Title: wp-includes/comment.php | Page 3 of 5 | Developer.WordPress.org --- # File: wp-includes/comment.php * hook[pingback_useragent](https://developer.wordpress.org/reference/hooks/pingback_useragent/) * Filters the user agent sent when pinging-back a URL. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pingback_useragent/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pingback_useragent/#uses) | Source: [wp-includes/comment.php:3607](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3607-L3607) * function[privacy_ping_filter()](https://developer.wordpress.org/reference/functions/privacy_ping_filter/) * Checks whether blog is public before returning sites. * Used by [0 functions](https://developer.wordpress.org/reference/functions/privacy_ping_filter/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/privacy_ping_filter/#uses) | Source: [wp-includes/comment.php:3633](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3633-L3639) * function[trackback()](https://developer.wordpress.org/reference/functions/trackback/) * Sends a Trackback. * Used by [2 functions](https://developer.wordpress.org/reference/functions/trackback/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/trackback/#uses) | Source: [wp-includes/comment.php:3656](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3656-L3680) * function[weblog_ping()](https://developer.wordpress.org/reference/functions/weblog_ping/) * Sends a pingback. * Used by [1 function](https://developer.wordpress.org/reference/functions/weblog_ping/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/weblog_ping/#uses) | Source: [wp-includes/comment.php:3690](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3690-L3705) * function[pingback_ping_source_uri()](https://developer.wordpress.org/reference/functions/pingback_ping_source_uri/) * Default filter attached to pingback_ping_source_uri to validate the pingback’s Source URI. * Used by [0 functions](https://developer.wordpress.org/reference/functions/pingback_ping_source_uri/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/pingback_ping_source_uri/#uses) | Source: [wp-includes/comment.php:3717](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3717-L3719) * function[xmlrpc_pingback_error()](https://developer.wordpress.org/reference/functions/xmlrpc_pingback_error/) * Default filter attached to xmlrpc_pingback_error. * Used by [0 functions](https://developer.wordpress.org/reference/functions/xmlrpc_pingback_error/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/xmlrpc_pingback_error/#uses) | Source: [wp-includes/comment.php:3734](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3734-L3739) * function[clean_comment_cache()](https://developer.wordpress.org/reference/functions/clean_comment_cache/) * Removes a comment from the object cache. * Used by [8 functions](https://developer.wordpress.org/reference/functions/clean_comment_cache/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/clean_comment_cache/#uses) | Source: [wp-includes/comment.php:3752](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3752-L3767) * function[update_comment_cache()](https://developer.wordpress.org/reference/functions/update_comment_cache/) * Updates the comment cache of given comments. * Used by [1 function](https://developer.wordpress.org/reference/functions/update_comment_cache/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/update_comment_cache/#uses) | Source: [wp-includes/comment.php:3782](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3782-L3797) * function[_close_comments_for_old_posts()](https://developer.wordpress.org/reference/functions/_close_comments_for_old_posts/) * Closes comments on old posts on the fly, without any extra DB queries. Hooked to the_posts. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_close_comments_for_old_posts/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/_close_comments_for_old_posts/#uses) | Source: [wp-includes/comment.php:3841](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3841-L3869) * hook[close_comments_for_post_types](https://developer.wordpress.org/reference/hooks/close_comments_for_post_types/) * Filters the list of post types to automatically close comments for. * Used by [2 functions](https://developer.wordpress.org/reference/hooks/close_comments_for_post_types/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/close_comments_for_post_types/#uses) | Source: [wp-includes/comment.php:3853](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3853-L3853) * function[_close_comments_for_old_post()](https://developer.wordpress.org/reference/functions/_close_comments_for_old_post/) * Closes comments on an old post. Hooked to comments_open and pings_open. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_close_comments_for_old_post/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/_close_comments_for_old_post/#uses) | Source: [wp-includes/comment.php:3881](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3881-L3913) * hook[preprocess_comment](https://developer.wordpress.org/reference/hooks/preprocess_comment/) * Filters a comment’s data before it is sanitized and inserted into the database. * Used by [1 function](https://developer.wordpress.org/reference/hooks/preprocess_comment/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/preprocess_comment/#uses) | Source: [wp-includes/comment.php:2405](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2405-L2405) * hook[comment_post](https://developer.wordpress.org/reference/hooks/comment_post/) * Fires immediately after a comment is inserted into the database. * Used by [1 function](https://developer.wordpress.org/reference/hooks/comment_post/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_post/#uses) | Source: [wp-includes/comment.php:2491](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2491-L2491) * function[wp_set_comment_status()](https://developer.wordpress.org/reference/functions/wp_set_comment_status/) * Sets the status of a comment. * Used by [7 functions](https://developer.wordpress.org/reference/functions/wp_set_comment_status/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/wp_set_comment_status/#uses) | Source: [wp-includes/comment.php:2795](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2795-L2849) * function[wp_update_comment()](https://developer.wordpress.org/reference/functions/wp_update_comment/) * Updates an existing comment in the database. * Used by [3 functions](https://developer.wordpress.org/reference/functions/wp_update_comment/#used-by) | Uses [21 functions](https://developer.wordpress.org/reference/functions/wp_update_comment/#uses) | Source: [wp-includes/comment.php:2869](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2869-L3021) * hook[comment_save_pre](https://developer.wordpress.org/reference/hooks/comment_save_pre/) * Filters the comment content before it is updated in the database. * Used by [1 