Adding PHPMailer Without Composer - php

Question

I have this contact form but I am confused as to how I can insert PHPMailer (without Composer) into the script?
I am not sure how to properly add it so that way, once it processes and sends the form it alerts the user. I do not have the ability to utilize composer, so I would need to upload PHPMailer into the directory.
<?php
function validateRecaptcha($secret, $clientResponse, $clientIp)
{
$data = http_build_query([
"secret" => $secret,
"response" => $clientResponse,
"remoteip" => $clientIp,
]);
$options = [
"http" => [
"header" =>
"Content-Type: application/x-www-form-urlencoded\r\n".
"Content-Length: ".strlen($data)."\r\n",
"method" => "POST",
"content" => $data,
],
];
$response = file_get_contents(
"https://www.google.com/recaptcha/api/siteverify",
false,
stream_context_create($options)
);
if($response === false)
{
return false;
}
else if(($arr = json_decode($response, true)) === null)
{
return false;
}
else
{
return $arr["success"];
}
}
$errors = array(); // array to hold validation errors
$data = array(); // array to pass back data
// validate the variables ======================================================
// if any of these variables don't exist, add an error to our $errors array
if (empty($_POST['firstName']))
$errors['firstName'] = 'First Name is required.';
if (empty($_POST['lastName']))
$errors['lastName'] = 'Last Name is required.';
if (empty($_POST['companyName']))
$errors['companyName'] = 'Company Name is required.';
if (empty($_POST['companyAddress']))
$errors['companyAddress'] = 'Company Address is required.';
if (empty($_POST['city']))
$errors['city'] = 'City is required.';
if (empty($_POST['state']))
$errors['state'] = 'State is required.';
if (empty($_POST['emailAddress']))
$errors['emailAddress'] = 'Email Address is required.';
if (empty($_POST['comment']))
$errors['comment'] = 'Comment is required.';
if (empty($_POST['g-recaptcha-response']))
$errors['captcha'] = 'Captcha is required.';
// return a response ===========================================================
// if there are any errors in our errors array, return a success boolean of false
if(!validateRecaptcha($secret, $_POST['g-recaptcha-response'], $_SERVER["REMOTE_ADDR"]))
{
$errors['recaptcha'] = 'Captcha is required.';
}
if ( ! empty($errors)) {
// if there are items in our errors array, return those errors
$data['success'] = false;
$data['errors'] = $errors;
} else {
// if there are no errors process our form, then return a message
// DO ALL YOUR FORM PROCESSING HERE
// THIS CAN BE WHATEVER YOU WANT TO DO (LOGIN, SAVE, UPDATE, WHATEVER)
// show a message of success and provide a true success variable
$data['success'] = true;
$data['message'] = 'Success!';
}
// return all our data to an AJAX call
echo json_encode($data);

Answer 1

Without autoloader:
<?php
//You shall use the following exact namespaces no
//matter in whathever directory you upload your
//phpmailer files.
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
//Now include the following following files based
//on the correct file path. Third file is required only if you want to enable SMTP.
require 'path/to/PHPMailer/src/Exception.php';
require 'path/to/PHPMailer/src/PHPMailer.php';
require 'path/to/PHPMailer/src/SMTP.php';
?>
You shall add the following class to initiate the mailer after checking if your query or condition is executed.
<?php
$mail = new PHPMailer(true);
?>
You shall find a nice and simple example at https://github.com/PHPMailer/PHPMailer/blob/master/README.md to start with.
I hope it helps.