php实现微信公众号扫一扫
环境介绍，这就不多说了
1，配置公众号js安全域名,配置appsecret,配置ip白名单，
2,functios.php
<?php
define("appID", "你的appid");
define("appsecret", "你的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;
}
}
?>
3，index.php 复制以下代码
<?php
require_once("functions.php");
$jssdk=new JSSDK('你的appid','你的appsecret');
$signPackage = $jssdk->GetSignPackage();
?>
<html>
<head>
<title>微信扫一扫</title>
<meta charset="utf-8">
</head>
<body>
<a href="javascript:;">
扫一扫
</a>
</body>
</html>
<script src="https://s3.pstatp.com/cdn/expire-1-M/jquery/3.1.1/jquery.min.js"></script>
<script src="https://res.wx.qq.com/open/js/jweixin-1.4.0.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.resultStr);
// window.location.href=res.resultStr; //跳转链接
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>
4,第一次可能会提示没有wp-token/jsapi_ticket.json文件，你建立一个wp-token文件夹用来保存jsapi_ticket和access_token就可以。如图：
