Automatic file delete (when the associated resource is deleted in manager)

<?php
//Get the id of the deleted documents
$docID = "115";

//Set the associated template variable ids that need to be deleted
$tvID1 = "26";
$tvID2 = "27";

    //Get the filepath of the first tv (tvID1)
    $result = $modx->db->query( 'SELECT id, value FROM `modx_site_tmplvar_contentvalues` WHERE contentid = \'' .$modx->db->escape($docID). '\' AND tmplvarid = \'' .$modx->db->escape($tvID1). '\' ORDER BY id ASC' );
    while( $row = $modx->db->getRow( $result ) ) {
	$output = $row['value'];

//check that the file is not open already and then delete it
$fh = fopen($output, 'w') or die("can't open file");
fclose($fh);
unlink($output);
}
echo "this file has been deleted: ".$output;
?>

//Set the associated template variable ids that need to be deleted
$tvID1 = "26";
$deletedids = $modx->event->params['ids'];
$countid = count($deletedids);
$i = 0;
while ($i <= $countid-1):

    //Get the filepath of the tv1 (tvID1)
    $result = $modx->db->query( 'SELECT id, value FROM `modx_site_tmplvar_contentvalues` WHERE contentid = \'' .$modx->db->escape($deletedids). '\' AND tmplvarid = \'' .$modx->db->escape($tvID1). '\' ORDER BY id ASC' );
    while( $row = $modx->db->getRow( $result ) ) {
	$output = $row['value'];
    }
//check that the file is not open already and then delete it
$fh = fopen($output, 'w') or die("can't open file");
fclose($fh);
unlink($output);
}

$i++;
endwhile;
return;

if(!function_exists('delete_files')) {
  function delete_files($filename) {
  unlink($filename);
  return true;
  }
}
$modx->invokeEvent("OnEmptyTrash",
    array(
	"ids"=>$ids
));
global $modx;
$deletedids = $modx->event->params['ids'];
$countid = count($deletedids);
$i = 0;
while ($i <= $countid-1):

$table = $modx->getFullTableName("site_tmplvar_contentvalues");
$rows_affected = $modx->db->delete($table, "contentid = $deletedids[$i] AND tmplvarid = 26");

$dir = $modx->$deletedids[$i];
delete_files($dir);
$i++;
endwhile;
return;

$modx->invokeEvent("OnEmptyTrash",
    array(
	"ids"=>$ids
));