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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 |
|---|---|
| 2831 | $post_id = $post->ID; |
| 2832 | |
| 2833 | /** |
| 2834 | * Fires before comments are sent to the trash. |
| 2835 | * |
| 2836 | * @since 2.9.0 |
| 2837 | * |
| 2838 | * @param int $post_id Post ID. |
| 2839 | */ |
| 2840 | do_action( 'trash_post_comments', $post_id ); |
| 2841 | |
| 2842 | $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id) ); |
| 2843 | if ( empty($comments) ) |
| 2844 | return; |
| 2845 | |
| 2846 | // Cache current status for each comment. |
| 2847 | $statuses = array(); |
| 2848 | foreach ( $comments as $comment ) |
| 2849 | $statuses[$comment->comment_ID] = $comment->comment_approved; |