<?php

$extensions = array(
	"curl" => "cURL",
	"openssl" => "OpenSSL"
);
$functions = array(
	"base64_decode",
	"base64_encode",
	"json_decode",
	"json_encode",
	"urlencode"
);
$phpMin = "5.2.0";

foreach ($extensions as $name => $title) {
	if (!extension_loaded($name)) {
		throw new Exception("This library needs the $title extension.");
	}
}
foreach ($functions as $func) {
	if (!function_exists($func)) {
		throw new Exception("This library needs the '$func' function.");
	}
}

if (!function_exists('getallheaders')) {
	function getallheaders() {
		$headers = array();

		foreach ($_SERVER as $name => $value) {
			if (substr($name, 0, 5) == 'HTTP_') {
				$name = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
				$headers[$name] = $value;
			} else if ($name == "CONTENT_TYPE") {
				$headers["Content-Type"] = $value;
			} else if ($name == "CONTENT_LENGTH") {
				$headers["Content-Length"] = $value;
			} else {
				$headers[$name] = $value;
			}
	   }

	   return $headers;
	}
}

if (version_compare(phpversion(), $phpMin, "<")) {
	throw new Exception("This library needs PHP $phpMin or newer.");
}

require_once(__DIR__ . '/payplug/IPN.php');
require_once(__DIR__ . '/payplug/Parameters.php');
require_once(__DIR__ . '/payplug/PaymentUrl.php');
require_once(__DIR__ . '/payplug/Payplug.php');
require_once(__DIR__ . '/payplug/PayplugExceptions.php');