Fires when a comment is attempted on a post that does not exist.
do_trackbacks
Perform trackbacks.
discover_pingback_server_uri
Finds a pingback server URI based on the given URL.
comment_save_pre
Filters the comment content before it is updated in the database.
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preprocess_comment
Filters a comment’s data before it is sanitized and inserted into the database.
wp_new_comment
Adds a new comment to the database.
pre_comment_user_ip
Filters the comment author’s IP address before it is set.
pre_comment_content
Filters the comment content before it is set.
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pre_comment_user_agent
Filters the comment author’s browser user agent before it is set.
pre_user_id
This filter is documented in wp-includes/comment.php
wp_set_comment_status
Fires immediately before transitioning a comment’s status from one to another in the database.
wp_blacklist_check
Fires before the comment is tested for blacklisted characters or words.
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wp_blacklist_check
Does comment contain blacklisted characters or words.
comment_flood_trigger
Fires before the comment flood message is triggered.
pre_comment_author_url
This filter is documented in wp-includes/comment.php