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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 247 | * @since 2.9.0 |
| 248 | * |
| 249 | * @see WP_Embed::shortcode() |
| 250 | * |
| 251 | * @param mixed $cache The cached HTML result, stored in post meta. |
| 252 | * @param string $url The attempted embed URL. |
| 253 | * @param array $attr An array of shortcode attributes. |
| 254 | * @param int $post_ID Post ID. |
| 255 | */ |
| 256 | return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID ); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Filters whether to inspect the given URL for discoverable link tags. |
| 262 | * |
| 263 | * @since 2.9.0 |
| 264 | * @since 4.4.0 The default value changed to true. |
| 265 | * |
| Line | Code |
| 330 | |
| 331 | if ( $has_kses ) { |
| 332 | kses_init_filters(); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | // If there was a result, return it. |
| 337 | if ( $html ) { |
| 338 | /** This filter is documented in wp-includes/class-wp-embed.php */ |
| 339 | return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID ); |
| 340 | } |
| 341 | |
| 342 | // Still unknown |
| 343 | return $this->maybe_make_link( $url ); |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Delete all oEmbed caches. Unused by core as of 4.0.0. |
| 348 | * |