PULPALI php proyektimə necə inteqrasiya edə bilərəm?

<?php
	$name_az 	= 'Product name AZ';
	$name_en 	= 'Product name EN';
	$name_ru 	= 'Product name RU';

    $salt		= 111;
    $merchantId = 1111;
    $externalId = 123456789;

    $price 		= 1;
    $fromEpoch 	= floor(time()/300);

    $signature 	= sha1( $name_en . $name_az . $name_ru . $merchantId . $externalId . ($price*100) . $fromEpoch . $salt );
?>

<form action="https://pay.pulpal.az/payment?" method="GET">
	<input type="hidden" name="externalId" value="<?= $externalId ?>" >
	<input type="hidden" name="name_az" value="<?= $name_az ?>">
	<input type="hidden" name="name_ru" value="<?= $name_ru ?>">
	<input type="hidden" name="name_en" value="<?= $name_en ?>">
	<input type="hidden" name="price" value="<?= $price * 100 ?>">
	<input type="hidden" name="signature2" value="<?= $signature ?>">
	<input type="hidden" name="merchantId" value="<?= $merchantId ?>">
	<input type="hidden" name="price_bolkart6" value="<?= $price * 100 ?>">
	<input type="hidden" name="price_tamkart9" value="<?= $price * 100 ?>">
	<input type="hidden" name="price_birkart18" value="<?= $price * 100 ?>">
	<input type="submit" value="Pay now" > 
</form>