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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 |
|---|---|
| 731 | * |
| 732 | * @param int $post_id An optional post ID to check instead of the current post. |
| 733 | * @return bool True if the comments are open |
| 734 | */ |
| 735 | function comments_open( $post_id=NULL ) { |
| 736 | |
| 737 | $_post = get_post($post_id); |
| 738 | |
| 739 | $open = ( 'open' == $_post->comment_status ); |
| 740 | return apply_filters( 'comments_open', $open, $post_id ); |
| 741 | } |
| 742 | |
| 743 | /** |
| 744 | * Whether the current post is open for pings. |
| 745 | * |
| 746 | * @since 1.5.0 |
| 747 | * @uses $post |
| 748 | * |
| 749 | * @param int $post_id An optional post ID to check instead of the current post. |