Do you have a big list of links in your database that you want to display but only want to show ones that are still in existance? Well theres a very easy method for doing so. All you need is the fsockopen() function. Here is an example:
| <? $testURL = @fsockopen("www.FreeTemplateDesigns.com", 80, $errno, $errstr, 30); if($testURL) { echo "<a href="http://www.FreeTemplateDesigns.com">Free Template Designs</a>"; } >?> |
In this example you can see the fsocketopen() function being called as a test on the url. If it can connect to it, it exists and prints. Otherwise, nothing happens. now lets say you wanted to do this with a large list of links from your database. It's just as simple.
| <?php $link = mysql_connect('localhost', 'username', 'password'); mysql_select_db('database', $link); $query = mysql_query("SELECT * FROM links"); while($row = mysql_fetch_array($query)) { $testURL = @fsockopen("www.FreeTemplateDesigns.com", 80, $errno, $errstr, 30); if($testURL) { echo "<a href="http://$row[url]">$row[name]</a><br>"; } } ?> |
More Web Programming: 
Hello,
This works good but will only do one part of the job. If someone needs to test if his backlink on a specific page still exists, you need to use some regulare expression like:
if (preg_match("/
$var = true;
}
Check the whole function here: (Back) link checker
Regards Olaf