laravel 进行图片合成方法

class QrcodeController extends Controller
{
public function getShareImg($share_code, $f = '')
{ // 生成文件名
$file_name = $share_code . config('PiaoJuBao.FILE_NAME');
$qr_url = config('PiaoJuBao.QR_URL');
// 生成二维码图片
QrCode::format('png')->size(130)->encoding('UTF-8')->errorCorrection('Q')->margin(0)->generate($qr_url . '?paymew=' . $share_code . '&f=' . $f, storage_path('images/') . $file_name . '.png');
$bg = imagecreatefrompng(storage_path('images/bg.png'));
$qrcode = imagecreatefrompng(storage_path('images/') . $file_name . '.png');
imagecopyresampled($bg, $qrcode, 417, 105, 0, 0, 112, 112, imagesx($qrcode), imagesy($qrcode));
imagepng($bg, public_path('images/qrcode/' . strtoupper($file_name) . '.png'));
unlink(storage_path('images/') . $file_name . '.png');
return env('APP_URL') . strtoupper($file_name) . '.png';
}
}