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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 |
|---|---|
| 1429 | * it hasn't, then it will load the embeds library. |
| 1430 | * |
| 1431 | * @since 2.9.0 |
| 1432 | */ |
| 1433 | function wp_maybe_load_embeds() { |
| 1434 | if ( ! apply_filters( 'load_default_embeds', true ) ) |
| 1435 | return; |
| 1436 | wp_embed_register_handler( 'googlevideo', '#http://video\.google\.([A-Za-z.]{2,5})/videoplay\?docid=([\d-]+)(.*?)#i', 'wp_embed_handler_googlevideo' ); |
| 1437 | wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); |
| 1438 | wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); |
| 1439 | } |
| 1440 | |
| 1441 | /** |
| 1442 | * The Google Video embed handler callback. Google Video does not support oEmbed. |
| 1443 | * |
| 1444 | * @see WP_Embed::register_handler() |
| 1445 | * @see WP_Embed::shortcode() |
| 1446 | * |
| 1447 | * @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}. |