[英]JQuery and AJAX form validation not working
我对 Javascript 和 PHP 还很陌生,但需要对用户注册进行表单验证,而且我在将新用户插入数据库时遇到了问题。 我通过 JQuery 的验证插件在客户端验证表单,并尝试将请求发送到我通过 AJAX 检查用户可用性的数据库。 验证插件可以工作,但是当我通过 AJAX 请求数据库条目时出现问题,因为如果我按下表单中的“发送”按钮,我会在屏幕上收到Error occurred
警报。
我的 registration.html 代码:
<form id="form" name="registration" action="" method="POST">
<label for="user_name">Nickname:</label><br>
<input type="input" size="40" maxlength="10" name="user_name" id="user_name" placeholder="Nickname"><br><br>
<label for="user_email">Email:</label><br>
<input type="email" size="40" maxlength="20" name="user_email" id="user_email" placeholder="Email address"><br><br>
<label for="user_password">Password:</label><br>
<input type="password" size="40" maxlength="50" name="user_password" id="user_password" placeholder="Passwort"><br>
<label for="confirmed_password">Confirm password:</label><br>
<input type="password" size="40" maxlength="50" name="confirmed_password" id="confirmed_password" placeholder="Passwort bestätigen"><br><br>
<input type="submit" name="register" value="Send">
</form>
<script src="./form_validation.js"></script>
我的 form_validation.js 代码:
$("#form[name='registration']").validate({
rules: {
user_name: {
required: true
},
user_email: {
required: true,
email: true
},
user_password: {
required: true,
minlength: 7
},
confirmed_password: {
required: true,
equalTo: "#user_password"
}
},
messages: {
user_name: 'Enter a nickname.',
user_email: {
required: 'Enter your email address.',
email: 'Enter a valid email address.',
},
user_password: {
required: 'Enter a password.',
minLength: 'At least 7 characters.',
},
confirmed_password: {
required: 'Confirm password.',
equalTo: 'Passwords have to match.',
}
},
submitHandler: function (form) {
$.ajax({
url:'./user.php',
type: "post",
data: $(form).serialize(),
success: function() {
alert("success");
console.log();
$("#result").html('Submitted');
},
error: function() {
alert("Error occured");
console.log();
$("#result").html('An error occured while submitting.');
}
});
}
});
});
我的 user.php 代码:
<?php
require_once __DIR__ . "./connection.php";
if (isset($_POST["register"]) && isset($_POST['user_name']) && isset($_POST['user_email']) && isset($_POST['user_password']) && isset($_POST['confirmed_password']))
{
$user_name = $_POST['user_name'];
$user_email = $_POST['user_email'];
$user_password = $_POST['user_pasword'];
$db = new DB_connection;
$sql = "SELECT * FROM user WHERE user_name = :user_name OR user_email = :user_email";
$statement = $db->conn->prepare($sql);
$statement->bindParam("user_name", $user_name);
$statement->bindParam("user_email", $user_email);
if ($statement->execute())
{
$sql = "INSERT INTO user (user_name, user_pass, user_email) VALUES (:user_name, :user_password, :user_email)";
$stmt = $db->conn->prepare($sql);
$stmt->bindParam(":user_name", $user_name);
$stmt->bindParam(":user_password", $user_password);
$stmt->bindParam(":user_email", $user_email);
if ($stmt->execute()) {
echo "New user inserted";
} else {
echo "Something went wrong!";
}
} else {
echo "Error!";
}
}
找到了解决办法。 我只需要替换include_once __DIR__ './connection.php';
使用include_once __DIR__ '/../config/config.php';
. 奇怪的是没有出现 MYSQL 错误消息,其他类在没有include_once
语句的情况下工作。
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