php页面调用微信扫一扫

function.php

<?php
define("appID", "微信公众号appId");
define("appsecret", "");

class JSSDK {
  private $appId;
  private $appSecret;

  public function __construct($appId, $appSecret) {
    $this->appId = $appId;
    $this->appSecret = $appSecret;
  }

  public function getSignPackage() {
    $jsapiTicket = $this->getJsApiTicket();
    $url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
    $timestamp = time();
    $nonceStr = $this->createNonceStr();

    $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url";

    $signature = sha1($string);

    $signPackage = array(
      "appId"     => $this->appId,
      "nonceStr"  => $nonceStr,
      "timestamp" => $timestamp,
      "url"       => $url,
      "signature" => $signature,
      "rawString" => $string
    );
    return $signPackage; 
  }

  private function createNonceStr($length = 16) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
  }

  private function getJsApiTicket() {
    $data = json_decode(file_get_contents("wp-token/jsapi_ticket.json"));
    if ($data->expire_time < time()) {
      $accessToken = $this->getAccessToken();
      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
      $res = json_decode($this->httpGet($url));
      $ticket = $res->ticket;
      if ($ticket) {
        $data->expire_time = time() + 7000;
        $data->jsapi_ticket = $ticket;
        $fp = fopen("wp-token/jsapi_ticket.json", "w");
        fwrite($fp, json_encode($data));
        fclose($fp);
      }
    } else {
      $ticket = $data->jsapi_ticket;
    }

    return $ticket;
  }

  public function getAccessToken() {
    $data = json_decode(file_get_contents("wp-token/access_token.json"));
    if ($data->expire_time < time()) {
      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
      $res = json_decode($this->httpGet($url));
      $access_token = $res->access_token;
      if ($access_token) {
        $data->expire_time = time() + 7000;
        $data->access_token = $access_token;
        $fp = fopen("wp-token/access_token.json", "w");
        fwrite($fp, json_encode($data));
        fclose($fp);
      }
    } else {
      $access_token = $data->access_token;
    }
    return $access_token;
  }

  public function httpGet($url) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    curl_setopt($curl, CURLOPT_URL, $url);

    $res = curl_exec($curl);
    curl_close($curl);

    return $res;
  }
}
?>

test.php

<?php
require_once("functions.php");
$jssdk=new JSSDK(appID,appsecret);
$signPackage = $jssdk->GetSignPackage();
require_once('header.php');
?>
<a href="javascript:;">扫一扫</a>
<?php
require_once('footer.php');
?>
<script src="scripts/jquery/3.1.1/jquery.min.js"></script>
<script src="scripts/jweixin-1.0.0.js"></script>
<script>
  wx.config({
    debug: false,
    appId: '<?php echo $signPackage["appId"];?>',
    timestamp: <?php echo $signPackage["timestamp"];?>,
    nonceStr: '<?php echo $signPackage["nonceStr"];?>',
    signature: '<?php echo $signPackage["signature"];?>',
    jsApiList: [
      // 所有要调用的 API 都要加到这个列表中
	  "scanQRCode"
    ]
  });
  wx.ready(function () {
    // 在这里调用 API
	$(document).on("click","a",function(){
		wx.scanQRCode({
			needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，
			scanType: ["qrCode","barCode"], // 可以指定扫二维码还是一维码，默认二者都有
			success: function (res) {
				//alert(res);
				for(i in res ){
				//  alert(i);           //获得属性 
				  alert(i + "---" + res[i]);  //获得属性值
				}
				//var result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
			}
		});

	})
  });
</script>