Comments on: Retrieve, Cache, and Display Your FeedBurner Subscriber Count http://davidwalsh.name/cache-feedburner Legendary scribbles about JavaScript, HTML5, AJAX, PHP, CSS, and ∞. Tue, 22 May 2012 05:31:04 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Lukehttp://davidwalsh.name/cache-feedburner#comment-12607 Luke Tue, 13 Oct 2009 08:31:44 +0000 http://davidwalsh.name/?p=3775#comment-12607 @Karthik: Even better! Hadn't thought of that option myself, but, I must say, a very elegant solution. @Karthik: Even better! Hadn’t thought of that option myself, but, I must say, a very elegant solution.

]]> By: Karthik Viswanathanhttp://davidwalsh.name/cache-feedburner#comment-12593 Karthik Viswanathan Sun, 11 Oct 2009 17:37:13 +0000 http://davidwalsh.name/?p=3775#comment-12593 @Luke: Instead of storing the date inside the file, why not just use the time when the file was modified? $interval = 24 * 60 * 60; // 24 hr * 60 min / hr * 60 sec / min if( file_exists( $path_to_file ) && ( time() - $interval ) < filemtime( $path_to_file ) ) { readfile( $path_to_file ); exit(); }// find new information and store it in the file @Luke: Instead of storing the date inside the file, why not just use the time when the file was modified?
$interval = 24 * 60 * 60; // 24 hr * 60 min / hr * 60 sec / min
if( file_exists( $path_to_file ) && ( time() – $interval ) < filemtime( $path_to_file ) ) {
readfile( $path_to_file );
exit();
}

// find new information and store it in the file

]]> By: Darkimmortalhttp://davidwalsh.name/cache-feedburner#comment-12573 Darkimmortal Fri, 09 Oct 2009 19:13:35 +0000 http://davidwalsh.name/?p=3775#comment-12573 Memcache > cache files Memcache > cache files

]]> By: Nathan barnetthttp://davidwalsh.name/cache-feedburner#comment-12572 Nathan barnett Fri, 09 Oct 2009 18:22:35 +0000 http://davidwalsh.name/?p=3775#comment-12572 It makes sense to me to use a simple library like Cache_Lite from PEAR to handle this sort of problem. The nice thing about using Cache_Lite is that you can set an expiration time and have the natural flow of traffic decide when to repopulate the cache. It can also be automatically serialized if your saving arrays and the like. In a high traffic environment its often important to set the cache expiration to never expire and re-populate the cache via cron. I personally use a simple wrapper to use either Cache_Lite or memcached so I can easily switch between the two caching methods depending on what works best for the specific problem.http://pear.php.net/package/Cache_Lite http://us3.php.net/memcache It makes sense to me to use a simple library like Cache_Lite from PEAR to handle this sort of problem. The nice thing about using Cache_Lite is that you can set an expiration time and have the natural flow of traffic decide when to repopulate the cache. It can also be automatically serialized if your saving arrays and the like. In a high traffic environment its often important to set the cache expiration to never expire and re-populate the cache via cron. I personally use a simple wrapper to use either Cache_Lite or memcached so I can easily switch between the two caching methods depending on what works best for the specific problem.

http://pear.php.net/package/Cache_Lite
http://us3.php.net/memcache

]]> By: Eric Wendelinhttp://davidwalsh.name/cache-feedburner#comment-12571 Eric Wendelin Fri, 09 Oct 2009 17:39:05 +0000 http://davidwalsh.name/?p=3775#comment-12571 I know not everyone can do this, but I actually run a cron job on my server that replaces the feed count every 2 hours or so. The difference there is I make a direct replacement in my wordpress theme instead of using a text file. I know not everyone can do this, but I actually run a cron job on my server that replaces the feed count every 2 hours or so. The difference there is I make a direct replacement in my wordpress theme instead of using a text file.

]]> By: David Walshhttp://davidwalsh.name/cache-feedburner#comment-12565 David Walsh Fri, 09 Oct 2009 15:55:10 +0000 http://davidwalsh.name/?p=3775#comment-12565 I hear you Luke. I prefer separate files for the sake of simplicity but your idea is a good one for those that would like to stick to one file. I hear you Luke. I prefer separate files for the sake of simplicity but your idea is a good one for those that would like to stick to one file.

]]> By: Lukehttp://davidwalsh.name/cache-feedburner#comment-12564 Luke Fri, 09 Oct 2009 15:03:45 +0000 http://davidwalsh.name/?p=3775#comment-12564 It may be only a small concern (and an "undocumented feature" for some users), but this function results in a new text file being created for every day it is triggered. Whilst alot of webhosts give very generous file storage quotas, and a feed's popularity could be determined over time using these files, it seems a little wasteful.Would another option be to have a single text file ("feedburner_sub_count.txt") and save into that file a serialized array containing two key-value sets keyed as "date" and "count"?Of course, this would mean that the file would have to be loaded and unserialized to get the "date" value and then figure out whether it needed to pull data from Feedburner again (to replace the array values and then serialize and resave the new array in the same file), but it would mean only one file. It may be only a small concern (and an “undocumented feature” for some users), but this function results in a new text file being created for every day it is triggered. Whilst alot of webhosts give very generous file storage quotas, and a feed’s popularity could be determined over time using these files, it seems a little wasteful.

Would another option be to have a single text file (“feedburner_sub_count.txt”) and save into that file a serialized array containing two key-value sets keyed as “date” and “count”?

Of course, this would mean that the file would have to be loaded and unserialized to get the “date” value and then figure out whether it needed to pull data from Feedburner again (to replace the array values and then serialize and resave the new array in the same file), but it would mean only one file.

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