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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 |
---|---|
1361 | * |
1362 | * By default, only post authors are notified of comments. This filter allows |
1363 | * others to be added. |
1364 | * |
1365 | * @since 3.7.0 |
1366 | * |
1367 | * @param array $emails An array of email addresses to receive a comment notification. |
1368 | * @param int $comment_id The comment ID. |
1369 | */ |
1370 | $emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID ); |
1371 | $emails = array_filter( $emails ); |
1372 |
|
1373 | // If there are no addresses to send the comment to, bail. |
1374 | if ( ! count( $emails ) ) { |
1375 | return false; |
1376 | } |
1377 |
|
1378 | // Facilitate unsetting below without knowing the keys. |
1379 | $emails = array_flip( $emails ); |