SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - php

Question

2018-03-05 18:25:08 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP
o5sm27821483pfh.51 - gsmtp 2018-03-05 18:25:08 CLIENT -> SERVER: EHLO
localhost 2018-03-05 18:25:08 SERVER -> CLIENT: 250-smtp.gmail.com at
your service, [43.247.156.6]250-SIZE
35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250
SMTPUTF8 2018-03-05 18:25:08 CLIENT -> SERVER: STARTTLS 2018-03-05
18:25:08 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS SMTP Error:
Could not connect to SMTP host. 2018-03-05 18:25:09 CLIENT -> SERVER:
QUIT 2018-03-05 18:25:09 2018-03-05 18:25:09 SMTP connect() failed.
https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting Message
has been sent
my code is
<?php
// Import PHPMailer classes into the global namespace
// These must be at the top of your script, not inside a function
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
//Load composer's autoloader
require 'vendor/autoload.php';
$mail = new PHPMailer(); // Passing `true` enables exceptions
try {
//Server settings
$mail->SMTPDebug = 2; // Enable verbose debug output
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'smtp.gmail.com'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'girish8134#gmail.com'; // SMTP username
$mail->Password = '*****'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587; // TCP port to connect to
//Recipients
$mail->setFrom('girish8134#gmail.com', 'Giri');
$mail->addAddress('girish3055#gmail.com', 'giri3055'); // Add a recipient
//Content
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Here is the subject';
$mail->Body = 'This is the HTML message bod';
$mail->AltBody = 'This is the body is';
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) {
echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
}

Answer 1

first try this> https://support.google.com/accounts/answer/1064203?hl=en
Disabling two step authentication.
If it doesn't work like that, you can always try and simplify some code (and try ssl - port 467):
$mail->setFrom('girish8134#gmail.com');
$mail->addAddress('girish3055#gmail.com');
Let me know if it worked.

Answer 2

Try this:
$mail->SMTPSecure = 'ssl'; // Use SSL encryption,
$mail->Port = 465 // change port to 465