IPN (Instant Payment Notification) links and callback`s
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PayPal: http://yourdomain.com/payment.php?b=check&c=paypal

Skrill: http://yourdomain.com/payment.php?b=check&c=skrill

WebMoney: http://yourdomain.com/payment.php?b=check&c=webmoney&d=result
	  http://yourdomain.com/payment.php?b=check&c=webmoney&d=success
	  http://yourdomain.com/payment.php?b=check&c=webmoney&d=fail

Payeer: http://yourdomain.com/payment.php?b=check&c=payeer

Perfect Money: http://yourdomain.com/payment.php?b=check&c=perfectmoney&d=status
	       http://yourdomain.com/payment.php?b=check&c=perfectmoney&d=complete
	       http://yourdomain.com/payment.php?b=check&c=perfectmoney&d=failed

OKPay: http://yourdomain.com/payment.php?b=check&c=okpay

AdvCash: http://yourdomain.com/payment.php?b=check&c=advcash&d=success
	 http://yourdomain.com/payment.php?b=check&c=advcash&d=fail
	 http://yourdomain.com/payment.php?b=check&c=advcash&d=status

Entromoney: http://yourdomain.com/payment.php?b=check&c=entromoney&d=status
	    http://yourdomain.com/payment.php?b=check&c=entromoney&d=success
	    http://yourdomain.com/payment.php?b=check&c=entromoney&d=fail

Payza: http://yourdomain.com/payment.php?b=check&c=payza&d=results
       http://yourdomain.com/payment.php?b=check&c=payza&d=cancel

SolidTrust Pay: http://yourdomain.com/payment.php?b=check&c=solidtrustpay&d=notify
		http://yourdomain.com/payment.php?b=check&c=solidtrustpay&d=confirm
		http://yourdomain.com/payment.php?b=check&c=solidtrustpay&d=return