Link Checking Module - 1st attempt

Mar 20, 2008 php

This post is more than 18 months old. Since technology changes too rapidly, this content may be out of date (but that's not always the case). Please remember to verify any technical or programming information with the current release.

So I wrote some code the other day. It sat in my code repository and I never tested it. I was pretty certain it was going to be some good code, though.

A few weeks later I came back to it and looked through it - and laughed!! Anyone figure out where ALL the holes are in this code?

class linkChecker
{
  protected $_links = array();
 
  protected $_sites = array();
 
  public function __construct()
  {}
 
  public function addSite($site)
  {
    if (in_array($site, $this->_sites)) {
      throw new linkException("Site already in list");
    }
 
    $this->_sites[] = $site;
  }
 
  public function processSites()
  {
    foreach ($this->_sites as $site) {
      $this->_processLinks($site);
    }
  }
 
  protected function _processLinks($url)
  {
    $this->_addLink($url, $url);
    $d = new DomDocument;
    @$d->loadHTMLFile($url);
    foreach ($d->getElementsByTagName('a') as $link) {
      $this->_addLink($link->getAttribute('href'), $url);
    }
    unset($d);
  }
 
  protected function _addLink($link, $url)
  {
    $l = new checkableLink($link, $url);
    if (!isset($this->_links[$l->url])) {
      $this->_checkLink($l);
      $this->_links[$l->url] = $l;
    }
    unset($l);
  }
 
  protected function _checkLink(checkableLink &amp;$checkableLink)
  {
    $d = new DomDocument;
    $d->loadHTMLFile($checkableLink->url) or $checkableLink->valid = false;
  }
}
 
class checkableLink
{
  public $host = null;
 
  public $url = null;
 
  public $checked = false;
 
  public $valid = true;
 
  public function __construct($link = null, $url = null)
  {
    if (stripos($link, '/') === 0) {
      $this->url = $url . $link;
    }
    else {
      $this->url = $url;
    }
  }
}
 
class linkException extends exception
{}