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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 |
|---|---|
| 178 | wp_embed_register_handler( 'googlevideo', '#http://video\.google\.([A-Za-z.]{2,5})/videoplay\?docid=([\d-]+)(.*?)#i', 'wp_embed_handler_googlevideo' ); |
| 179 | |
| 180 | /** |
| 181 | * Filter the audio embed handler callback. |
| 182 | * |
| 183 | * @since 3.6.0 |
| 184 | * |
| 185 | * @param callable $handler Audio embed handler callback function. |
| 186 | */ |
| 187 | wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); |
| 188 | |
| 189 | /** |
| 190 | * Filter the video embed handler callback. |
| 191 | * |
| 192 | * @since 3.6.0 |
| 193 | * |
| 194 | * @param callable $handler Video embed handler callback function. |
| 195 | */ |
| 196 | wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); |