thinkphp 生成二维码图片

if (!function_exists('createQRCode')) {
    function createQRCode($url = '', $filename)
    {
        require_once('../vendor/phpqrcode/phpqrcode.php');
        $filename = $filename . '.png';
        $codeDir = date("Y-m-d", time());
        $path = CODE_FILE_DIR . $codeDir;
        if (!file_exists($path)) {
            mkdir($path,0777,true);
        }
        $filePath = $path . '/' . $filename;
        $value = $url;                    //二维码内容
        $errorCorrectionLevel = 'H';    //容错级别
        $matrixPointSize = 30;            //生成图片大小
        //生成二维码图片
        \QRcode::png($value, $filePath, $errorCorrectionLevel, $matrixPointSize, 5);
        $pngPath = $codeDir . '/' . $filename;
        return $pngPath;
    }
}