我的联系表单正在工作，但它没有显示成功消息

我的联系人表单正在工作，但没有显示成功消息。另一个开发人员写了PHP代码，但我做了一些jQuery，它不会显示我的消息。我很确定问题出在jQuery上。我对这行代码特别困惑…

 $("#result").hide().html(output).slideDown();
            }, 'json');
        }

我认为你会想要使用。show()，因为#result需要显示html，但似乎没有做到这一点。完整的代码如下。

$(function(){
    $(".btn").click(function() {
        //get input field values
        var user_name       = $('input[name=name]').val(),
            user_email      = $('input[name=email]').val(),
            user_message    = $('textarea[name=message]').val(),
            proceed = true;
        //simple validation at client's end
        //we simply change border color to red if empty field using .css()
        if(user_name===""){
            $('input[name=name]').css('border','2px solid red').after('<p class="error-msg">(What''s your name?)</p>');
            proceed = false;
        }
        if(user_email===""){
            $('input[name=email]').css('border','2px solid red').after('<p class="error-msg">(Please provide a valid email)</p>');
            proceed = false;
        }
        if(user_message==="") {
            $('textarea[name=message]').css('border','2px solid red').after('<p class="error-msg">(Please let me know what your inquiry is about)</p>');
            proceed = false;
        }
        //everything looks good! proceed...
        if(proceed)
        {
            //data to be sent to server
            post_data = {'userName':user_name, 'userEmail':user_email, 'userMessage':user_message};
            //Ajax post data to server
            $.post('../../contact-form.php', post_data, function(response){
                //load json data from server and output message
                if(response.type === 'error')
                {
                    output = '<div class="error">'+response.text+'</div>';
                }else{
                    output = '<div class="success">'+response.text+'</div>';
                    alert('Thanks for the message');
                    //reset values in all input fields
                    $('.form-container input').val('');
                    $('.form-container textarea').val('');
                }
                $("#result").hide().html(output).slideDown();
            }, 'json');
        }
    });
    //reset previously set border colors and hide all message on .keyup()
    $(".form-container input, .form-container textarea").keyup(function() {
        $(".form-container input, .form-container textarea").css('border-color','');
        $("#result").slideUp();
    });
});

<?php
 if($_POST)

{$to_Email = "alexechaparro@gmail.com";//替换为收件人的邮箱地址$subject = 'alexsdogvacay.com';//邮件主题

//check if its an ajax request, exit if not
if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
    //exit script outputting json data
    $output = json_encode(
    array(
        'type'=>'error',
        'text' => 'Request must come from Ajax'
    ));
    die($output);
}

var_dump($_REQUEST);
//check $_POST vars are set, exit if any missing
if(!isset($_POST["userName"]) || !isset($_POST["userEmail"]) || !isset($_POST["userMessage"]))
{
    echo $_POST["userName"];
    $output = json_encode(array('type'=>'error', 'text' => 'Input fields are empty!'));
    die($output);
}
//Sanitize input data using PHP filter_var().
$user_Name        = filter_var($_POST["userName"], FILTER_SANITIZE_STRING);
$user_Email       = filter_var($_POST["userEmail"], FILTER_SANITIZE_EMAIL);
$user_Message     = filter_var($_POST["userMessage"], FILTER_SANITIZE_STRING);
//additional php validation
if(strlen($user_Name)<4) // If length is less than 4 it will throw an HTTP error.
{
    $output = json_encode(array('type'=>'error', 'text' => 'Name is too short or empty!'));
    die($output);
}
if(!filter_var($user_Email, FILTER_VALIDATE_EMAIL)) //email validation
{
    $output = json_encode(array('type'=>'error', 'text' => 'Please enter a valid email!'));
    die($output);
}
if(strlen($user_Message)<5) //check emtpy message
{
    $output = json_encode(array('type'=>'error', 'text' => 'Too short message! Please enter something.'));
    die($output);
}
//proceed with PHP email.
/*
Incase your host only allows emails from local domain,
you should un-comment the first line below, and remove the second header line.
Of-course you need to enter your own email address here, which exists in your cp.
*/
//$headers = 'From: your-name@YOUR-DOMAIN.COM' . "'r'n" .
$headers = 'From: '.$user_Email.'' . "'r'n" . //remove this line if line above this is un-commented
'Reply-To: '.$user_Email.'' . "'r'n" .
'X-Mailer: PHP/' . phpversion();
    // send mail
$sentMail = @mail($to_Email, $subject, $user_Message .'  -'.$user_Name, $headers);
if(!$sentMail)
{
    $output = json_encode(array('type'=>'error', 'text' => 'Could not send mail! Please check your PHP mail configuration.'));
    die($output);
}else{
    $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_Name .' Thank you for your email. I will get back to you as soon as possible.'));
    die($output);
}

}div ?>

if(!$sentMail)
{
    $output = json_encode(array('type'=>'error', 'text' => 'Could not send mail! Please check your PHP mail configuration.'));
    die($output);
}else{
    $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_Name .' Thank you for your email. I will get back to you as soon as possible.'));
    die($output);
}

if(!$sentMail)
{
    $output = json_encode(array('type'=>'error', 'text' => 'Could not send mail! Please check your PHP mail configuration.'));
}else{
    $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_Name .' Thank you for your email. I will get back to you as soon as possible.'));
}
echo $output;

         <form id="contact_form">
            <div id="result"></div>
            <div class="form-group">
                <label for="name" id="name">Name</label>
                <input type="text" name="name" class="form-control" id="exampleInputName" placeholder="Name" required>
            </div>
            <div class="form-group">
                <label for="Email" id="email">Email address</label>
                <input type="email" name="email" class="form-control" id="exampleInputEmail1" placeholder="Email" required>
            </div>
            <div class="form-group">
                <label for="Message" id="message">Message</label>
                <textarea rows="4" name='message'class="form-control"  placeholder="Message" required></textarea>
            </div>
            <div><span>&nbsp;</span>
                <input type="button" class="btn btn-default" id='submit_btn' value="Submit">
            </div>
        </form>

 <button class="btn btn-default" id="submit_btn">Submit</button>