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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 |
|---|---|
| 245 | * @since 4.0.0 |
| 246 | * |
| 247 | * @see wp_embed_handler_youtube() |
| 248 | * |
| 249 | * @param string $embed YouTube embed output. |
| 250 | * @param array $attr An array of embed attributes. |
| 251 | * @param string $url The original URL that was matched by the regex. |
| 252 | * @param array $rawattr The original unmodified attributes. |
| 253 | */ |
| 254 | return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Audio embed handler callback. |
| 259 | * |
| 260 | * @since 3.6.0 |
| 261 | * |
| 262 | * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). |
| 263 | * @param array $attr Embed attributes. |