PHP pages using two-dimensional code generation

Reception:

<Div class = "xm-wx"> <img src = "http://qr.topscan.com/api.php?text={$ewmurl}"> look sweep the item </ div>

Backstage:

$ ewmurl = 'http: //m.****.com'.$this-> request-> url (); // address and stitching parameters passed to the front desk and show 
$ this-> assign (' ewmurl ' , $ ewmurl);