WordPress at a glance
filter is not described

pingback_ping_source_uri filter-hook . WP 3.6.0

Filters the pingback source URI.


add_filter( 'pingback_ping_source_uri', 'filter_function_name_9321', 10, 2 );
function filter_function_name_9321( $pagelinkedfrom, $pagelinkedto ){
	// filter...

	return $pagelinkedfrom;
URI of the page linked from.
URI of the page linked to.

Where the hook is called

wp-includes/class-wp-xmlrpc-server.php 6340
$pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto );

Where the hook is used (in WP core)

wp-includes/default-filters.php 248
add_filter( 'pingback_ping_source_uri', 'pingback_ping_source_uri' );