Add a \"Print\" button, with code, to our existing process (PDF explains)

SMARTiPAY is our simple cash payment system created to enable the UK public to pay for various products & services. Convenience stores will use specific Android smartphones to register new players and accept cash for payment into the players’ membership accounts. (Members can then use those credits to pay for entries in our lottery-style games.) The simple procedure is outlined, step-by-step, in the screen captures shown in the attached PDF. We will be insisting that the UK convenience stores use a specific smartphone model AND the printer we will supply. (precise models under test now). Our current PHP script already creates and sends SMS and/or EMAIL receipts with the content shown inside the blue box. Emails also include the QR code. I’d like to use a similar routine to DIRECT PRINT the same email content to the bluetooth printer.... in other words, .................NOT have to copy & paste text into a new “Print screen” .... .................NOR to print a screen-capture image For the best bidders, I'll supply links and login details for our existing web pages and the current (web-view) APK. Thanks for your time and interest so far ... I'm really hoping to build a good working relationship for all the future APPs that we will need in the coming weeks. Thanks Clive Smith ceo Sporting Chance