Use a PHP script to filter RSS feeds.
RSSFilter is a PHP script that filters the contents of an RSS feed. The filters can be defined by the publisher so that the resulting RSS feed contains only the information they want. RSSFilter uses rules to filter the items that are included from a feed in the resulting feed.
RSSFilter is designed to be able to be used in conjunction with other RSS Scripts to provide additional RSS solutions. For example RSSFilter can be used with RSSmesh, so that mulitple feeds can be filtered and then merged into a single RSS feed.
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[Source: A Small Business Blog and Small Business Tips Related to Growing, Marketing and Managing a Small Business.]
