removes unmatched objects from an array of objects

filterResults.php

<?php
public function filterResults($results)
     {
         $app = JFactory::getApplication();
         $pattern = $app->input->get('filter_id');
         // loop through results to remove unwanted results
         for ($i = 0; $i <= count($results->entries)+1; $i++)
         {
             // loop through path way to find matches and remove if not found.
             foreach ($results->entries[$i]->path_collection->entries as $result)
             {
                 $matches = array();
                 // check for matches. if not found add index to array
                 if ($pattern === $result->id)
                 {
                     $matches[] = $i;
                     break 1;
                 }
             }
             // remove anything that didn't match
             if (!in_array($i, $matches))
             {
                 unset($results->entries[$i]);
             }
         }
         // return the modified results array to the model
         return $results;
     }
?>