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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 |
---|---|
500 | 'rss' => 'application/rss+xml', |
501 | 'rss2' => 'application/rss+xml', |
502 | 'rss-http' => 'text/xml', |
503 | 'atom' => 'application/atom+xml', |
504 | 'rdf' => 'application/rdf+xml' |
505 | ); |
506 |
|
507 | $content_type = ( !empty($types[$type]) ) ? $types[$type] : 'application/octet-stream'; |
508 |
|
509 | return apply_filters( 'feed_content_type', $content_type, $type ); |
510 | } |
511 |
|
512 | /** |
513 | * Build SimplePie object based on RSS or Atom feed from URL. |
514 | * |
515 | * @since 2.8 |
516 | * |
517 | * @param string $url URL to retrieve feed |
518 | * @return WP_Error|SimplePie WP_Error object on failure or SimplePie object on success |