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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 |
|---|---|
| 481 | |
| 482 | /** |
| 483 | * Filters the returned, maybe-linked embed URL. |
| 484 | * |
| 485 | * @since 2.9.0 |
| 486 | * |
| 487 | * @param string $output The linked or original URL. |
| 488 | * @param string $url The original URL. |
| 489 | */ |
| 490 | return apply_filters( 'embed_maybe_make_link', $output, $url ); |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * Find the oEmbed cache post ID for a given cache key. |
| 495 | * |
| 496 | * @since 4.9.0 |
| 497 | * |
| 498 | * @param string $cache_key oEmbed cache key. |
| 499 | * @return int|null Post ID on success, null on failure. |