contact, email setting [SOLVED]

<?php
/**
* Part of Showkase web site management package
*
* @package Showkase
* @author Jack Hardie {@link http://www.jhardie.com}
* @copyright Copyright (c) 2015, SimpleViewer Inc.
*/

error_reporting(E_ERROR);
ini_set('html_errors', 0);
function exception_error_handler($errno, $errstr, $errfile, $errline ) {
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
}
set_error_handler("exception_error_handler");
date_default_timezone_set('UTC');
if (!$_POST) return;
require 'class.phpmailer.php';
$mailer = new PHPMailer(true);
$mailer->CharSet = 'utf-8';

/*$mailer->isMail();*/
//Tell PHPMailer to use SMTP
$mailer->isSMTP();

//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mailer->SMTPDebug = 2;

//Ask for HTML-friendly debug output
$mailer->Debugoutput = 'html';

//Set the hostname of the mail server
$mailer->Host = 'smtp.gmail.com';

// use
// $mailer->Host = gethostbyname('smtp.gmail.com');
// if your network does not support SMTP over IPv6
//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mailer->Port = 587;

//Set the encryption system to use - ssl (deprecated) or tls
$mailer->SMTPSecure = 'tls';

//Whether to use SMTP authentication
$mailer->SMTPAuth = true;

//Username to use for SMTP authentication - use full email address for gmail
$mailer->Username = "jskno1@gmail.com";

//Password to use for SMTP authentication
$mailer->Password = "my password";

$mailer->isHTML(false);
$mailer->WordWrap = 78;
try {
    if (
        !isset($_SERVER['HTTP_X_REQUESTED_WITH'])
        && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest'
    ) {
        throw new Exception ('This program is for use by the Showkase contact form only');
    }
    if (get_magic_quotes_gpc()) {
        foreach($_POST as &$value) {
            $value = stripslashes($value);
        }
        unset($value);
    }
    $xmlSourcePath = $_POST['pagePath'].DIRECTORY_SEPARATOR.'page.xml';
    $xmlSource = @file_get_contents($xmlSourcePath);
    if ($xmlSource === false) {
        throw new Exception ('Cannot read page.xml file');
    }
    if ($xmlSource == '') {
        throw new Exception ('No content in page.xml file');
    }
    $domDoc = new DOMDocument();
    $domDoc->preserveWhiteSpace = false;
    $loaded = $domDoc->loadXML($xmlSource);
    if ($loaded === false) {
      $message = '';
      $errors = libxml_get_errors();
      foreach ($errors as $error) {
          $message .= 'XML error in page.xml, line '.$error->line.'. '.$error->message.'<br>';
      }
      libxml_clear_errors();
      throw new Exception($message);
    }
    $settingsTags = $domDoc->getElementsByTagName('settings');
    $tags = $settingsTags->item(0)->childNodes;
    foreach ($tags as $tag) {
      $vars[$tag->nodeName] = $tag->nodeValue;
    }
    // PHPMailer takes care of validation and sanitization
    $subject = isset($vars['ss_contactFormSubject'])
        ? $vars['ss_contactFormSubject']
        : '';
    $siteEmail = isset($vars['ss_contactFormTo'])
        ? $vars['ss_contactFormTo']
        : '';
    $response = isset($vars['ss_contactFormResponse'])
        ? $vars['ss_contactFormResponse']
        : '';
    $userName       = $_POST["userName"];
    $userEmail     = $_POST["userEmail"];
    $userMessage = $_POST["userMessage"];
    if(!PHPMailer::validateAddress($siteEmail)) {
          throw new Exception ('Site email address is not set or invalid');
    }
    if(strlen($userName) < 1){
          throw new Exception ('Please enter your name');
    }
    if(!PHPMailer::validateAddress($userEmail)) {
          throw new Exception ('Please enter a valid email');
    }
    if(strlen($userMessage) < 1){
          throw new Exception ('Please enter your message text');
    }
    if (stristr($siteEmail, '@') === '@example.com') {
        $output = json_encode(array('type'=>'message', 'text' => $response));
          die($output);
    }
//    $mailer->setFrom('mailer'.strstr($siteEmail, '@'), $userName);
$mailer->setFrom('jskno1@gmail.com', $userName);
    $mailer->addReplyTo($userEmail, $userName);
    $mailer->addAddress($siteEmail);
    $mailer->Subject = $subject;
    $mailer->Body =
        $userMessage
        ."\r\n\r\n"
        .$userName
        ."\r\n\r\n"
        .$userEmail;
    $mailer->send();
      $output = json_encode(array('type'=>'message', 'text' => $response));
      echo($output);
} catch (Exception $e) {
    $output = json_encode(array('type'=>'error', 'text' => $e->getMessage()));
    die($output);
}

do not operation

help plz

synology nas was the cause of the problem

I solved

It's working this way.

thx~~~