Generate QR Code Matrix with phpqrcode

In PHP, you can use the phpqrcode library to generate QR codes. The QRcode::png() method can be used to output a pixelated representation of the QR code image.具体的方法调用如下：

QRcode::png('Your QR code data here');

In this method, the data to be used for generating the QR code needs to be passed as a parameter to the QRcode::png() method, which will then create a QR code image represented by a matrix of points. The output of this method can be saved to a file or directly output to a browser.