WordPress at a glance
filter is not described

get_to_ping filter-hook . WP 2.0.0

Filters the list of URLs yet to ping for the given post.

Usage

add_filter( 'get_to_ping', 'filter_function_name_5944' );
function filter_function_name_5944( $to_ping ){
	// filter...

	return $to_ping;
}
$to_ping(array)
List of URLs yet to ping.

Where the hook is called

get_to_ping()
wp-includes/post.php 4377
return apply_filters( 'get_to_ping', $to_ping );

Where the hook is used (in WP core)

Does not used.