PHP Decode

function post_to_fastenergy ($xml_string)
{
	if(function_exists("curl_init"))
	{
		$c = curl_init("https://www.holzpellets.net/partner/pellets-rechner_xml/");
		if($c)
		{
			curl_setopt($c, CURLOPT_SSL_VERIFYPEER, 0);
			curl_setopt($c, CURLOPT_SSL_VERIFYHOST, 0);
			curl_setopt($c, CURLOPT_POST, 1);
			curl_setopt($c, CURLOPT_POSTFIELDS, $xml_string);
			curl_setopt($c, CURLOPT_TIMEOUT, PARTNER_POST_TIMEOUT);
			curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
			$out = curl_exec($c);
			curl_close($c);
		}
	}
	else
	{
		$url_array = parse_url("https://www.holzpellets.net/partner/pellets-rechner_xml/");
		$sh = @fsockopen($url_array['host'], 80, $errno, $errstr, PARTNER_POST_TIMEOUT);
		if($sh)
		{
			fputs($sh, "POST " . $url_array['path'] . " HTTP/1.1
");
			fputs($sh, "Host: " . $url_array['host'] . "
");
			fputs($sh, "Content-type: application/x-www-form-urlencoded
");
			fputs($sh, "Content-length: " . strlen($xml_string) . "
");
			fputs($sh, "Connection: close

");
			fputs($sh, $xml_string . "

");
			$response = "";
			while(!feof($sh))
				$response .= fread($sh, 8192);
			fclose($sh);
			$response_array = explode("

", $response);
			$out = $response_array[1];
			$out=substr($out,strpos($out,"<"));
			$out=substr($out,0,strrpos($out,">")+1);
		}
	}

	return $out;
}


function generate_xml_from_post ()
{
	$xml_string ='<?xml version="1.0" encoding="UTF-8" ?>';
	$xml_string.='<preisanfrage>';
	$xml_string.='<partner_id>'.PARTNER_ID.'</partner_id>';
	$xml_string.='<partner_pwd>'.md5(PARTNER_PWD).'</partner_pwd>';
	$xml_string.='<plz>'.$_POST['plz'].'</plz>';
	$xml_string.='<menge>'.$_POST['menge'].'</menge>';
	$xml_string.='<abladestellen>'.$_POST['abladestellen'].'</abladestellen>';
	$xml_string.='</preisanfrage>';

	return $xml_string;
}


function convert_xml_to_array($xml_string)
{
	$xml   = simplexml_load_string($xml_string, 'SimpleXMLElement', LIBXML_NOCDATA);
	$heizoelpreise_array = json_decode(json_encode($xml), TRUE);

	return $heizoelpreise_array;
}