$qrcodePath=ROOT_PATH.'uploads/qrcode/'.$uid.'.png';//二维码位置
$posterPath=ROOT_PATH.'uploads/qrcode/poster_'.$uid.'.png';//合成邀请图位置

if(!file_exists($posterPath)){
    $url='XXXXXXXX';
    vendor('wechatpay.phpqrcode.phpqrcode');
    $qrcode = new \QRcode;
    $pngurl = $url;
    
    $qrcode->png($pngurl,$qrcodePath,'M',10,0);
    $this->qrcodeMerge($qrcodePath,$posterPath);
}



function qrcodeMerge($qrcodePath,$posterPath){
    $bigImg = imagecreatefromstring(file_get_contents(ROOT_PATH.'public/static/invit.jpg'));//背景图
    $qCodeImg = imagecreatefromstring(file_get_contents($qrcodePath));
    $newqrcode=imagecreatetruecolor(187, 187);
    
    list($qCodeWidth, $qCodeHight) = getimagesize($qrcodePath);
    imagecopyresized($newqrcode, $qCodeImg,0, 0,0, 0,187, 187, $qCodeWidth, $qCodeHight);
    list($bgWidth, $bgHight) = getimagesize(ROOT_PATH.'public/static/invit.jpg');
    imagecopymerge($bigImg, $newqrcode, 192, 562, 0, 0, 187, 187, 100);
    $img = imagejpeg($bigImg, $posterPath);
    
}