语法错误查询INSERT INTO php

我尝试了mysql_query（），但收到一个错误，说"您的SQL语法有错误；请查看与您的mysql服务器版本相对应的手册，了解附近要使用的正确语法……问题是查询字符串

 $val=$_POST["valori"];
 $t=explode(",",$val);
 $id="";
 $nomi="";
 $i=0;
   $turno=$_POST["turno"];
  $div=$_POST["prova"];

   $username = "root";
    $password = "";
   $hostname = "localhost"; 
    $dbname = "culp";
  $dbhandle=mysql_connect($hostname, $username, $password);
   mysql_select_db($dbname) or die("Unable to select database");
  while(count($t)!=$i)
{
             $id=$id.$t[$i+1].",";
             $nomi=$nomi.$t[$i].",";
             $i=$i+2;
}

 $query1="INSERT INTO foglio (turno,paper,".$id."data)VALUES('$turno','$div','".$nomi."'CURDATE());";
    echo $query1;
    mysql_query($query1)or trigger_error(mysql_error()." in ".$query1);