Barcode Scanner: QRCode adjustment for an existing login

Hi, I have the below code which is working with "Touch". When a user thouch the button then he is required to enter a PIN and then he is logged in. The same is also for logout. Now I want to extend this login and logout precess with a QRCode. Each user will receive his own QRCode and when the QRCode has been scanned then he can login or logout. The entries are going to be inserted into mysq database. I am using a hand Barcode-Scanner from aliexpress: [login to view URL] The below code is php code. Plese consider to adjust this code "function ListOptions_Rendered()" the rest of application will not be touched. // ListOptions Rendered event function ListOptions_Rendered() { If ($this->Inhouse->CurrentValue == 0){ $this->ListOptions->Items["Eintritt"]->Body = "<a href=\"#\" onclick=\"return ([login to view URL]('Enter Your PIN')=='" . $this->Pin->CurrentValue . "'||alert('PIN Incorrect'))&&(alert('PIN Correct')||[login to view URL] (event, { action: 'Eintritt', method: 'ajax',msg: 'Click OK to Login', key: " . $this->KeyToJson(TRUE) . ", success: function() {[login to view URL](true)}}));\"> <i class='fas fa-play-circle fa-3x'></i></a>"; } else{ $this->ListOptions->Items["Austritt"]->Body = "<a href=\"#\" onclick=\"return ([login to view URL]('Enter Your PIN')=='" . $this->Pin->CurrentValue . "'||alert('PIN Incorrect'))&&(alert('PIN Correct')||[login to view URL] (event, { action: 'Austritt', method: 'ajax', msg: 'Click OK to Logout', key: " . $this->KeyToJson(TRUE) . ", success: function() {[login to view URL](true)}}));\"> <i class='fas fa-stop-circle fa-3x'></i></a>"; } }