php uses PHP QR Code to generate QR code (with logo)_PHP tutorial

//文件输出
include('phpqrcode/phpqrcode.php');

// 二维码数据
$data = 'http://www.bKjia.c0m';

// 生成的文件名
$filename = '1111.png';

// 纠错级别：L、M、Q、H
$errorCorrectionLevel = 'L';

// 点的大小：1到10
$matrixPointSize = 4;
QRcode::png($data, $filename, $errorCorrectionLevel, $matrixPointSize, 2);
?>

//生成中间带logo的二维码
include('phpqrcode/phpqrcode.php');
$value='http://www.bKjia.c0m';
$errorCorrectionLevel = 'L';
$matrixPointSize = 10;
QRcode::png($value, 'xiangyang.png', $errorCorrectionLevel, $matrixPointSize, 2);
echo "QR code generated"."
";
    $logo = 'bdlogo.gif';
    $QR = 'xiangyang.png';
 
    if($logo !== FALSE)
    {
 
        $QR = imagecreatefromstring(file_get_contents($QR));
        $logo = imagecreatefromstring(file_get_contents($logo));
        $QR_width = imagesx($QR);
        $QR_height = imagesy($QR);
        $logo_width = imagesx($logo);
        $logo_height = imagesy($logo);
        $logo_qr_width = $QR_width / 5;
        $scale = $logo_width / $logo_qr_width;
        $logo_qr_height = $logo_height / $scale;
        $from_width = ($QR_width - $logo_qr_width) / 2;
        imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
    }
    imagepng($QR,'xiangyanglog.png');
?>