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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 |
|---|---|
| 1866 | /** |
| 1867 | * Filter whether to send the post author new comment notification emails, |
| 1868 | * overriding the site setting. |
| 1869 | * |
| 1870 | * @since 4.4.0 |
| 1871 | * |
| 1872 | * @param bool $maybe_notify Whether to notify the post author about the new comment. |
| 1873 | * @param int $comment_ID The ID of the comment for the notification. |
| 1874 | */ |
| 1875 | $maybe_notify = apply_filters( 'notify_post_author', $maybe_notify, $comment_ID ); |
| 1876 | |
| 1877 | /* |
| 1878 | * wp_notify_postauthor() checks if notifying the author of their own comment. |
| 1879 | * By default, it won't, but filters can override this. |
| 1880 | */ |
| 1881 | if ( ! $maybe_notify ) { |
| 1882 | return false; |
| 1883 | } |
| 1884 | |