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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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634 | /** |
635 | * Filter the content type for a specific feed type. |
636 | * |
637 | * @since 2.8.0 |
638 | * |
639 | * @param string $content_type Content type indicating the type of data that a feed contains. |
640 | * @param string $type Type of feed. Possible values include 'rss2', 'atom'. |
641 | * Default 'rss2'. |
642 | */ |
643 | return apply_filters( 'feed_content_type', $content_type, $type ); |
644 | } |
645 |
|
646 | /** |
647 | * Build SimplePie object based on RSS or Atom feed from URL. |
648 | * |
649 | * @since 2.8.0 |
650 | * |
651 | * @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged |
652 | * using SimplePie's multifeed feature. |