Question

我目前正在尝试通过ajax将表单数据发送到php函数，但它似乎没有发送它。

这是HTML表单：

<form onSubmit="return registration();" id="registration_form">
    <input type="email" id="email_address" name="email_address" class="inputTextFooter">
    <input src="images/go.png" alt="Go" type="submit">
</form>

AJAX：

function registration(){
    if(!$('#email_address').val()){
        alert("Empty");
    }
    else {
        $.ajax( {
            type: "POST",
            url: "includes/registration_check.php",
            data: $('#registration_form').serialize(),
            success: function( response ) {
                alert( response );
            }
        });
    }
    return false;
};

最后是PHP：

$user_id = NULL;
$user_email = isset($_POST['email_address']) ? $_POST['email_address'] : '';
$distinct_query = "SELECT distinct user_email FROM user_emails";

$result=mysql_query($distinct_query, $connection);
$rows = mysql_num_rows($result) - 1;
$distinct_result_array = array();
while($fetched_array = mysql_fetch_assoc($result)) 
{
    $distinct_result_array[] = $fetched_array;
}

for ($loop = 0; $loop <= $rows; $loop++) { 
    if (in_array($user_email, $distinct_result_array[$loop])) {
        echo "Email taken.";
        break;
    }
    else{

    }
}

$query = "INSERT INTO user_emails (user_id, user_email) VALUES ('".$user_id."', '".$user_email."')";
        mysql_query($query, $connection);
        echo "You have successfully registered and will be checked by administration.";

当我发送表单时，它会添加到数据库，但电子邮件字段为空。

Answer 1

替换

$user_email = isset($_POST['email_address']) ? $_POST['email_address'] : '';

使用

if(empty($_POST['email_address']))
{
echo "error";
exit;
}
else
{
$user_email = $_POST['email_address'];
}

我建议你使用mysqli而不是mysql，在插入数据库之前验证用户输入。

Answer 2

您的函数应event.preventDefault()限制默认表单提交操作然后只有你的ajax请求被触发。

function registration(){
event.preventDefault();
    if(!$('#email_address').val()){
        alert("Empty");
    }
    else {
        $.ajax( {
            type: "POST",
            url: "includes/registration_check.php",
            data: $('#registration_form').serialize(),
            success: function( response ) {
                alert( response );
            }
        });
    }
    return false;
};

Answer 3

我认为您可能需要使用PHP的parse_str（）函数来获取序列化数据

http://php.net/manual/en/function.parse-str.php

AJAX不发送帖子数据

3 个答案: