Add Extra Facebook Pixel

add_filter('wpcode_get_snippets_for_location', function( $snippets, $location ) {

	if ('site_wide_header' === $location ) {

		foreach ($snippets as $key => $snippet) {

			if ('pixel_facebook' === $snippet->id) {

				$snippets[$key]->code = str_replace("fbq('init'", "fbq('init', 'NEW_PIXEL_ID'); fbq('init'", $snippet->code);

			}

		}

	}

	return $snippets;

}, 12, 2);