OverLord Shell

<?php
require_once("db/conn.php");
$catid = (!empty($_POST['catid'])) ? $_POST['catid'] : null;

//echo getDropDown("subcatid","busdir_mst_subcategory","subcategoryname","subcatid","active='y' AND catid = $catid",null,null,'form-control');

$sqlq1="select subcatid from busdir_product where product_id =".$_POST['pid']."";
$sqlconn1=$connection->query($sqlq1);
$sqlrow1=$sqlconn1->fetch_assoc();



$sqlq="select subcatid,subcategoryname from busdir_mst_subcategory where catid =".$catid." and active='y' and subcatid in (select subcatid from busdir_product)";
$sqlconn=$connection->query($sqlq);?>
<option value="">All Sub Categories</option>
<?php

while($sqlrow=$sqlconn->fetch_assoc()){
?>
<option value="<?php echo $sqlrow['subcatid']?>" <?php if($sqlrow['subcatid']==$sqlrow1['subcatid']){?> selected="selected"<?php }?>><?php echo $sqlrow['subcategoryname'];?></option>
<?php
}
?>