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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 |
|---|---|
| 1028 | * |
| 1029 | * Normally just post authors are notified of emails. |
| 1030 | * This filter lets you add others. |
| 1031 | * |
| 1032 | * @since 3.7.0 |
| 1033 | * |
| 1034 | * @param array $emails Array of email addresses to receive a comment notification. |
| 1035 | * @param int $comment_id The comment ID. |
| 1036 | */ |
| 1037 | $emails = apply_filters( 'comment_notification_recipients', $emails, $comment_id ); |
| 1038 | $emails = array_filter( $emails ); |
| 1039 | |
| 1040 | // If there are no addresses to send the comment to, bail. |
| 1041 | if ( ! count( $emails ) ) { |
| 1042 | return false; |
| 1043 | } |
| 1044 | |
| 1045 | // Facilitate unsetting below without knowing the keys. |
| 1046 | $emails = array_flip( $emails ); |