Support/Comments for Virtual Aliases 1.0-rc1

//<?php
// Virtual Aliases
// version 0.0.1
// Allows for an unlimited number of custom aliases per page.
// By Brian Stanback @ www.stanback.net

// On Install: Check the the "OnPageNotFound" box in the System Events tab.
// Plugin configuration: &aliasesTV=Aliases TV name;string;Aliases

// For overriding documents, create a new template variabe (TV) named
// Aliases with the following option:
//    Input Type: Textarea (Smaller)
//
// Aliases should be added to the TV, one per line.
// Omit any leading or trailing slashes as well as the default suffix (usaully .html)

// Begin plugin code
$e = &$modx->event;

if ($e->name == "OnPageNotFound")
{
  // Retrieve requested path + alias
  $documentAlias = $modx->documentIdentifier;
  $documentAlias = ($modx->virtualDir == "") ? $documentAlias : $modx->virtualDir . '/' . $documentAlias;
echo "Alias : ".$documentAlias."<br/>";
  // Search TVs for potential alias matches
  $sql = "SELECT tvc.contentid as id, tvc.value as value FROM " . $modx->getFullTableName('site_tmplvars') . " tv ";
  $sql .= "INNER JOIN " . $modx->getFullTableName('site_tmplvar_templates') . " tvtpl ON tvtpl.tmplvarid = tv.id ";
  $sql .= "LEFT JOIN " . $modx->getFullTableName('site_tmplvar_contentvalues') . " tvc ON tvc.tmplvarid = tv.id ";
  $sql .= "LEFT JOIN " . $modx->getFullTableName('site_content') . " sc ON sc.id = tvc.contentid ";
  $sql .= "WHERE sc.published = 1 AND tvtpl.templateid = sc.template AND tv.name = '$aliasesTV'";
  $results = $modx->db->query($sql);
  // Attempt to find an exact match
  $found = 0;
  //debug	$tableau[] =$documentAlias ;
  while ($found == 0 && $row = $modx->db->getRow($results))
  {
     $pageAliases = explode("\n", $row["value"]);
     while ($found == 0 && $alias = each($pageAliases))
     {
     $alias[1] = trim($alias[1]);
     	if (strlen($alias[1])>0 && $alias[1][0] == "#") {
		$out = preg_match($alias[1], $documentAlias);
		$returnValue = (!empty($out))? count($out)>0: false;
	} else {
	$returnValue = false; 
	}
	if (($alias[1] == $documentAlias ) || $returnValue )  // Check for a match
           $found = $row["id"];
     }
  }
  if ($found)  // Redirect to new document, if an alias was found
  {

     $pageUrl = $modx->makeUrl($found, '', '', "full");
     $modx->sendRedirect($pageUrl, 0, "REDIRECT_HEADER", 'HTTP/1.1 301 Moved Permanently');      exit(0);
  }

  header("HTTP/1.0 404 Not Found");
  header("Status: 404 Not Found");
}