pingback_ping_source_uri()
Function: Default filter attached to pingback_ping_source_uri to validate the pingback’s Source URI
Source: wp-includes/comment.php:2777
Function: Default filter attached to pingback_ping_source_uri to validate the pingback’s Source URI
Source: wp-includes/comment.php:2777
Function: Default filter attached to xmlrpc_pingback_error.
Source: wp-includes/comment.php:2793
Filter Hook: Filters the XML-RPC pingback error return.
Source: wp-includes/class-wp-xmlrpc-server.php:6614