我正在尝试设置一个用户登录页面（我学习 php 时的基本培训），但该页面无法正常工作，因为我认为我在计算行数的部分存在问题（我检查了我的行数输入的登录名和密码与已输入的匹配的用户表数据库=1）。
我在 PDO 中，我不想使用mysql_num_rows已弃用的，或者至少建议不要使用它。相反，我想使用Found_rows
这是我的 login_page.php：
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head>
<title>LOGIN PAGE</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
</head>
<body>
<h1>Connect to your account</h1>
<form method="post" action="login_verify.php">
<input type="text" name="inputed_username" size="35" maxlength="30" required="required" value="Enter your login" /><br/><br/>
<input type="password" name="inputed_password" size="35" maxlength="30" required="required" value="Enter your password" /><br/><br/>
<input type="submit" name="submit "value="Connect me !" />
</form>
</body>
</html>
然后是 php 文件，我在该文件中检查{login,password}此 login_verify.php 文件中输入的内容是否正确：
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head>
<title>login process check-up</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
</head>
<body>
<?php
if (isset($_POST['submit']))//if the button submit has not been clicked on
{
try
{
//database connection
$dbhost = "localhost";
$dbname = "test";
$dbuser = "root";
$dbpass = "";
$pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
$bdd = new PDO("mysql:host=$dbhost;dbname=$dbname; charset=UTF8",$dbuser,$dbpass,$pdo_options);
$bdd -> query('SET NAMES utf8');
//the database is checked to see if there is a match for the couple {user,password}
$user = $_POST['inputed_username'];
$password = $_POST['inputed_password'];
//preparaiton and execution of the request
$req = $bdd->prepare('SELECT * from user_table WHERE login= :login && password= :password LIMIT 1');
$req->execute(array(
'login' => $user,
'password' => $password));
$foundrows = $req->query("SELECT FOUND_ROWS()")->fetchColumn();//the number of rows are counted
//we check if there is a match for the login-password
if ($foundrows == 1)//if we find one that matches
{
session_start();
$_SESSION['username'] = $req['login'];
$_SESSION['fname'] = $req['first_name'];
$_SESSION['lname'] = $req['last_name'];
$_SESSION['logged'] = TRUE;
header("Location: first_page.php");
exit();
}
else //if we don't find any match
{
header("Location: login_page.php");
exit;
}
}
catch (Exception $e)
{
die('Erreur: '.$e->getMessage());
}
}
else //if the submit button has not been clicked on
{
header ("Location: login_page.php");
exit;
}
?>
如果你们中的任何人知道问题出在哪里，那就太好了。
我认为它来自对found_rows的滥用。这是我第一次使用它，所以我觉得我的东西很糟糕，但我不知道它是什么。