function](https://developer.wordpress.org/reference/hooks/comment_save_pre/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_save_pre/#uses) | Source: [wp-includes/comment.php:2925](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2925-L2925) * hook[edit_comment](https://developer.wordpress.org/reference/hooks/edit_comment/) * Fires immediately after a comment is updated in the database. * Used by [1 function](https://developer.wordpress.org/reference/hooks/edit_comment/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/edit_comment/#uses) | Source: [wp-includes/comment.php:3014](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3014-L3014) * function[wp_defer_comment_counting()](https://developer.wordpress.org/reference/functions/wp_defer_comment_counting/) * Determines whether to defer comment counting. * Used by [3 functions](https://developer.wordpress.org/reference/functions/wp_defer_comment_counting/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/wp_defer_comment_counting/#uses) | Source: [wp-includes/comment.php:3036](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3036-L3048) * function[wp_update_comment_count()](https://developer.wordpress.org/reference/functions/wp_update_comment_count/) * Updates the comment count for post(s). * Used by [5 functions](https://developer.wordpress.org/reference/functions/wp_update_comment_count/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_update_comment_count/#uses) | Source: [wp-includes/comment.php:3071](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3071-L3094) * function[wp_update_comment_count_now()](https://developer.wordpress.org/reference/functions/wp_update_comment_count_now/) * Updates the comment count for the post. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_update_comment_count_now/#used-by) | Uses [8 functions](https://developer.wordpress.org/reference/functions/wp_update_comment_count_now/#uses) | Source: [wp-includes/comment.php:3106](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3106-L3165) * hook[wp_update_comment_count](https://developer.wordpress.org/reference/hooks/wp_update_comment_count/) * Fires immediately after a post’s comment count is updated in the database. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_update_comment_count/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_update_comment_count/#uses) | Source: [wp-includes/comment.php:3156](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3156-L3156) * function[discover_pingback_server_uri()](https://developer.wordpress.org/reference/functions/discover_pingback_server_uri/) * Finds a pingback server URI based on the given URL. * Used by [1 function](https://developer.wordpress.org/reference/functions/discover_pingback_server_uri/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/discover_pingback_server_uri/#uses) | Source: [wp-includes/comment.php:3184](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3184-L3260) * function[do_all_pings()](https://developer.wordpress.org/reference/functions/do_all_pings/) * Performs all pingbacks, enclosures, trackbacks, and sends to pingback services. * Used by [0 functions](https://developer.wordpress.org/reference/functions/do_all_pings/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/do_all_pings/#uses) | Source: [wp-includes/comment.php:3268](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3268-L3275) * function[do_trackbacks()](https://developer.wordpress.org/reference/functions/do_trackbacks/) * Performs trackbacks. * Used by [1 function](https://developer.wordpress.org/reference/functions/do_trackbacks/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/do_trackbacks/#uses) | Source: [wp-includes/comment.php:3354](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3354-L3401) * hook[pre_comment_user_ip](https://developer.wordpress.org/reference/hooks/pre_comment_user_ip/) * Filters the comment author’s IP address before it is set. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_comment_user_ip/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_comment_user_ip/#uses) | Source: [wp-includes/comment.php:2294](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2294-L2294) * function[generic_ping()](https://developer.wordpress.org/reference/functions/generic_ping/) * Sends pings to all of the ping site services. * Used by [0 functions](https://developer.wordpress.org/reference/functions/generic_ping/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/generic_ping/#uses) | Source: [wp-includes/comment.php:3411](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3411-L3423) * function[wp_throttle_comment_flood()](https://developer.wordpress.org/reference/functions/wp_throttle_comment_flood/) * Determines whether a comment should be blocked because of comment flood. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_throttle_comment_flood/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/wp_throttle_comment_flood/#uses) | Source: [wp-includes/comment.php:2315](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2315-L2323) * function[pingback()](https://developer.wordpress.org/reference/functions/pingback/) * Pings back the links found in a post. * Used by [1 function](https://developer.wordpress.org/reference/functions/pingback/#used-by) | Uses [12 functions](https://developer.wordpress.org/reference/functions/pingback/#uses) | Source: [wp-includes/comment.php:3514](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3514-L3623) * function[wp_new_comment()](https://developer.wordpress.org/reference/functions/wp_new_comment/) * Adds a new comment to the database. * Used by [4 functions](https://developer.wordpress.org/reference/functions/wp_new_comment/#used-by) | Uses [11 functions](https://developer.wordpress.org/reference/functions/wp_new_comment/#uses) | Source: [wp-includes/comment.php:2372](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L2372-L2494) * hook[pre_ping](https://developer.wordpress.org/reference/hooks/pre_ping/) * Fires just before pinging back links found in a post. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_ping/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_ping/#uses) | Source: [wp-includes/comment.php:3578](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/comment.php#L3578-L3578) [Previous Page](https://developer.wordpress.org/reference/files/wp-includes/comment.php/page/2/?output_format=md) [1](https://developer.wordpress.org/reference/files/wp-includes/comment.php/?output_format=md) [2](https://developer.wordpress.org/reference/files/wp-includes/comment.php/page/2/?output_format=md) 3 [4](https://developer.wordpress.org/reference/files/wp-includes/comment.php/page/4/?output_format=md) [5](https://developer.wordpress.org/reference/files/wp-includes/comment.php/page/5/?output_format=md) [Next Page](https://developer.wordpress.org/reference/files/wp-includes/comment.php/page/4/?output_format=md)