file upload

 //file upload
            $s=trim(strtolower($_FILES["team_photo"]["name"])); //get file name
            $ext=end(explode('.', $s)); //get file extension

            if(strlen($s)==0) {
                $error="Please choose a photo";
            }
            else if($ext!='rar' && $ext!='zip' ) {
                $error="Please choose zip/rar file"; //check whether that is zip or rar file
        }
            else {
                $pa="images";
                if(!is_dir($pa)) //if the path is not available
                    mkdir($pa); //create the path

                move_uploaded_file($_FILES["team_photo"]["tmp_name"],$pa.'/filename'.$ext); //upload the file to the path