/src/admin_panel_dashboard/mail_owner.php

<?php
session_start();
include_once ('../../vendor/autoload.php');
require '../../vendor/phpmailer/phpmailer/PHPMailerAutoload.php';
use App\BidWarBd\User;
use App\BidWarBd\Item;

$user = new User();
$user->prepare($_GET);
$getBidderHeighstInfo = $user->gettingDataForSendingEmail();
//var_dump($getBidderHeighstInfo);
$item = new Item();
$item->prepare($_GET);
$singleProduct = $item->singleProduct();

//var_dump($singleProduct); die();

$owner_name = $singleProduct['name'];
$owner_email = $singleProduct['email'];
$owner_mobile = $singleProduct['mobile'];


//var_dump($owner_name); die();


$heighst_bidder_name = $getBidderHeighstInfo['heighst_bidder_name'];

$heighst_bidder_email = $getBidderHeighstInfo['heighst_bidder_email'];
$heighst_bidder_mobile = $getBidderHeighstInfo['heighst_bidder_mobile'];
$bid_amount = $getBidderHeighstInfo['bid_amount'];
//var_dump($_SESSION['owner_name']); die();

/**
 * This example shows settings to use when sending via Google's Gmail servers.
 */
//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Etc/UTC');

//Create a new PHPMailer instance
$mail = new PHPMailer;
//Tell PHPMailer to use SMTP
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug =0;
//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';
//Set the hostname of the mail server
$mail->Host = 'smtp.gmail.com';


// use
// $mail->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
$mail->Port = 587;
//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';
//Whether to use SMTP authentication
$mail->SMTPAuth = true;


$mail->SMTPOptions = array(
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    )
);

//Username to use for SMTP authentication - use full email address for gmail
$mail->Username = "php.mail.practice@gmail.com";
//Password to use for SMTP authentication
$mail->Password = "php12345";
//Set who the message is to be sent from
$mail->setFrom('php.mail.practice@gmail.com', 'BidWarBD');
//Set an alternative reply-to address
$mail->addReplyTo('replyto@example.com', 'First Last');
//Set who the message is to be sent to
$mail->addAddress($owner_email, $owner_name);
//Set the subject line
$mail->Subject = 'Product Expire date crossed';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
//$mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));
//Replace the plain text body with one created manually

$mail->AltBody = 'This is a plain-text message body';

$body = "Your product date expired. Bid winner's name: ". $heighst_bidder_name. "<br>"
. " Bid winner's mobile number: ". $heighst_bidder_mobile. "<br>".
    " Bid Winner's email: ". $heighst_bidder_email."<br>".
    " Heighst bid: ". $bid_amount ."<br>";
//var_dump($body); die();
$mail->Body= $body;
//Attach an image file
//$mail->addAttachment('images/phpmailer_mini.png');
//send the message, check for errors
if (!$mail->send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;

} else {
    echo "Message sent!";

}