-$load = preg_replace( '/[^a-z0-9,_-]+/i', '', $_GET['load'] );
-$load = explode(',', $load);
+$load = $_GET['load'];
+if ( is_array( $load ) )
+ $load = implode( '', $load );
+
+$load = preg_replace( '/[^a-z0-9,_-]+/i', '', $load );
+$load = array_unique( explode( ',', $load ) );