help with php if statement

[rlhanson]

I basically want this:

 <?php 
$cat1 = $_POST['cat1'];
if (isSet($_POST['cat1'])){
createGallery("prodimages/{$rs['pId']}/{$cat1}/","gallery/{$rs['pId']}/{$cat1}/");
 }else {
//tell script that $cat1 is "recent"
 createGallery("prodimages/{$rs['pId']}/{$cat1}/","gallery/{$rs['pId']}/{$cat1}/",200);
   } 
?>