public static function getVersion() { if (self::$versionRetrieved) { return self::$version; } self::$versionRetrieved = true; $location = app_path() . DIRECTORY_SEPARATOR . "version"; if (!is_readable($location)) { return null; } $lines = file($location); if ($lines === false || count($lines) < 1) { return null; } $version = trim($lines[0]); self::$version = $version; return $version; }