So you display links to other sites on your site, sooner or later one is bound
to end up a dead link, or you may have lots of bookmarks and you cannot be
bothered to weed out all the old ones that no longer point where they used to.

Here is a solution to your problem, an automated link checking routine.

In the code which you can access on the right, you will see that it uses four ways to identify problem URLs.

• 
  Check the URL for errors, e.g. invalid address or “404 page not found”.
  
• 
  Check the URL is not redirected either server side or client side, indicating
  the site has moved
  

These next two require some prior knowledge of the site.

• 
  Check the title has not change, indicating the site is not what it used to be
  
• 
  Check the page has not changed, this only works for static pages