[Solved] __autoload() is no longer supported, use spl_autoload_register() instead in c:\xampp\htdocs\PHPapp\PHPMailerAutoload.php on line 37

If you are facing the following error

autoload() is no longer supported, use spl_autoload_register() instead in c:\xampp\htdocs\PHPapp\PHPMailerAutoload.php on line 37

We are here to solve your error. This error can be occurred on localhost and web hosting server as well.Following are the solution of this error

Solution

This error is occurred due to compatibilities of PHP Versions. You are using the old version of PHPMailer so you need to change php version as per you php files so try to upgrade or downgrade the php version .I changed my PHP version from 8.0 to  7.3 and my files started working fine.