我的表单可以在我的计算机上的 Brave 中运行，但不能在我的计算机上的 Safari 或 Google 中运行。它也不适用于移动设备。如果它不起作用，它会返回 POST 409 错误。

这是我的 html 代码。

<div class="row">
                            <div class="col-md-12 col-sm-12" id="result"></div>
                            <div class="col-md-3 col-sm-6">
                                <div class="form-group">
                                    <label for="userName" class="d-none"></label>
                                    <input class="form-control" type="text" placeholder="First Name:" required id="userName" name="userName">
                                </div>
                            </div>
                            <div class="col-md-3 col-sm-6">
                                <div class="form-group">
                                    <label for="companyName" class="d-none"></label>
                                    <input class="form-control" type="tel" placeholder="Company Name"  id="companyName" name="companyName">
                                </div>
                            </div>
                            <div class="col-md-3 col-sm-6">
                                <div class="form-group">
                                    <label for="email" class="d-none"></label>
                                    <input class="form-control" type="email" placeholder="Email:" required id="email" name="email">
                                </div>
                            </div>
                            <div class="col-md-3 col-sm-6">
                                <button type="submit" class="button gradient-btn w-100" id="submit_btn">subscribe</button>
                            </div>
                        </div>
                    </form>

这是我的 php 代码

<?php

use PHPMailer\PHPMailer\PHPMailer;

if($_POST)
{

    require_once "PHPMailer/Exception.php";
    require_once "PHPMailer/PHPMailer.php";
    require_once "PHPMailer/SMTP.php";

    $mail = new PHPMailer();


    $your_email = "[email protected]";  //Replace with recipient email address

    $to_Email       = $your_email;

    //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);
    }

    //check $_POST vars are set, exit if any missing
    if(!isset($_POST["userName"]) || !isset($_POST["userEmail"]) || !isset($_POST["userMessage"]))
    {
        $output = json_encode(array('type'=>'error', 'text' => 'Input fields are empty!'));
        die($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_Phone =  $_POST["userPhone"];
    //$user_Subject =  $_POST["userSubject"];
    $user_Message     = filter_var($_POST["userMessage"], FILTER_SANITIZE_STRING);

    //additional php validation
    if(strlen($user_Name)<3) // If length is less than 3 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);
    }


       //Server settings
//    $mail->isSMTP();                                            // Send using SMTP
//    $mail->Host       = 'smtp.googlemail.com';                    // Set the SMTP server to send through
//    $mail->SMTPAuth   = true;                                   // Enable SMTP authentication
//    $mail->Username   = '[email protected]';                     // SMTP username
//    $mail->Password   = 'your password';                         // SMTP password
//    $mail->SMTPSecure = 'TLS';         // Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` also accepted
//    $mail->Port       = 587;                                    // TCP port to connect to

    //Recipients
     $mail->setFrom($user_Email,$user_Name);
     $mail->addAddress($your_email, 'Theme Industry');     // Add a recipient
     $mail->addReplyTo($your_email, 'Information');


    // Content
    $mail->isHTML(true);                                  // Set email format to HTML
    $mail->Subject = 'New Contact Inquiry from your Website';
    $mail->Body  = "<h4 style='text-align: center;padding: 25px 15px;background-color: #0c6c9e;color: #FFFFFF;font-size:16px;width:90%;border-radius: 10px;'>Hi There! You have a new inquiry from your website.</h4><br><br>";


    $mail->Body .= "<strong>Name: </strong>". $user_Name ."<br>";
    $mail->Body .= "<strong>Email: </strong>". $user_Email ."<br>";
    $mail->Body .= "<strong>Phone: </strong>". $user_Phone ."<br>";
    $mail->Body .= "<strong>Message: </strong>". $user_Message ."<br>";

    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    if(!$mail->send())
    {
        $output = json_encode(array('type'=>'error', 'text' => 'Could not send mail! Please check your PHP mail configuration.'));
        die($output);
    }else{
        $output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_Name .' Thank you for contacting us.'));
        die($output);
    }

}
?>

这是我的 JavaScript 代码

//contact us

    $("#submit_btn1 , #submit_btn").on('click', function () {

        let userName = $('#name1').val();

        let userEmail = $('#email1').val();

        let userMessage = $('#message1').val();

        let result;

        if(this.id === 'submit_btn'){

            result = $('#result');

            userMessage = $('#companyName').val();

            userName = $('#userName').val();

            userEmail = $('#email').val();

        }

        else{

            result = $('#result1');

        }

        //simple validation at client's end

        let postData, output;

        let proceed = true;

        if (userName === "") {

            proceed = false;

        }

        if (userEmail === "") {

            proceed = false;

        }

        if (userMessage === "") {

            proceed = false;

        }

        //everything looks good! proceed...

        if (proceed) {



            //data to be sent to server

            postData = {

                'userName': userName,

                'userEmail': userEmail,

                'userMessage': userMessage

            };



            //Ajax post data to server

            $.post('https://thordigi.com/contact.php', postData, function (response) {

                //load json data from server and output message

                if (response.type === 'error') {

                    output = '<div class="alert-danger" style="padding:10px; margin-bottom:25px;">' + response.text + '</div>';

                } else {

                    output = '<div class="alert-success" style="padding:10px; margin-bottom:25px;">' + response.text + '</div>';

                    //reset values in all input fields

                    $('.getin_form input').val('');

                    $('.getin_form textarea').val('');



                }



                result.slideUp("fast").html(output).slideDown();

            }, 'json');



        } else {

            output = '<div class="alert-danger" style="padding:10px; margin-bottom:25px;">Please provide the missing fields.</div>';

            result.slideUp("fast").html(output).slideDown();

        }



    });

我已经被困在这个问题上有一段时间了，所以我非常感谢您的帮助！