do_trackbacks()
Function: Performs trackbacks.
Source: wp-includes/comment.php:2969
pingback()
Function: Pings back the links found in a post.
Source: wp-includes/comment.php:3052
get_pung()
Function: Retrieves URLs already pinged for a post.
Source: wp-includes/post.php:5359
get_to_ping()
Function: Retrieves URLs that need to be pinged.
Source: wp-includes/post.php:5388
add_ping()
Function: Adds a URL to those already pinged.
Source: wp-includes/post.php:5280