update BB

<?php
/*
CREATE TABLE IF NOT EXISTS `file_csv` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `code` varchar(50) NOT NULL,
  `date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `contents` longblob NOT NULL,
  `user_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `code` (`code`)
) ENGINE=MyISAM
*/
$mysqli = new mysqli("localhost", "root", "", "inibayik_bayi");

    /* check connection */
    if (mysqli_connect_errno()) {
        printf("Connect failed: %s\n", mysqli_connect_error());
        exit();
    }


if($_POST)
{
     copy($_FILES['f']['tmp_name'],'035.tmp');
    $row = 1; $s='';
    /*
    $a=array('tes1'=>434,'tes2'=>33535);
    die(implode(",",array_keys($a) ));
    */
    $a=array('code'=>$_FILES['f']['name'],
    'user_id'=>99
    );

    //die("'".implode("','",array_keys($a) )."'");

    if (($handle = fopen("035.tmp", "r")) !== FALSE)
    {
        $aCsv=array();
        while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
            $num = count($data);
            $aCsv[]=$data;

        }


        $a['contents'] = json_encode($aCsv);
        //trim(fread($handle, filesize('035.tmp')) );

        $a2=array();
        foreach($a as $n=>$v)$a2[$n]= addslashes($v);
        $val=implode("','", $a2 );
        $sql="select count(id) c from file_csv where code like '$a[code]'";
        $q=$mysqli->query($sql);
        $row = $q->fetch_assoc();
        $stat="update";
        if($row['c']==0)
        {
            $stat="insert";
        }

        if($stat=='update')
        {
            $sql="select id
            from file_csv
            where code like '$a[code]'";
            $q=$mysqli->query($sql);
            $row = $q->fetch_assoc();
            if(!$q)
            {
                die($mysqli->error);
            }

//==============rename file csv yang terdahulu
            $mktime=@mktime()-1385442970;
            $sql="UPDATE   `file_csv` SET  `code` =  '{$a['code']}_".$mktime."' WHERE  `file_csv`.`id` =$row[id];";
            $q=$mysqli->query($sql);

            $sql="insert into
            file_csv(`".implode("`,`",array_keys($a) )."`)
            values('$val')";

        }else{
            $sql="insert into
            file_csv(`".implode("`,`",array_keys($a) )."`)
            values('$val')";
        }

        fclose($handle);
        $q=$mysqli->query($sql);
        unlink('035.tmp');
        if(!$q)
        {
            die($mysqli->error);
        }
    }

    ?><script>alert('data sudah di upload');
    window.location.href ="?done=1"; </script><?
}
?>
<form name='myform' enctype='multipart/form-data' method='POST'>

        <div id='selectfile'>
        <input type=file name=f />
        </div>
    <br>
    <input type='hidden' name='n'  value='1' />
   <INPUT TYPE=SUBMIT VALUE='upload' name ='submit'>
    </form>