public function isAbsolute()
    {
        $filepath = $this->getPathname();
        if (isset($filepath[0]) && $filepath[0] == self::PATH_SEPARATOR) {
            return true;
        }
        return false;
    }
public function isAbsolute()
    {
        $filepath = $this->getPathname();
        if (isset($filepath[0]) && $filepath[0] == self::PATH_SEPARATOR) {
            return true;
        }
        return false;
    }
public function isAbsolute ( ) { $ filepath = $ this -> getPathname ( ) ; if ( isset ( $ filepath [ 0 ] ) && $ filepath [ 0 ] == self :: PATH_SEPARATOR ) { return true ; } return false ; }
return if file path is absolute

@return      bool
return if file path is absolute