php 微信调用扫一扫

类库代码:

<?php
class JSSDK {
private $appId;
private $appSecret;

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

public function getSignPackage() {
$jsapiTicket = $this->getJsApiTicket();

// 注意 URL 一定要动态获取，不能 hardcode.
$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
$url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

$timestamp = time();

$nonceStr = $this->createNonceStr();

// 这里参数的顺序要按照 key 值 ASCII 码升序排序
$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
//$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
//echo $string;
$signature = sha1($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() {
// jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
$data = json_decode(file_get_contents("/home/wwwroot/zksh.2om.cn/extend/org/jssdk/jsapi_ticket.json"));
if ($data->expire_time < time()) {
$accessToken = $this->getAccessToken();
// 如果是企业号用以下 URL 获取 ticket
// $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
$res = json_decode($this->httpGet($url));
$ticket = $res->ticket;
if ($ticket) {
$data->expire_time = time() + 7000;
$data->jsapi_ticket = $ticket;
$fp = fopen("jsapi_ticket.json", "w");
fwrite($fp, json_encode($data));
fclose($fp);
}
} else {
$ticket = $data->jsapi_ticket;
}

return $ticket;
}

private function getAccessToken() {
// access_token 应该全局存储与更新，以下代码以写入到文件中做示例
$data = json_decode(file_get_contents("/home/wwwroot/zksh.2om.cn/extend/org/jssdk/access_token.json"));
if ($data->expire_time < time()) {
// 如果是企业号用以下URL获取access_token
// $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$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;
$fp = fopen("access_token.json", "w");
fwrite($fp, json_encode($data));
fclose($fp);
}
} else {
$access_token = $data->access_token;
}
return $access_token;
}

private function httpGet($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_URL, $url);

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

return $res;
}
}

jsapi_ticket.json文件代码:

{"jsapi_ticket":"","expire_time":0}

PHP前端页面代码:

<?php
require "extend/org/jssdk/jssdk.php";
$jssdk = new JSSDK("你的AppId", "你的AppSecret");
$signPackage = $jssdk->GetSignPackage();
?>
<!DOCTYPE html>
<html><head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<title>微信扫一扫</title>
</head>
<body>
<h1 id="wxcode" style="text-align: center;">扫一扫</h1>

<script type="text/javascript" src="__JS__/jquery.min.js"></script>
<script src="https://res.wx.qq.com/open/js/jweixin-1.4.0.js"></script>
<script>

console.log('<?php echo $signPackage["appId"];?>');
console.log('<?php echo $signPackage["timestamp"];?>');
console.log('<?php echo $signPackage["nonceStr"];?>');
console.log('<?php echo $signPackage["signature"];?>');

wx.config({
// 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
debug: false,
// 必填，公众号的唯一标识
// appId: "wx259ea197bf8b2eab",
appId: "<?php echo $signPackage["appId"];?>",
// 必填，生成签名的时间戳
timestamp:"<?php echo $signPackage["timestamp"];?>",
// 必填，生成签名的随机串
nonceStr:"<?php echo $signPackage["nonceStr"];?>",
// 必填，签名，见附录1
// signature:"805c5e6f956fa5572b5b3ccc65d7581fe6cd37e1",
signature:"<?php echo $signPackage["signature"];?>",
// 必填，需要使用的JS接口列表，所有JS接口列表见附录2
jsApiList : [ 'scanQRCode' ]
});

wx.error(function(res) {
alert("----------出错了-----------：" + res.errMsg);//这个地方的好处就是wx.config配置错误，会弹出窗口哪里错误，然后根据微信文档查询即可。
});

wx.ready(function() {
wx.checkJsApi({
jsApiList : ['scanQRCode'],
success : function(res) {
// console.log(444);
}
});

//点击按钮扫描二维码
$('#wxcode').click(function(){
// alert(1);
wx.scanQRCode({
needResult: 0, // 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) {
var result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
// alert(222);
}

});
})

});
</script>
</body>
</html>

<--此代码为借鉴网络后,PHP实际可用代码-->