private function isValidFullPath(string $path): bool
    {
        $valid = false;
        if ('/' === substr($path, 0, 1) && is_executable($path)) {
            $valid = true;
        }

        return $valid;
    }
private function isValidFullPath(string $path): bool
    {
        $valid = false;
        if ('/' === substr($path, 0, 1) && is_executable($path)) {
            $valid = true;
        }

        return $valid;
    }
private function isValidFullPath ( string $ path ) : bool { $ valid = false ; if ( '/' === substr ( $ path , 0 , 1 ) && is_executable ( $ path ) ) { $ valid = true ; } return $ valid ; }
Returns true if the path points to an executable file.
Returns true if the path points to an executable file .