Fatal error: Uncaught Error: Class 'PHPMailer' not found

Question

I am facing this error "Fatal error: Uncaught Error: Class 'PHPMailer' not found" when I submit the appointment form. The code is working fine on localhost but not working on live server.

On the live server, I have created a directory named "phpmailer" on the root directory of the website where all files are located. The "phpmailer" directory has 4 files:

1. class.phpmailer.php
2. class.smtp.php
3. credentials.php
4. PHPMailerAutoload.php

I also make a copy of the file "PHPMailerAutoload.php" out of the "phpmailer" directory, then I edit the file "PHPMailerAutoload.php" and change the path by putting phpmailer.

Here is the email code:

    require 'PHPMailerAutoload.php';
    require 'phpmailer/credentials.php';

    $mail = new PHPMailer;  // This line has an error of PHPMailer class not found 

    $mail->SMTPDebug = 0;                                    

    $mail->isSMTP();                                         
    $mail->Host = 'smtp.ipage.com';                          
    $mail->SMTPAuth = true;                                  
    $mail->Username = EMAIL;                                 
    $mail->Password = PASS;                                  
    $mail->SMTPSecure = 'tls';                               
    $mail->Port = 587;                                       

    $mail->setFrom(EMAIL, 'Symbiosis Home Care');
    $mail->addAddress('babarabid123@gmail.com', 'Babar Ali');
    
    $mail->addReplyTo(EMAIL);

    $mail->Subject = "Enquiry Form - Symbiosis Home Care";
    $mail->Body    = 'New Enquiry Received';

    if(!$mail->send()) {
        echo 'Message could not be sent.';
          echo 'Mailer Error: ' . $mail->ErrorInfo;
    } 
    else{
          if (!empty($i_name)) {
            $result='<div class="alert alert-success background-success">
                <button aria-label="Close" class="close" data-dismiss="alert" type="button"><i class="fa fa-close"></i></button>Welcome <strong>' . $i_name .',</strong> Thanks For Contacting Us. We Will Get Back To You Soon.</div>';
            echo $result;
          }
          else {}
    }

Answer 1

Before I was using an outdated phpmailer library. Then I went to github website I searched for how to install the composer. After installing the composer, follow the steps given below:

1. Go to your project root directory
2. Press Shift + Right-click and then click on Window Powershell
3. Write this command "composer require phpmailer/phpmailer". It will take 2-3 minutes to execute the command.
4. When command executes successfully, it will create some files and folders in that particular directory. After all of this, you just have to use the following code to make your phpmailer work.

Note: Remember, use namespaces/packages at the top of your code otherwise phpmailer will not work.

<!-- Contact/Appointment Form Start-->
<?php 

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

include("database.php");

if(isset($_POST['contact_submit'])) {

$i_name = $_POST['name'];
$i_phone = $_POST['phone'];
$i_email = $_POST['email'];
$i_service = $_POST['service'];
$i_subject = $_POST['subject'];
$i_message = $_POST['message'];
$i_status = true;

// Date Time Settings
date_default_timezone_set('Asia/Dubai');
//$i_date = date("d-m-Y H:i:s");
$i_date = date("d-m-Y, g:i a");  //output => 12-01-2019, 5:29 pm

// Inserting Inquiry Records in Table 
$sql = "insert into inquiry_tbl(name,phone,email,service,subject,message,submission_date,status) values('$i_name','$i_phone','$i_email','$i_service','$i_subject','$i_message','$i_date','$i_status')";

if($con->query($sql)){
$last_id = $con->insert_id;
// Email Code Start

// Load Composer's autoloader
require 'vendor/autoload.php';

// Instantiation and passing `true` enables exceptions
$mail = new PHPMailer(true);

try {
//Server settings
$mail->SMTPDebug = 0;                      // Enable verbose debug output
$mail->isSMTP();                                            // Send using SMTP
$mail->Host       = 'smtp.ipage.com';                    // Set the SMTP server to send through
$mail->SMTPAuth   = true;                                   // Enable SMTP authentication
$mail->Username   = 'your email';                     // SMTP username
$mail->Password   = 'your password';                               // SMTP password
$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;         // Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` encouraged
$mail->Port       = 587;                                    // TCP port to connect to, use 465 for `PHPMailer::ENCRYPTION_SMTPS` above

//Recipients
$mail->setFrom('info@symbiosishomecare.com', 'New Enquiry');
$mail->addAddress('babarabid123@gmail.com', 'Babar Ali');     // Add a recipient
// $mail->addAddress('ellen@example.com');               // Name is optional
// $mail->addReplyTo('info@example.com', 'Information');
// $mail->addCC('cc@example.com');
// $mail->addBCC('bcc@example.com');

// Attachments
// $mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
// $mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name

// Content
$mail->isHTML(true);                                  // Set email format to HTML
$mail->Subject = 'Email Subject';
$mail->Body    = 'Body Content';
$mail->AltBody = 'Alternate Body content';

$mail->send();
$result='<div class="alert alert-success background-success">
<button aria-label="Close" class="close" data-dismiss="alert" type="button"><i class="fa fa-close"></i></button>Welcome <strong>' . $i_name .',</strong> Thanks For Contacting Us. We Will Get Back To You Soon.</div>';
echo $result;
echo 'Message has been sent';
} 
catch (Exception $e) {
echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

// Email Code End
}
else{
$sql_error = mysqli_error($con);
if (!empty($sql_error)) {
$result='<div class="alert alert-danger background-danger">
<button aria-label="Close" class="close" data-dismiss="alert" type="button"><i class="fa fa-close"></i></button> <strong>Error: </strong>'. $sql_error .'</div>';
echo $result;
}
else {}
}
}
else{}
mysqli_close($con);
?>