php获取微信openid

世茂地主 發表於 2019-10-10 17:55:00

使用微信接口，无论是自动登录还是微信支付我们首先需要获取的就是openid,获取openid的方式有两种，一种是在关注的时候进行获取，这种订阅号就可以获取的到，第二种是通过网页授权获取，这种获取需要的是认证服务号。
今天我要说的是第二种网页授权获取openid。
<div class="cnblogs_code">
<pre>1 <?php
2 /**
3 * 微信授权相关接口
4 *
5 * @link http://www.phpddt.com
6*/
7 class Wchat
8 {
9 private $app_id = 'wxaf04d17c0694fd82';
 10 private $app_secret = 'a3df3e828bf6307b2ed9daeb407ee624';
 11 private $state = 'aaaa';
 12 /**
 13 * 获取微信授权链接
 14 *
 15 * @param string $redirect_uri 跳转地址
 16 * @param mixed $state 参数
 17 */
 18 public function get_authorize_url($redirect_uri = '', $state = '')
 19 {
 20 $redirect_uri = urlencode($redirect_uri);
 21 return "https://open.weixin.qq.com/connect/oauth2/authorize?appid={$this->app_id}&redirect_uri={$redirect_uri}&response_type=code&scope=snsapi_userinfo&state={$state}#wechat_redirect";
 22 }
 23 /**
 24 * 获取微信openid
 25 */
 26 public function getOpenid($turl)
 27 {
 28 if (!isset($_GET['code'])) {
 29 //触发微信返回code码
 30 $url = $this->get_authorize_url($turl, $this->state);
 31 Header("Location: $url");
 32 exit();
 33 } else {
 34 //获取code码，以获取openid
 35 $code = $_GET['code'];
 36 $access_info = $this->get_access_token($code);
 37 return $access_info;
 38 }
 39 }
 40 /**
 41 * 获取授权token网页授权
 42 *
 43 * @param string $code 通过get_authorize_url获取到的code
 44 */
 45 public function get_access_token($code = '')
 46 {
 47 $appid = $this->app_id;
 48 $appsecret = $this->app_secret;
 49 $token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" . $appid . "&secret=" . $appsecret . "&code=" . $code . "&grant_type=authorization_code";
 50 //echo $token_url;
 51 $token_data = $this->http($token_url);
 52 // var_dump( $token_data);
 53 if ($token_data == 200) {
 54 $ar = json_decode($token_data, TRUE);
 55 return $ar;
 56 }
 57 return $token_data;
 58 }
 59 public function http($url, $method = '', $postfields = null, $headers = array(), $debug = false)
 60 {
 61 $ci = curl_init();
 62 /* Curl settings */
 63 curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
 64 curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 30);
 65 curl_setopt($ci, CURLOPT_TIMEOUT, 30);
 66 curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
 67 switch ($method) {
 68 case 'POST':
 69 curl_setopt($ci, CURLOPT_POST, true);
 70 if (!empty($postfields)) {
 71 curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
 72 $this->postdata = $postfields;
 73 }
 74 break;
 75 }
 76 curl_setopt($ci, CURLOPT_URL, $url);
 77 curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
 78 curl_setopt($ci, CURLINFO_HEADER_OUT, true);
 79 $response = curl_exec($ci);
 80 $http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
 81 if ($debug) {
 82 echo "=====post data======\r\n";
 83 var_dump($postfields);
 84 echo '=====info=====' . "\r\n";
 85 print_r(curl_getinfo($ci));
 86 echo '=====$response=====' . "\r\n";
 87 print_r($response);
 88 }
 89 curl_close($ci);
 90 return array($http_code, $response);
 91 }
 92 }
 93
 94 //getOpenid($turl)这个方法就是获取openid的方法。
 95 //前端调用代码如下:
 96 $openid=isset($_COOKIE['openid'])?$_COOKIE['openid']:'';
 97 if(empty($openid))
 98 {
 99 $wchat=new wchat();
100 $t_url='http://'.$_SERVER['HTTP_HOST'].'/user.php?act=register';
101 $info=$wchat->getOpenid($t_url);
102 if($info){
103 $openid=$info['openid'];
104 setcookie('openid',$openid,time()+86400*30);
105 }
106 }
107 echo $openid;
108 ?></pre>
</div>
  
来源：https://www.cnblogs.com/clubs/p/11649638.html

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php获取微信openid