php 批量保存数据与批量更新数据

if ($insert && $insertsql) {php 批量保存数据与批量更新数据
  $keystr = $valstr = $tmp = '';
  foreach($insertsql as $key => $val) {
   if ($val) {
    $keystr .= $tmp.$key;
    $valstr .= $tmp."'".addslashes($val)."'";
    $tmp = ',';
   }
  }
  if ($keystr && $valstr) {
   dbconn($dbhost,$dbuser,$dbpass,$dbname,$charset,$dbport);
   m(q("INSERT INTO $tablename ($keystr) VALUES ($valstr)") ? 'Insert new record of success' : mysql_error());
  }
 }
 if ($update && $insertsql && $base64) {
  $valstr = $tmp = '';
  foreach($insertsql as $key => $val) {
   $valstr .= $tmp.$key."='".addslashes($val)."'";
   $tmp = ',';
  }
  if ($valstr) {
   $where = base64_decode($base64);
   dbconn($dbhost,$dbuser,$dbpass,$dbname,$charset,$dbport);
   m(q("UPDATE $tablename SET $valstr WHERE $where LIMIT 1") ? 'Record updating' : mysql_error());
  }
 }