This function doesn't exist on lighttpd, so I wrote this little function to emulate it:
<?php
if (!function_exists('apache_response_headers')) {
function apache_response_headers () {
$arh = array();
$headers = headers_list();
foreach ($headers as $header) {
$header = explode(":", $header);
$arh[array_shift($header)] = trim(implode(":", $header));
}
return $arh;
}
}
?>