Online PHP editor | output for bFa33

<?php $String_Header = 'From support@test.co.uk Wed Nov 20 15:48:00 2013 Return-Path: <support@test.co.uk> X-Original-To: mailbox@my.domain.com Delivered-To: mailbox@my.domain.com Delivered-To: techinfo@test.co.uk from: "Lucy 1" <support@lucky1.co.uk>,"Lucy 2" <support@lucky2.co.uk>, "Lucy 3" <support@lucky3.co.uk> to: TestTo <techinfo@test.co.uk>'; function ProcessTicketPostHeaders($headers) { if (is_string($headers)) { $_headersWeWantToKeep = array("from", "to", "cc", "bcc"); $headers = preg_replace('/\r?\n /', ' ', $headers); $_pattern = '/^(' . implode('|', $_headersWeWantToKeep) . '):.*(?:\R(?!(?:(?1)|$)).*)*/m'; if (preg_match_all($_pattern, $headers, $headers)) { $headers = implode("\n", $headers[0]); } } return $headers; } echo '<pre>'; print_r(ProcessTicketPostHeaders($String_Header));