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