VonguePay Payment integration

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PHP

Dear All,

I need small information. I am VonguePay payment gateway integration in to my website using PHP. When My payment Page is completed its redirect to my website.
But how to get response data in my website, if it is success or failed transactions. Please guide me.

My Form is :

<form method='POST' action='https://voguepay.com/pay/'>

<input type='hidden' name='v_merchant_id' value='13189-10745' />
<input type='hidden' name='merchant_ref' value='234-567-890' />
<input type='hidden' name='memo' value='Bulk order from McAckney Web Shop' />

<input type='hidden' name='notify_url' value='http://www.mydomain.com/notification.php' />
<input type='hidden' name='success_url' value='http://www.mydomain.com/thank_you.html' />
<input type='hidden' name='fail_url' value='http://www.mydomain.com/failed.html' />

<input type='hidden' name='developer_code' value='pq7778ehh9YbZ' />
<input type='hidden' name='store_id' value='25' />

<input type='hidden' name='total' value='0.01' />

<input type='image' src='http://voguepay.com/images/buttons/buynow_blue.png' alt='Submit' />

</form>

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Thanks & Regards,
Siva.