Wechat.php
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<?php
namespace addons\epay\library;
use fast\Http;
use think\Cache;
use think\Session;
/**
* 微信授权
*
*/
class Wechat
{
private $app_id = '';
private $app_secret = '';
private $scope = 'snsapi_userinfo';
public function __construct($app_id, $app_secret)
{
$this->app_id = $app_id;
$this->app_secret = $app_secret;
}
/**
* 获取微信授权链接
*
* @return string
*/
public function getAuthorizeUrl()
{
$redirect_uri = addon_url('epay/api/wechat', [], true, true);
$redirect_uri = urlencode($redirect_uri);
$state = \fast\Random::alnum();
Session::set('state', $state);
return "https://open.weixin.qq.com/connect/oauth2/authorize?appid={$this->app_id}&redirect_uri={$redirect_uri}&response_type=code&scope={$this->scope}&state={$state}#wechat_redirect";
}
/**
* 获取微信openid
*
* @return mixed|string
*/
public function getOpenid()
{
$openid = Session::get('openid');
if (!$openid) {
if (!isset($_GET['code'])) {
$url = $this->getAuthorizeUrl();
Header("Location: $url");
exit();
} else {
$state = Session::get('state');
if ($state == $_GET['state']) {
$code = $_GET['code'];
$token = $this->getAccessToken($code);
$openid = isset($token['openid']) ? $token['openid'] : '';
if ($openid) {
Session::set("openid", $openid);
}
}
}
}
return $openid;
}
/**
* 获取授权token网页授权
*
* @param string $code
* @return mixed|string
*/
public function getAccessToken($code = '')
{
$params = [
'appid' => $this->app_id,
'secret' => $this->app_secret,
'code' => $code,
'grant_type' => 'authorization_code'
];
$ret = Http::sendRequest('https://api.weixin.qq.com/sns/oauth2/access_token', $params, 'GET');
if ($ret['ret']) {
$ar = json_decode($ret['msg'], true);
return $ar;
}
return [];
}
public function getJsticket()
{
$jsticket = Session::get('jsticket');
if (!$jsticket) {
$token = $this->getAccessToken($code);
$params = [
'access_token' => 'token',
'type' => 'jsapi',
];
$ret = Http::sendRequest('https://api.weixin.qq.com/cgi-bin/ticket/getticket', $params, 'GET');
if ($ret['ret']) {
$ar = json_decode($ret['msg'], true);
return $ar;
}
}
return $jsticket;
}
}