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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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765 |
|
766 | /** |
767 | * Filters the content type for a specific feed type. |
768 | * |
769 | * @since 2.8.0 |
770 | * |
771 | * @param string $content_type Content type indicating the type of data that a feed contains. |
772 | * @param string $type Type of feed. Possible values include 'rss', rss2', 'atom', and 'rdf'. |
773 | */ |
774 | return apply_filters( 'feed_content_type', $content_type, $type ); |
775 | } |
776 |
|
777 | /** |
778 | * Builds SimplePie object based on RSS or Atom feed from URL. |
779 | * |
780 | * @since 2.8.0 |
781 | * |
782 | * @param string|string[] $url URL of feed to retrieve. If an array of URLs, the feeds are merged |
783 | * using SimplePie's multifeed feature. |