pardot-ga-function

/**
 * Finds all Pardot form iframes and appends a ?embedded_on= query parameter to the source.
 * Very useful for fixing the crappy issues with pardot tracking...
 */
add_filter( 'pardot_content', 'pardot_iframe_src_filter', 99, 1 );
function pardot_iframe_src_filter( $content ) {

	global $post;

	$permalink_path = wp_make_link_relative( get_permalink( $post->ID ) );

	$ga = ( isset( $_COOKIE['_ga'] ) && ! empty( $_COOKIE['_ga'] ) ) ? $_COOKIE['_ga'] : null;

	$content = preg_replace( '#\<iframe(.*?)\ssrc\=\"http(s)?:\/\/(www2\.alliedtelecom\.net|go\.pardot\.com)(.*?)\"(.*?)\>#i', '<iframe$1 src="https://go.pardot.com$4/?embedded_on=' . urlencode( $permalink_path ) . '&embedPageName=' . urlencode( $post->post_title ) . ( $ga ? '&_ga=' . urlencode( $ga ) : '' ) . '"$5>',  $content );

	return $content;

}