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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 |
|---|---|
| 1222 | * The dynamic portion of the hook name, `$feed`, refers to the feed template name. |
| 1223 | * Possible values include: 'rdf', 'rss', 'rss2', and 'atom'. |
| 1224 | * |
| 1225 | * @since 2.1.0 |
| 1226 | * @since 4.4.0 The `$feed` parameter was added. |
| 1227 | * |
| 1228 | * @param bool $is_comment_feed Whether the feed is a comment feed. |
| 1229 | * @param string $feed The feed name. |
| 1230 | */ |
| 1231 | do_action( "do_feed_{$feed}", $wp_query->is_comment_feed, $feed ); |
| 1232 | } |
| 1233 | |
| 1234 | /** |
| 1235 | * Load the RDF RSS 0.91 Feed template. |
| 1236 | * |
| 1237 | * @since 2.1.0 |
| 1238 | * |
| 1239 | * @see load_template() |
| 1240 | */ |