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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 |
|---|---|
| 237 | * Filters the oEmbed TTL value (time to live). |
| 238 | * |
| 239 | * @since 4.0.0 |
| 240 | * |
| 241 | * @param int $time Time to live (in seconds). |
| 242 | * @param string $url The attempted embed URL. |
| 243 | * @param array $attr An array of shortcode attributes. |
| 244 | * @param int $post_ID Post ID. |
| 245 | */ |
| 246 | $ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_ID ); |
| 247 | |
| 248 | $cache = ''; |
| 249 | $cache_time = 0; |
| 250 | |
| 251 | $cached_post_id = $this->find_oembed_post_id( $key_suffix ); |
| 252 | |
| 253 | if ( $post_ID ) { |
| 254 | $cache = get_post_meta( $post_ID, $cachekey, true ); |
| 255 | $cache_time = get_post_meta( $post_ID, $cachekey_time, true ); |