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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 |
|---|---|
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Filters the oEmbed discovery links HTML. |
| 348 | * |
| 349 | * @since 4.4.0 |
| 350 | * |
| 351 | * @param string $output HTML of the discovery links. |
| 352 | */ |
| 353 | echo apply_filters( 'oembed_discovery_links', $output ); |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * Adds the necessary JavaScript to communicate with the embedded iframes. |
| 358 | * |
| 359 | * This function is no longer used directly. For back-compat it exists exclusively as a way to indicate that the oEmbed |
| 360 | * host JS _should_ be added. In `default-filters.php` there remains this code: |
| 361 | * |
| 362 | * add_action( 'wp_head', 'wp_oembed_add_host_js' ) |