title: How to validate Android's inapp purchase receipts via PHP/Java?
body: <p>One of our apps on Android is currently quite vulnerable to IAP hacking. We want to avoid this as this will ruin some network-based systems and also harm our revenue.</p>
  
  <p>We would like to know is there a way to validate the purchase receipt before we give him item. Thank you very much.</p>
  
  <p>Also sorry for my extremely bad english, they may sound rude at some point(someone told me) but I am actually being very polite.:)</p>