PHP实现生成二维码的示例代码

       //临时二维码
    public function getQrls()
{
        $accessToken = $this->_getWxAccessToken();
        $url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={$accessToken}";
        $postArr =  [
            "action_name" => "QR_SCENE",
            "expire_seconds" => 604800,
            "action_info" => [
                'scene' => ['scene_id' => 2000],
              ],
           ];
 
        $postJson = json_encode($postArr);
        $res = $this->ch($url, 'post', 'json', $postJson);
 
        $ticket = $res['ticket'];
        $url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".urlencode($ticket);
 
        echo "<img src='".$url."'>";
 
    }
 
    //永久二维码
    public function getQryj()
{
        $accessToken = $this->_getWxAccessToken();
        $url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={$accessToken}";
        $postArr =  [
            "action_name" => "QR_LIMIT_SCENE",
            "action_info" => [
                'scene' => ['scene_id' => 3000],
              ],
           ];
 
        $postJson = json_encode($postArr);
        $res = $this->ch($url, 'post', 'json', $postJson);
 
        $ticket = $res['ticket'];
        $url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".urlencode($ticket);
 
        echo "<img src='".$url."'>";
    }
     
    //url请求
    private function ch($url, $type='get', $res='json', $arr='')
{
 
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
 
        if ($type == 'post') {
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $arr);
        }
 
        $cnt = curl_exec($ch);
        if (curl_errno($ch)) {
            return;
        }
 
        curl_close($ch);
 
        if ($res == 'json') {
            return json_decode($cnt, true);
        }
 
        return $cnt;
    }