comments_open() WordPress Function

function comments_open( $post_id = null ) {

	$_post = get_post( $post_id );

	$post_id = $_post ? $_post->ID : 0;
	$open    = ( $_post && ( 'open' === $_post->comment_status ) );

	/**
	 * Filters whether the current post is open for comments.
	 *
	 * @since 2.5.0
	 *
	 * @param bool $open    Whether the current post is open for comments.
	 * @param int  $post_id The post ID.
	 */
	return apply_filters( 'comments_open', $open, $post_id );
}
Uses	Description
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.
wp-includes/post.php:get_post()	Retrieves post data given a post ID or post object.
wp-includes/comment-template.php:comments_open	Filters whether the current post is open for comments.
Used By	Description
wp-admin/includes/meta-boxes.php:register_and_do_post_meta_boxes()	Registers the default post meta boxes, and runs the `do_meta_boxes` actions.
wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php:WP_REST_Comments_Controller::create_item_permissions_check()	Checks if a given request has access to create a comment.
wp-includes/embed.php:print_embed_comments_button()	Prints the necessary markup for the embed comments button.
wp-includes/comment.php:wp_handle_comment_submission()	Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.
wp-includes/general-template.php:feed_links_extra()	Display the links to the extra feeds such as category feeds.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::wp_newComment()	Create new comment.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::_prepare_page()	Prepares page data for return in an XML-RPC object.
wp-includes/comment-template.php:get_post_reply_link()	Retrieves HTML content for reply to post link.
wp-includes/comment-template.php:comment_form()	Outputs a complete commenting form for use within a template.
wp-includes/comment-template.php:comments_popup_link()	Displays the link to the comments for the current post ID.
wp-includes/comment-template.php:get_comment_reply_link()	Retrieves HTML content for reply to comment link.