PayPal IPN subscription and single payment

Hello, I want PHP script for PayPal IPN 1- a single payment. 2- monthly subscription that will automaticly ( recurring ) * visitor on my website will select one service out of 2 1- one time use/one time payment, he click he get taken to paypal after payment paypal send him back to my website, and paypal send ALL the payment details to my script. ( so my script can create/activate/add credit to his account ) 2- visitor select membership/subscription he click go to paypal and after payment paypal send him back to my website , and also paypal send all his payment details to my script. ( so my script can create/activate/add credit to his account ) at any time a member cancel his subscription ( from his paypal ) paypal send these details to my script so my script also can cancel his membership. No escrow no payment till i see the script working in action. payment $30 for this work not more. thanks,