PHP+ SQL запрос

<?php
echo '<form action="index.php?page=4"
 method="post"
 enctype="multipart/form-data"
 class="input-group">';
echo '<select name="hotelid">';
$sel=<<<SQL
select ho.id, co.country,ci.city,ho.hotel
from countries co,cities ci, hotels ho
where co.id=ho.countryid and ci.id=ho.cityid
order by co.country;
SQL;
$res=$DB->query($sel);
while($row=$res->fecth(PDO::FETCH_NUM)){
echo '<option value="'.$row[0].'">';
echo $row[1].'&nbsp;&nbsp;'.$row[2].'&nbsp;&nbsp;'.$row[3].'</option>';
}
$ans=$DB->query($res);
echo '<input type="file" name="file[]" multiple
 accept="image/*">';
echo '<input type="submit" name="addimage"
 value="Add"
class="btn btn-sm btn-info">';
echo '</select>';
echo '</form>';
if(isset($_REQUEST['addimage'])){
foreach($_FILES['file']['name'] as $k => $v)
{
if($_FILES['file']['error'][$k] !=0){
echo '<script>alert("Upload file error:'.$v.'")</script>';
continue;
 }
if(move_uploaded_file($_FILES['file']
['tmp_name'][$k],'images/'.$v)){
$ins=<<<SQL
insert into images(hotelid,imagepath) values(".$_REQUEST['hotelid'].',"images/'.$v.'");
SQL;
$ans=$DB->query($ins);
 }
 }
}
echo '</div>';
?>

$ins=<<<SQL
INSERT INTO images(hotelid,imagepath) VALUES('{$_REQUEST['hotelid']}',"images/$v");
SQL;

"INSERT INTO images(hotelid, imagepath) VALUES('{$_REQUEST['hotelid']}', 'images/$v')";