Query String Filter from Drop-Down Menus

Okay, I see what you're trying to do here.

Check this out:

$where = "tableName = 'pages' AND fieldName ='gallery'";

if (@$_REQUEST['user'] != "") {
    $where .= " AND info5 = ".mysql_escape($_REQUEST['user']);
}
if (@$_REQUEST['category'] != "") {
    $where .= " AND info4 = ".mysql_escape($_REQUEST['category']);
}

// do getRecords here

The period followed by equals on $where indicates that the following string is to be appended to the end of $where, instead of replacing it entirely. Much easier than trying out a dozen different if statements, as it builds the $where parameter dynamically.

Also - ALWAYS escape your raw inputs. SQL injection is serious business!