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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 |
---|---|
869 | * |
870 | * @param int $post_id Optional. Post ID. |
871 | * @return object Comment stats. |
872 | */ |
873 | function wp_count_comments( $post_id = 0 ) { |
874 | global $wpdb; |
875 |
|
876 | $post_id = (int) $post_id; |
877 |
|
878 | $stats = apply_filters('wp_count_comments', array(), $post_id); |
879 | if ( !empty($stats) ) |
880 | return $stats; |
881 |
|
882 | $count = wp_cache_get("comments-{$post_id}", 'counts'); |
883 |
|
884 | if ( false !== $count ) |
885 | return $count; |
886 |
|
887 | $where = ''; |