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Consuming an RSS Feed - Zend_Feed
Reading an RSS feed is as simple as instantiating a Zend_Feed_Rss object with the URL of the feed:
If any errors occur fetching the feed, a Zend_Feed_Exception will be thrown.
Once you have a feed object, you can access any of the standard RSS "channel" properties directly on the object:
Note the function syntax. Zend_Feed uses a convention of treating properties as XML object if they are requested with variable "getter" syntax ($obj->property) and as strings if they are access with method syntax ($obj->property()). This enables access to the full text of any individual node while still allowing full access to all children.
If channel properties have attributes, they are accessible using PHP's array syntax:
Since XML attributes cannot have children, method syntax is not necessary for accessing attribute values.
Most commonly you'll want to loop through the feed and do something with its entries. Zend_Feed_Abstract implements PHP's Iterator interface, so printing all titles of articles in a channel is just a matter of:
If you are not familiar with RSS, here are the standard elements you can expect to be available in an RSS channel and in individual RSS items (entries).
Required channel elements:
title - The name of the channel
link - The URL of the web site corresponding to the channel
description - A sentence or several describing the channel
Common optional channel elements:
pubDate - The publication date of this set of content, in RFC 822 date format
language - The language the channel is written in
category - One or more (specified by multiple tags) categories the channel belongs to
RSS <item> elements do not have any strictly required elements. However, either title or description must be present.
Common item elements:
title - The title of the item
link - The URL of the item
description - A synopsis of the item
author - The author's email address
category - One more categories that the item belongs to
comments - URL of comments relating to this item
pubDate - The date the item was published, in RFC 822 date format
In your code you can always test to see if an element is non-empty with:
If you use $item->propname instead, you will always get an empty object which will evaluate to TRUE, so your check will fail.
For further information, the official RSS 2.0 specification is available at: » http://blogs.law.harvard.edu/tech/rss