How to Disable Self Pingbacks in WordPress

// prevent self-pings
function shapeSpace_prevent_self_pings(&$links) {
	
	$home = get_option('home');
	
	foreach ($links as $l => $link) {
		
		if (0 === strpos($link, $home)) unset($links[$l]);
		
	}
	
}
add_action('pre_ping', 'shapeSpace_prevent_self_pings');