Loader.php

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<?php
/*
 You may not change or alter any portion of this comment or credits
 of supporting developers from this source code or any supporting source code
 which is considered copyrighted (c) material of the original comment or credit authors.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

namespace Xmf;

class Loader
{
    public static function loadFile($file, $once = true)
    {
        self::securityCheck($file);
        if (file_exists($file)) {
            if ($once) {
                include_once $file;
            } else {
                include $file;
            }

            return true;
        }

        return false;
    }

    public static function loadClass($class)
    {
        if (class_exists($class, false) || interface_exists($class, false)) {
            return true;
        }

        $file = str_replace('_', DIRECTORY_SEPARATOR, $class) . '.php';
        if (!self::loadFile(dirname(__DIR__) . DIRECTORY_SEPARATOR . $file)) {
            return false;
        }

        if (!class_exists($class, false) && !interface_exists($class, false)) {
            trigger_error(
                "File \"$file\" does not exist or class \"$class\" was not found in the file",
                E_USER_WARNING
            );

            return false;
        }

        return true;
    }

    protected static function securityCheck($filename)
    {
        if (preg_match('/[^a-z0-9\\/\\\\_.:-]/i', $filename)) {
            exit('Security check: Illegal character in filename');
        }
    }
}