public function touch($modifyTime = null, $accessTime = null) {
        return touch($this->fullName, $modifyTime, $accessTime);
    }
public function touch($modifyTime = null, $accessTime = null) {
        return touch($this->fullName, $modifyTime, $accessTime);
    }
public function touch ( $ modifyTime = null , $ accessTime = null ) { return touch ( $ this -> fullName , $ modifyTime , $ accessTime ) ; }
UPDATE FILE MODIFY TIME AND ACCESS TIME
IF NOT EXIST, WILL CREATE
@param int $modifyTime
@param int $accessTime
@return bool
UPDATE FILE MODIFY TIME AND ACCESS TIME IF NOT EXIST WILL CREATE