enhance fetch_rss to optionally have a variable cache timeout

[DD32]

Issue: Plugin developers want to check a RSS feed only once per day.

Current Solution: Define MAGPIE_CACHE_AGE to the timeout value before retrieving RSS feed.

Issues with that solution: If multiple plugins want to use different timeouts, its impossible, Only the first item that uses fetch_rss may specify a timeout.

More Elegant solution: Allow fetch_rss() to accept a cache timeout: fetch_rss($rssFeedUrl,24*60*60)

Other Notes:
Patch attached to make this possible, At present All RSS feeds are cached for 1hour, unless MAGPIE_CACHE_AGE is set beforehand.
This also allows developers to disable the RSS cache by specifying a timeout value of 0 seconds. This is not aimed at plugin developers, but mainly towards developers working on any Administration issues which may require constant RSS updates.

[DD32]

fetch_rss add $timeout

[DD32]

Alternate patch added which adds the function

fetch_rss_timeout ($url, $timeout = false )

Designed in mind to allow easier backwards compatibility, Also to allow plugin authors to check if the WordPress install supports the timeout option or not ( if (function_exists('fetch_rss_timeout'))..

[DD32]

I'm tempted to close as wontfix, It doesnt appear to have much traction from others, and storing an option instead works just as well.

Alternativly, You can manually create a RSSCache object and set custom timeouts that way, fetch_rss should pick up those custom RSSCache objects AFAIK. (I believe, i've not attempted this, but plan to for a plugin)

[DD32]

Yep, closing as wontfix, if anyone else comes along with a need too, reopen.