我试图检查登录表单中是否存在用户名和密码字段。

问题是if (!empty ($_POST)) 代码不会对我这样做。

UPDATE:

if (isset($_POST[\'submit-btn\'])) {

    //Sanitize POST Array
    $POST = filter_var_array($_POST, FILTER_SANITIZE_STRING);

    $username = $POST[\'username\'];
    $password = $POST[\'password\'];

    if(empty($username)) {
        echo "Username o email non inserita"; 
        return false;
    }

    if(empty($password)) {
        echo "Password non inserita"; 
        return false;
    }

    if($username && $password) {

        $login_array = array();
        $login_array[\'user_login\'] = $username;
        $login_array[\'user_password\'] = $password;

        $verify_user = wp_signon($login_array, true);
        if (!is_wp_error($verify_user)) {
            echo "<script>window.location = \'" . site_url() . "\'</script>";
        } else {
            echo \'Credenziali non valide!\';
        }
    }
}

相反，这是同一页面上的登录表单，即“我的登录”。php页面：

<form id="wp_login_form" action="/login/" method="post">
    <label class="my-username" >Username o Email</label>
    <input type="text" name="username" class="info-login" value="" placeholder="[email protected]">
    <label class="my-password" >Password</label>
    <input type="password" name="password" class="info-login" value="" placeholder="******">
    <label> 
    <input class="myremember" name="rememberme" type="checkbox" value="forever"><span class="hey">Remember me</span>
    </label> 
    <button type="submit" id="submitbtn" name="submit-btn" value="Login">Login</button>
</form>

非常感谢那些帮助我的人。顺致敬意，

if (isset($_POST[\'submit-btn\'])) {
    $username = filter_var($_POST[\'username\'], FILTER_SANITIZE_STRING);
    $password = filter_var($_POST[\'password\'], FILTER_SANITIZE_STRING);
    if(empty($username))
    {
        echo "Username empty"; return false;
    }
    if(empty($password))
    {
        echo "Password empty"; return false;
    }

    if($username && $password)
    {
        $login_array = array();
        $login_array[\'user_login\'] = $username;
        $login_array[\'user_password\'] = $password;

        $verify_user = wp_signon($login_array, true);
        if (!is_wp_error($verify_user)) {
            echo "<script>window.location = \'" . site_url() . "\'</script>";
        } else {
            echo \'Credenziali non valide!\';
        }
    }
}