What is autoload in php? [duplicate]

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This will be of help to you about usage of autoload. http://ditio.net/2008/11/13/php-autoload-best-practices/

It’s a magic function that helps you include / require files using class name. 

function __autoload($class_name) 
{
    require_once $DOCUMENT_ROOT . “/classes/” . $class_name .“.php”;
}

It’s deprecated at PHP 7.2.0 and spl_autoload_register is recommended for that purpose.

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