PHP Server Side Code

<?php
	function getReceiptData($receipt)
	{
		$fh = fopen('showme.txt',w);
		fwrite($fh,$receipt);
		fclose($fh);
		$endpoint = 'https://sandbox.itunes.apple.com/verifyReceipt';
		
		$ch = curl_init($endpoint);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_POST, true);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $receipt);
		$response = curl_exec($ch);
		$errno = curl_errno($ch);
		$errmsg = curl_error($ch);
		curl_close($ch);
		$msg = $response.' - '.$errno.' - '.$errmsg;
		echo $response;
	}
	
foreach ($_POST as $key=>$value){
	$newcontent .= $key.' '.$value;
}

$new = trim($newcontent);
$new = trim($newcontent);
$new = str_replace('_','+',$new);
$new = str_replace(' =','==',$new);

if (substr_count($new,'=') == 0){
if (strpos('=',$new) === false){
		$new .= '=';
}
}

$new = '{"receipt-data":"'.$new.'","password":"<INSERT YOUR IN-APP PURCHASE SHARED SECRET HERE>"}';
$info = getReceiptData($new);
	?>