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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 |
---|---|
677 | * |
678 | * @param int $post_id Optional. Post ID. |
679 | * @return object Comment stats. |
680 | */ |
681 | function wp_count_comments( $post_id = 0 ) { |
682 | global $wpdb; |
683 |
|
684 | $post_id = (int) $post_id; |
685 |
|
686 | $stats = apply_filters('wp_count_comments', array(), $post_id); |
687 | if ( !empty($stats) ) |
688 | return $stats; |
689 |
|
690 | $count = wp_cache_get("comments-{$post_id}", 'counts'); |
691 |
|
692 | if ( false !== $count ) |
693 | return $count; |
694 |
|
695 | $where = ''; |