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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 |
---|---|
596 | /** |
597 | * Filter the content type for a specific feed type. |
598 | * |
599 | * @since 2.8.0 |
600 | * |
601 | * @param string $content_type Content type indicating the type of data that a feed contains. |
602 | * @param string $type Type of feed. Possible values include 'rss2', 'atom'. |
603 | * Default 'rss2'. |
604 | */ |
605 | return apply_filters( 'feed_content_type', $content_type, $type ); |
606 | } |
607 |
|
608 | /** |
609 | * Build SimplePie object based on RSS or Atom feed from URL. |
610 | * |
611 | * @since 2.8.0 |
612 | * |
613 | * @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged |
614 | * using SimplePie's multifeed feature. |