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Plugin API/Filter Reference/the content feed

The "the_content_feed" filter is used to filter the content of the post after it is retrieved from the database and filtered by "the_content" and before it is sent to RSS reader (or browser).

A plugin can register as a feed filter with the code:

<?php add_filter( "the_content_feed", "plugin_function_name" ) ?>

Example of filter function:

/**
* @param  $content Content of post
* @return string
*/
function plugin_function_name($content)
{
   $content .= 'Total '.str_word_count($content).' words';
   return $content;
}


NOTE: that the filter function the plugin defines must return the content after it is finished processing, or feed readers will see a blank item and other plugins also filtering the feed content may generate errors.

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