lib.class.php

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<?php
final class lib {

        private static $libFiles = array();

        private function __construct() {}

        public static function exists($name) {
                return !(self::initFile($name) === false);
        }

        public static function isLoaded($name) {
                return in_array(str_replace(array('/', '\\'), array(DS, DS), self::initFile($name)), get_included_files());
        }

        public static function load($name) {
                if (self::isLoaded($name))
                        return true;

                if ($file = self::initFile($name))
                        return require($file);

                return false;
        }

        public static function initFile($name) {
                if (!array_key_exists($name, self::$libFiles)) {
                        self::$libFiles[$name] = file::nyroExists(array(
                                'name'=>'lib_'.$name.'_init',
                                'type'=>'lib'
                        ));
                }
                return self::$libFiles[$name];
        }

}