Custom form submit

form_json_submitting.js

js:

/**
 * Form submit
 */
document.querySelectorAll('form').forEach(function(el){
    el.addEventListener('submit', function(e){
        var path = window.location.pathname+'php/sender.php';
        var debug = false;

        e.preventDefault();

        // grab values
        var counter = 1;
        var values = Object.values(this).reduce(function(obj,field){
            try {
                if (!field || !(field instanceof HTMLElement)){
                    return obj;
                }
                var name = field.getAttribute('name');
                if (!name){
                    if (field.id) {
                        name = field.id;
                    } else if (field.className) {
                        name = field.className.replace(' ', '__');
                    } else {
                        name = 'field_'+counter;
                        counter++;
                    }
                }

                obj[name] = field.value;
            } catch (error){
                console.log(error);
            }

            return obj;
        }, {});

        if (debug) console.log(values);

        // send values
        var xhr = new XMLHttpRequest();
        xhr.onload = function (){
            xhr__callback(this.responseText);
        }
        xhr.onerror = function (){
        }
        xhr.open("POST", path, true);
        xhr.setRequestHeader('Content-Type', 'application/json');
        xhr.send(JSON.stringify(values));

        // sending callback
        function xhr__callback(data){
            data = JSON.parse(data);
            if (debug) console.log('xhr__callback:', data);
        }
    });
});



php:
<?php
$debug = false;
$mailTo = 'aaa@ooo.com';
$subject = 'Заявка с сайта '.$_SERVER['HTTP_HOST'];
$from = 'admin@'.$_SERVER['HTTP_HOST'];
$message = '';

$postData = file_get_contents('php://input');
$data = json_decode($postData, true);

if ($debug) {
    echo json_encode($data);
}

/**
 * Sending email
 */
if ($data){
    $aliases = [
        'name' => 'Имя',
        'phone' => 'Телефон',
        'calltime' => 'Время для звонка',
        'agree' => 'Согласие на обработку',
        'site' => 'Сайт',
        'wishes' => 'Пожелания',
        'question' => 'Вопрос',
    ];
    foreach ($data as $key => $value){
        if ($message) $message .= '<br> ';
        
        $normalised_key = $key;
        if (array_key_exists($key, $aliases)){
            $normalised_key = $aliases[$key];
        }

        $message .= $normalised_key . ': '.$value;
    }
}

// add ip
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
    $ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
    $ip = $_SERVER['REMOTE_ADDR'];
}
$message .= '<br> IP: '.$ip;

// headers
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
$headers .= 'From: ' . $from . "\r\n";

mail($mailTo, $subject, $message, $headers);

/**
 * json echo
 */
$response = [
    'status' => 'ok',
    'status__message' => 'Спасибо за Ваше обращение!',
    'response__html' => '',
    'response__data' => [],
];

echo json_encode($response);