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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 |
|---|---|
| 506 | 'rss' => 'application/rss+xml', |
| 507 | 'rss2' => 'application/rss+xml', |
| 508 | 'rss-http' => 'text/xml', |
| 509 | 'atom' => 'application/atom+xml', |
| 510 | 'rdf' => 'application/rdf+xml' |
| 511 | ); |
| 512 | |
| 513 | $content_type = ( !empty($types[$type]) ) ? $types[$type] : 'application/octet-stream'; |
| 514 | |
| 515 | return apply_filters( 'feed_content_type', $content_type, $type ); |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * Build SimplePie object based on RSS or Atom feed from URL. |
| 520 | * |
| 521 | * @since 2.8 |
| 522 | * |
| 523 | * @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged |
| 524 | * using SimplePie's multifeed feature. |