每个标题重定向后都有一个echo。但它没有弹出。因此,当用户输入无效的登录详细信息时,不会弹出任何消息。我究竟做错了什么? 我也尝试了一种JavaScript方法,但没有设法解决问题。 是否与我的嵌套ifs有关?
<?php
session_start();
#first if
if (isset($_POST['submit'])) {
include 'dbh.inc.php';
$uid = mysqli_real_escape_string( $conn , $_POST['uid'] );
$pwd = mysqli_real_escape_string( $conn , $_POST['pwd'] );
//Error handlers
//Check if this input are empty
#second if
if (empty($uid) || empty($pwd)) {
header("Location: ../index.php?login=empty");
exit();
}/*second else*/ else {
$sql = "SELECT * FROM users WHERE user_uid='$uid' OR user_email='$uid'";
$result = mysqli_query($conn,$sql);
$resultCheck = mysqli_num_rows($result);
#third if
if ($resultCheck < 1) {
header("Location: ../index.php?login=error");
echo "Login error";
exit();
}/*third else*/ else {
#forth if
if ($row = mysqli_fetch_assoc($result)) {
//de-hashing the password
$hashedPwdCheck = password_verify($pwd , $row['user_pwd']);
#fifth if
if ($hashedPwdCheck == false) {
header("Location: ../index.php?login=error");
echo "Login error";
exit();
} /*fifth else*/ elseif ($hashedPwdCheck == true) {
//Log in the user here
$_SESSION['u_id'] = $row['user_id'];
$_SESSION['u_first'] = $row['user_first'];
$_SESSION['u_last'] = $row['user_last'];
$_SESSION['u_email'] = $row['user_email'];
$_SESSION['u_uid'] = $row['user_uid'];
$uid = $_SESSION['u_id'];
header("Location: ../index.php?login=success");
echo "Login error";
exit();
}
}
}
}
}/*first else*/ else {
header("Location: ../index.php?login=error");
echo "Login error";
exit();
}
?>
答案 0 :(得分:0)
如果使用location
标题,则永远不会显示消息 - 浏览器会忽略请求的其余部分并立即进行重定向,因为HTTP代码更改为302.
即使您可以显示消息,对用户来说也不是一个好的体验,因为它只会显示几分之一秒,然后重定向将发生,页面将被覆盖。您应该在登录页面上显示错误消息(index.php?login = error)。