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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 |
|---|---|
| 2393 | /** |
| 2394 | * Filters whether to send the post author new comment notification emails, |
| 2395 | * overriding the site setting. |
| 2396 | * |
| 2397 | * @since 4.4.0 |
| 2398 | * |
| 2399 | * @param bool $maybe_notify Whether to notify the post author about the new comment. |
| 2400 | * @param int $comment_id The ID of the comment for the notification. |
| 2401 | */ |
| 2402 | $maybe_notify = apply_filters( 'notify_post_author', $maybe_notify, $comment_id ); |
| 2403 | |
| 2404 | /* |
| 2405 | * wp_notify_postauthor() checks if notifying the author of their own comment. |
| 2406 | * By default, it won't, but filters can override this. |
| 2407 | */ |
| 2408 | if ( ! $maybe_notify ) { |
| 2409 | return false; |
| 2410 | } |
| 2411 | |