Localhost is okay but once deploy, my php website is not working

Question

My website is PHP website. My website is working well with localhost. Ngrok sever is too no problem, but I deployed it in dash.infinity.com. Of course, there is not any mistake, but website is not working well. I used resend API as email API, it occurred internal server error 500. Please help me. My code is following. This is ajax part.

function finish_exam() {
                    $("#ring").addClass("ring");
                    $("#ring").html('Saving');
                    $("#loading").addClass("loading");
                    $('body').css('background-color', '#959566');
                    // var question_array = [];
                    // console.log(q.length);
                    // console.log(q)
                    // console.log(question_array);
                    // console.log(question_array);
                    // console.log(data);
                    $.post('test_insert.php', {
                            email: "<?= $email ?>",
                            title_arr: array2json(title_arr),
                            answer_arr: array2json(answer_arr),
                            q: array2json(q),
                            name_arr: array2json(name_arr),
                            all_answer_arr: array2json(all_answer_arr),
                            question_type: array2json(question_type),
                            // data: data
                        },
                        function (returnedData) {
                            if (returnedData) {
                                console.log(returnedData);
                                let answer = JSON.parse(returnedData);
                                if(answer.flag == "success") {
                                    exam_number = answer.exam_no;
                                    $("#ring").removeClass("ring");
                                    $("#ring").html('');
                                    $("#loading").removeClass("loading");
                                    $('body').css('background-color', '#ffffcc');
                                    // $("#export_btn").removeAttr('disabled');
                                    
                                    $.post('gmail_api.php', {
                                        email:"<?= $email ?>"
                                    }, function (returnedData) {
                                        if(returnedData) {
                                            console.log(returnedData)
                                            alert("Survey completed, no further action is necessary on your part.");
                                        }
                                    } ) 

                                }
                            }
                        }).fail(function () {
                        console.log("error");
                    });
                }

This is PHP part:

<?php
require_once 'vendor/autoload.php';
$email = $_REQUEST['email'];
try {
    // Initialize the Resend client
    $resend = Resend::client('re_SN6U9cej_iLHNvbmjwgGCQEjyCQqiKtsL');

    // Prepare the email data
    $emailData = [
        'from' => 'Survey Notification <[email protected]>',
        'to' => ['[email protected]'],
        'subject' => 'Survey project notification',
        'text' => $email . ' sucessfully completed their survey.',
        'attachments' => [
            // [
            //     'filename' => 'invoice.pdf',
            //     'content' => $invoiceBuffer
            // ]
        ],
        'headers' => [
            // 'X-Entity-Ref-ID' => '123456789',
        ],
        'tags' => [
            // [
            //     'name' => 'category',
            //     'value' => 'confirm_email',
            // ],
        ],
    ];

    // Send the email
    $resend->emails->send($emailData);

    echo "success";
} catch (Exception $e) {
    echo "An error occurred: " . $e->getMessage();
}
?>

As I know, code is no problem. I think Resend API server is not accept my domain. How to solve it? Or Is there other email API without error when deploy my web site?

500 internal service error

Answer 1

I found the reason. My php website is supported php version 8.2. But my hosting site is supported the php version 7.4. There is a reason. Thank you for your time.