WordPress at a glance
filter is not described

pre_remote_source filter-hook . WP 2.5.0

Filters the pingback remote source.

Usage

add_filter( 'pre_remote_source', 'filter_function_name_8358', 10, 2 );
function filter_function_name_8358( $remote_source, $pagelinkedto ){
	// filter...

	return $remote_source;
}
$remote_source(string)
Response source for the page linked from.
$pagelinkedto(string)
URL of the page linked to.

Where the hook is called

wp_xmlrpc_server::pingback_ping()
pre_remote_source
wp-includes/class-wp-xmlrpc-server.php 6437
$remote_source = apply_filters( 'pre_remote_source', $remote_source, $pagelinkedto );

Where the hook is used (in WP core)

Does not used.