dolibarr/htdocs/debugbar/class/autoloader.php

<?php

/**
 * Simple autoloader, so we don't need Composer just for this.
 */

spl_autoload_register(function ($class) {
    if (preg_match('/^DebugBar/', $class) || preg_match('/^'.preg_quote('Psr\Log', '/').'/', $class)) {
        $file = DOL_DOCUMENT_ROOT.'/includes/'.str_replace('\\', DIRECTORY_SEPARATOR, $class).'.php';
        //var_dump($class.' - '.file_exists($file).' - '.$file);
        if (file_exists($file)) {
    		require_once $file;
    		return true;
    	}
    	return false;
    }
    return true;
});