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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 |
|---|---|
| 811 | * |
| 812 | * @param int $post_id Optional. Post ID. |
| 813 | * @return object Comment stats. |
| 814 | */ |
| 815 | function wp_count_comments( $post_id = 0 ) { |
| 816 | global $wpdb; |
| 817 | |
| 818 | $post_id = (int) $post_id; |
| 819 | |
| 820 | $stats = apply_filters('wp_count_comments', array(), $post_id); |
| 821 | if ( !empty($stats) ) |
| 822 | return $stats; |
| 823 | |
| 824 | $count = wp_cache_get("comments-{$post_id}", 'counts'); |
| 825 | |
| 826 | if ( false !== $count ) |
| 827 | return $count; |
| 828 | |
| 829 | $where = ''; |