Why Am I Getting a 'Fatal error: Class 'PHPMailer' not found' Error in PHP, and How Can I Fix It?

Class 'PHPMailer' Not Found: Resolving Fatal Error in PHP

Despite including the 'PHPMailerAutoload.php' file in the same directory as your script, you encounter a "Fatal error: Class 'PHPMailer' not found" error. This issue can be attributed to outdated solutions and changes in the latest PHPMailer version.

Current Solution:

To resolve this error in the latest versions of PHPMailer, you need to follow a revised initialization procedure:

require("/home/site/libs/PHPMailer-master/src/PHPMailer.php");
require("/home/site/libs/PHPMailer-master/src/SMTP.php");

$mail = new PHPMailer\PHPMailer\PHPMailer();
$mail->IsSMTP(); // enable SMTP

$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for Gmail
$mail->Host = "smtp.gmail.com";
$mail->Port = 465; // or 587
$mail->IsHTML(true);
$mail->Username = "xxxxxx";
$mail->Password = "xxxx";
$mail->SetFrom("[email protected]");
$mail->Subject = "Test";
$mail->Body = "hello";
$mail->AddAddress("[email protected]");

if(!$mail->Send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;
} else {
    echo "Message has been sent";
}

By implementing this updated initialization method, you should be able to use PHPMailer without encountering the "Fatal error: Class 'PHPMailer' not found" issue.

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