圆形二维码在线生成-微信小程序码圆形二维码

圆形二维码在线生成-微信小程序圆形二维码

获取小程序码
接口地址：https://api.weixin.qq.com/wxa/getwxacode?access_token=ACCESS_TOKEN

小程序中使用代码：

/获取access_token
    public function get_access_token(){
        $appid = $wx_config['appid'];
        $secret = $wx_config['secret'];
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$secret}";
        return $data = $this->curl_get($url);
    }

    public function curl_get($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);
        $err = curl_error($curl);
        curl_close($curl);
        return $data;
    }
    //获得二维码
    public function get_qrcode() {
        header('content-type:image/gif');
        $uid = 6;
        $data = array();
        $data['scene'] = "uid=" . $uid;
        $data['page'] = "pages/index/index";
        $data = json_encode($data);
        $access = json_decode($this->get_access_token(),true);
        $access_token= $access['access_token'];
        $url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" . $access_token;
        $da = $this->get_http_array($url,$data);

        echo json_encode(array('pictures'=>$da));
        $this->assign('data',$da);
        $this->fetch();

    }
    public function get_http_array($url,$post_data) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        // curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);   //没有这个会自动输出，不用print_r();也会在后面多个1
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
        $output = curl_exec($ch);
        curl_close($ch);
        $out = json_decode($output);
        return $out;
    }

    //微信小程序js文件中查看scene所带的参数
    Page({
      onLoad: function(options) {
        // options 中的 scene 需要使用 decodeURIComponent 才能获取到生成二维码时传入的 scene
        var scene = decodeURIComponent(options.scene)
        consol.log(scene)
      }
    })
    //我这里传的参数为$data['scene'] = "uid=" 10086;
    //使用consol.log(scene);得到的结果为 uid=10086
    //获得uid 的值
var uid = scene.split("=")[1];/

网页里使用：
类库下载地址：http://phpqrcode.sourceforge.net/

include 'phpqrcode.php';    
$value = 'http://www.cnblogs.com/txw1958/'; //二维码内容   
$errorCorrectionLevel = 'L';//容错级别   
$matrixPointSize = 6;//生成图片大小   
//生成二维码图片   
QRcode::png($value, 'qrcode.png', $errorCorrectionLevel, $matrixPointSize, 2);   
$logo = 'logo.png';//准备好的logo图片   
$QR = 'qrcode.png';//已经生成的原始圆形二维码图   

if ($logo !== FALSE) {   
    $QR = imagecreatefromstring(file_get_contents($QR));   
    $logo = imagecreatefromstring(file_get_contents($logo));   
    $QR_width = imagesx($QR);//圆形二维码图片宽度   
    $QR_height = imagesy($QR);//圆形二维码图片高度   
    $logo_width = imagesx($logo);//圆形logo图片宽度   
    $logo_height = imagesy($logo);//圆形logo图片高度   
    $logo_qr_width = $QR_width / 5;   
    $scale = $logo_width/$logo_qr_width;   
    $logo_qr_height = $logo_height/$scale;   
    $from_width = ($QR_width - $logo_qr_width) / 2;   
    //重新组合圆形图片并调整大小   
    imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width,   
    $logo_qr_height, $logo_width, $logo_height);   
}   
//输出图片   
imagepng($QR, 'helloweixin.png');   
echo '<img src="helloweixin.png" />';