bootstrap-responsive.min.css" rel="stylesheet" />            <link href="./css/font-awesome.css" rel="stylesheet" />        <link href="./css/adminia.css" rel="stylesheet" />     <link href="./css/adminia-responsive.css" rel="stylesheet" />         <link href="./css/pages/login.css" rel="stylesheet" />     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><form name="connForm" method="post" action="conn.php" onSubmit="return InputCheck(this)">  <body>	<div class="navbar navbar-fixed-top">		<div class="navbar-inner">				<div class="container">						<a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse"> 				<span class="icon-bar"></span> 				<span class="icon-bar"></span> 				<span class="icon-bar"></span> 							</a>						<a class="brand" href="./"> Admin</a>						<div class="nav-collapse">										</div> <!-- /nav-collapse -->					</div> <!-- /container -->			</div> <!-- /navbar-inner -->	</div> <!-- /navbar --><div id="login-container">			<div id="login-header">				<h3>欢迎登陆用户保用注册后台</h3>			</div> <!-- /login-header -->		<div id="login-content" class="clearfix">		 				<fieldset>					<div class="control-group">						<label class="control-label" for="username">用户名：</label>						<div class="controls">							<input type="text" class="" id="username" />						</div>					</div>					<div class="control-group">						<label class="control-label" for="password">密码：</label>						<div class="controls">							<input type="password" class="" id="password" />						</div>					</div>				</fieldset>								<div id="remember-me" class="pull-left">					<input type="checkbox" name="remember" id="remember" />					<label id="remember-label" for="remember">Remember Me</label>				</div>								<div class="pull-right">					<button type="submit" class="btn btn-warning btn-large">						Login					</button>				</div>			</form>					</div> <!-- /login-content -->							</div> <!-- /login-wrapper -->    <!-- Le javascript================================================== --><!-- Placed at the end of the document so the pages load faster --><script src="./js/jquery-1.7.2.min.js"></script><script src="./js/bootstrap.js"></script>  </body></html> = - 用这个 页面

Copy after login

<?phperror_reporting(0);$mysql_servername = "localhost"; //主机地址$mysql_username = "root"; //数据库用户名$mysql_password =""; //数据库密码$mysql_database ="root"; //数据库mysql_connect($mysql_servername , $mysql_username , $mysql_password);mysql_select_db($mysql_database); $username=$_POST['username'];$passowrd=$_POST['password'];if ($username && $passowrd){ $sql = "SELECT * FROM account WHERE username = '$username' and password='$passowrd'"; $res = mysql_query($sql); $rows=mysql_num_rows($res);  if($rows){   header("refresh:0;url=login.php");//跳转页面，注意路径   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>";}?>

Copy after login

我重新写了这个代码不用那个链接的这个没报错了但是无限用户名密码不能为空不管怎么输入

<!DOCTYPE html><html lang="en">  <head>    <meta charset="utf-8" />    <title>Administrator</title>                   <link href="./css/bootstrap.min.css" rel="stylesheet" />    <link href="./css/bootstrap-responsive.min.css" rel="stylesheet" />            <link href="./css/font-awesome.css" rel="stylesheet" />        <link href="./css/adminia.css" rel="stylesheet" />     <link href="./css/adminia-responsive.css" rel="stylesheet" />         <link href="./css/pages/login.css" rel="stylesheet" />     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><form name="connForm" method="post" action="conn.php" onSubmit="return InputCheck(this)">  <body>	<div class="navbar navbar-fixed-top">		<div class="navbar-inner">				<div class="container">						<a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse"> 				<span class="icon-bar"></span> 				<span class="icon-bar"></span> 				<span class="icon-bar"></span> 							</a>						<a class="brand" href="./"> Admin</a>						<div class="nav-collapse">										</div> <!-- /nav-collapse -->					</div> <!-- /container -->			</div> <!-- /navbar-inner -->	</div> <!-- /navbar --><div id="login-container">			<div id="login-header">				<h3>欢迎登陆用户保用注册后台</h3>			</div> <!-- /login-header -->		<div id="login-content" class="clearfix">		 				<fieldset>					<div class="control-group">						<label class="control-label" for="username">用户名：</label>						<div class="controls">							<input type="text" class="" id="username" />						</div>					</div>					<div class="control-group">						<label class="control-label" for="password">密码：</label>						<div class="controls">							<input type="password" class="" id="password" />						</div>					</div>				</fieldset>								<div id="remember-me" class="pull-left">					<input type="checkbox" name="remember" id="remember" />					<label id="remember-label" for="remember">Remember Me</label>				</div>								<div class="pull-right">					<button type="submit" class="btn btn-warning btn-large">						Login					</button>				</div>			</form>					</div> <!-- /login-content -->							</div> <!-- /login-wrapper -->    <!-- Le javascript================================================== --><!-- Placed at the end of the document so the pages load faster --><script src="./js/jquery-1.7.2.min.js"></script><script src="./js/bootstrap.js"></script>  </body></html> = - 用这个 页面

Copy after login

你的用户名和密码没有提交过去啦

红色框框分别加上
name="username"
name="password"
再试试

非常感谢各位的帮助让我在这条路上不至于不知道如何继续问题已解决