zipcart debug

zipcart.php

          dpm($zipfunction, 'zipfunction');
          dpm($files, 'files');
          if ( !function_exists($zipfunction) ) {
            drupal_set_message(t('Function !zipfunction not available - look for an issue at !project_url.', array('!zipfunction' => $zipfunction, '!project_url' => l('the ZipCart project page', 'http://drupal.org/project/zipcart'))), 'error');
            return 'Download failed - Zip function not supported.';
          }
          else {
            if ( !$zipfunction($files) ) {
              return 'Download failed.' ;
            }
            else {
              drupal_set_message('Zip downloaded');
              return TRUE ;
            }
          }