我正在尝试创建一个登录页面,其中,每次登录的尝试都会立即在页面上完成;而不是刷新页面。谷歌如何登录页面以及Facebook如何在不刷新的情况下提交消息的方式。
我已经用PHP编写了页面的后端功能,现在我想给它更多的东西,让它外观和功能异常。
这是我正在使用的当前Ajax脚本,它不希望以我希望的方式工作(我尝试了多个具有相同结果的其他脚本):
<script>
$(function () {
$('#_js_pdTr1').on('submit', function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: 'login_push.php',
data: $('#_js_pdTr1').serialize(),
});
});
});
</script>
这是页面的表单:
<form id="_js_pdTr1" action="" method="post">
<h3>LOGIN</h3>
<div class="err-disp-out">
<?php
if(!empty($errors)){
echo output_errors($errors);
}
?>
</div>
<input type="text" name="username" placeholder="Username"><br><br>
<input type="password" name="password" placeholder="Password"><br><br>
<input id="remember" type="checkbox" name="remember_me"><label for="remember">Remember Me</label><br><br>
<button id="_js_pdTr2" type="submit">Login</button>
</form>
在我的login_push.php
页面上,这是PHP:
include 'core/init.php';
logged_in_protect();
$user = $_POST['username'];
$pass = $_POST['password'];
$user = preg_replace("/[^a-z0-9_\s-]/", "", $user);
$user = preg_replace("/[\s-]+/", " ", $user);
$user = preg_replace("/[\s_]/", "-", $user);
if(!empty($_POST)){
if(isset($user) && isset($pass)) {
$result = mysqli_query($conn, "SELECT * FROM users WHERE username = '$user'");
if(mysqli_num_rows($result) == 0) {
$errors[] = 'The username or password are incorrect.';
} else {
$passR = mysqli_query($conn, "SELECT * FROM users WHERE username = '$user'");
while($row = mysqli_fetch_array($passR)){
$dbHash = $row['password'];
if(password_verify($pass, $dbHash)){
$activeQ = mysqli_query($conn, "SELECT active FROM users WHERE username = '$user'");
while($row = mysqli_fetch_array($activeQ)){
$active = $row['active'];
if($active == 0){
$errors[] = 'This user has not activated their account.';
} else {
$remember_me = ($_POST['remember_me'] == "on") ? 1 : 0;
if(isset($_POST['remember_me']) && $remember_me == 1){
$_SESSION['user_log'] = time() + 7889238;
} else {
$_SESSION['user_logi'] = time() + 3600;
}
$_SESSION['user_id'] = $user;
header('location: ./user');
}
}
} else {
$errors[] = 'The username or password are incorrect.';
}
}
}
} else {
header('location: ./');
}
}
差不多,我想要的是:
提交表单后,它会将表单中的所有数据推送到login_push.php
页面,该页面上的PHP将继续运行。
它将查询数据库并将信息发送回原始页面,如果变量$errors
不为空,它将自动在页面上回显它(在form code block
的第6行上回显) ,无需刷新页面。但是,如果变量为空,则会将它们记录下来!
感谢所有帮助,
干杯!
编辑:我已经测试了其他代码,但是,它没有按照我希望的方式工作。
答案 0 :(得分:2)
请勿在您的ajax中使用header('location: ./user');
。你有一些重复的代码,比如$result = mysqli_query($conn, "SELECT * FROM users WHERE username = '$user'");
你为什么不只调用一次?
您很容易受到mysql注入,因为您没有转义变量。
您从$username
设置了$_POST
,之后您检查了isset($_POST)
,为什么会这样?
无论如何,您需要使用error
和message
键来回显成功/失败或JSON对象。
$result = [
'error' => 0,
'message' => ''
];
//You can do other validations here
if (!empty($_POST)) {
//Do the dbhash here
$sql = "SELECT COUNT(*) AS cnt FROM `users` WHERE `username` = '" . mysqli_real_query($conn, $_POST["username"]) . "' AND `password` = '" . password_verify($_POST['pass'], $dbHash) . "'";
$res = mysqli_query($conn, $sql);
$row = mysqli_fetch_row($res);
if ($row['cnt'] < 1) {
$result = [
'error' => 1,
'message' => 'Bad username or password'
];
}
//You can add success message if you want
}
echo json_encode($result);
在你的javascript中:
$.ajax({
type: 'post',
url: 'login_push.php',
data: $('#_js_pdTr1').serialize(),
success: function(response) {
if (response.error != 0) {
//Show error here
} else {
window.location.href = './user'; //Better to use absolute path here
}
}
},'json');