微信网页授权php版本

微信网页授权是服务号才有的高级功能，开发者可以通过授权后获取用户的基本信息；在此之前，想要获取消息信息只能在用户和公众号交互时根据openid获取用户信息；而微信网页授权可在不需要消息交互，也不需要关注的情况下获取用户的基本信息

微信网页授权时通过OAuth2.0完成的，整个过程分为三步：

用户授权，获取code；
根据code获取access_token【可通过refresh_token刷新获取较长有效期】
通过access_token和openid获取用户信息
对微信网页授权过程做了简单封装：

<?php

/**

微信授权相关接口*/
class Wechat {

//高级功能-》开发者模式-》获取
private $app_id = 'xxx';
private $app_secret = 'xxxxxxx';

/**

获取微信授权链接
@param string $redirect_uri 跳转地址
@param mixed $state 参数*/
public function get_authorize_url($redirect_uri = '', $state = '') {

$redirect_uri = urlencode($redirect_uri);
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";
}

/**

获取授权token
@param string $code 通过get_authorize_url获取到的code*/
public function get_access_token($app_id = '', $app_secret = '', $code = '') {

$token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$this->app_id}&secret={$this->app_secret}&code={$code}&grant_type=authorization_code";
$token_data = $this->http($token_url);

if($token_data[0] == 200)
{
return json_decode($token_data[1], TRUE);
}

return FALSE;
}

/**

获取授权后的微信用户信息
@param string $access_token
@param string $open_id*/
public function get_user_info($access_token = '', $open_id = '') {

if($access_token && $open_id)
{
$info_url = "https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$open_id}&lang=zh_CN";
$info_data = $this->http($info_url);

if($info_data[0] == 200)
{

return json_decode($info_data[1], TRUE);

}
}

return FALSE;
}

public function http($url, $method, $postfields = null, $headers = array(), $debug = false) {

$ci = curl_init();
/ Curl settings /
curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ci, CURLOPT_TIMEOUT, 30);
curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);

switch ($method) {
case 'POST':

curl_setopt($ci, CURLOPT_POST, true);
if (!empty($postfields)) {
  curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
  $this->postdata = $postfields;
}
break;

}
curl_setopt($ci, CURLOPT_URL, $url);
curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ci, CURLINFO_HEADER_OUT, true);

$response = curl_exec($ci);
$http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);

if ($debug) {
echo "=====post data======rn";
var_dump($postfields);

echo '=====info=====' . "rn";
print_r(curl_getinfo($ci));

echo '=====$response=====' . "rn";
print_r($response);
}
curl_close($ci);
return array($http_code, $response);
}

}