How i can check /difference in Rss feed thought required

HI everyone

How i can check /difference in Rss feed thought required

honestly i am clueless no totally stacked

here is Hd wallpapers Rss feed

_http://hdw.eweb4.com/latest.rss

This feed may change in minute may be in hour OR day

can any body have idea/suggestion how i can easily build a script that can check difference

 

You can do this by storing the date to mysql
Here is how to extract the date

<?php
$html = file_get_contents('http://hdw.eweb4.com/latest.rss');
preg_match('/<lastBuildDate>(.*)<\/lastBuildDate>/i', $html, $lastBuild);
echo $lastBuild[1];
?>

Code (markup):

 

Thanks
but it is only give " Thu, 11 Jul 2013 21:32:30 +0300 "
i want changes in new files and want to getting

 

Ow i see what you mean. Well that takes allot more writing.

https://forums.digitalpoint.com/threads/compare-2-html-files-and-display-difference.2666666/