A filter hook called by the get_category_feed_link function prior to printing out in a template.
<?php
function filter_handler( $seconds ) {
// ...
}
add_filter( 'wp_feed_cache_transient_lifetime' , 'filter_handler' ); ?>
<?php
function return_7200( $seconds ) {
// change the default feed cache recreation period to 2 hours
return 7200;
}
add_filter( 'wp_feed_cache_transient_lifetime' , 'return_7200' );
$feed = fetch_feed( $feed_url );
remove_filter( 'wp_feed_cache_transient_lifetime' , 'return_7200' );
?>
wp_feed_cache_transient_lifetime is located in wp-includes/class-feed.php.