Question

我正在尝试使用以下代码登录用户。

该代码似乎可以正常工作，并且用户登录正常。但是，当我要求它回显带有用户ID（仅数字）的MYSQL结果时，我得到以下结果：

x 111

在我的数据库中找不到字母x，我正在尝试使用它：

preg_replace("/[^0-9]/", "", $row['user_id']);

摆脱x，但无法正常工作，字母x仍然保留。

请有人可以告诉我我要去哪里了吗

<?php  ob_start();
require 'connect.php'; 
if(!isset($_SESSION)) { 
    session_start(); }

    if($_SERVER["REQUEST_METHOD"] == "POST") {
        // username and password sent from form 

        $myusername = mysqli_real_escape_string($mysqli,$_POST['username']);
        $mypassword = mysqli_real_escape_string($mysqli,$_POST['password']); 

        $sql = "SELECT user_id FROM user_data WHERE username = '$myusername' and password = '$mypassword'";
        $result = mysqli_query($mysqli,$sql);
        $row = mysqli_fetch_array($result,MYSQLI_ASSOC);
        //$active = $row['loggedIn'];

        $count = mysqli_num_rows($result);

        // If result matched $myusername and $mypassword, table row must be 1 row

        if($count == 1) {
            if (!isset($_SESSION["myusername"])) {

                $_SESSION['login_user'] = preg_replace("/[^0-9]/", "", $row['user_id']);
                 $res = $_SESSION['login_user'];
                 $sql = "UPDATE user_data SET loggedIn='True' WHERE username = '$myusername'";
                 echo $res;
                 //header('Location: ' . $_SERVER['HTTP_REFERER']);
                 die;

            }else {
                echo "Your Login Name or Password is invalid";
        }
    } 
}
?>

<script>
    if ( window.history.replaceState ) {
        window.history.replaceState( null, null, window.location.href );
    }
</script>




<div class="form">
<h1>Log In</h1>
<form action="" method="post" name="login">
<input type="text" name="username" placeholder="Username" class="lg_box" required />
<input type="password" name="password" placeholder="Password" class="lg_box"required />
<input name="submit" type="submit" value="Login" />
</form>
<p>Not registered yet? <a href='registration.php'>Register Here</a></p>
</div>


<style>

    .lg_box {
        width:100%;
        height:35px;
        border:1px solid #ccc;
        margin-top:10px;
        border-radius: 4px;
        padding:10px;
        margin-bottom:20px;


    }    
</style>

奇怪的“ X”字符被MYSQL结果回显了吗？

0 个答案: