crm/extend/toolkits/QrCodeGen.php

<?php
namespace toolkits;

class QrCodeGen
{

    public static function generateQr($url, $pathname){
    	require_once ('../vendor/phpqrcode/phpqrcode.php');
        $value                = $url; //二维码内容
        $errorCorrectionLevel = 'L';//容错级别
        $matrixPointSize      = 4;//生成图片大小
        //生成二维码图片
        $qrcode = new \QRcode();
        $QR = $qrcode->png($value, $pathname, $errorCorrectionLevel, $matrixPointSize, 2);
        return $QR;
    }
}