Android 微信登入，PHP后端

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1 , 安卓应用， 微信登陆，流程图

2， php端代码

$appid = "";			//开发平台申请
$appsecret =  "";		//开发平台申请
$code = $_GET['code'];	//安卓端提供用户同意登入后的code

//认证
$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".$appsecret."&code=".$code ."&grant_type=authorization_code";

//调用微信api
$http = new \Common\Util\ddhttp;
$rs = $http -> get($url);
if(!$rs)$this -> error('获取OPENID失败');

$rt = json_decode($rs, 1);
if($rt['errcode'])$this -> error('授权失败:'.$rt['errmsg']);

// 拉取用户信息
$url = "https://api.weixin.qq.com/sns/userinfo?access_token=".$rt['access_token']."&openid=".$rt['openid']."&lang=zh_CN ";

$wechat_info = $http -> get($url);
if(!$wechat_info)$this -> error('获取用户资料失败:CURL '.$http -> errmsg);

$wechat_info = json_decode($wechat_info, 1);
if($wechat_info['errcode']){
	$this -> error("获取用户资料失败".$wechat_info['errmsg']);
}

$user_info = array(
	"headimg"=>$wechat_info['headimgurl'],	//头像
	"nickname"=>$wechat_info['nickname'],	//暱称
	"sex"=>$wechat_info['sex'],				//性别
	"openid"=>$wechat_info['openid'],		//app唯一
	"unionid"=>$wechat_info['unionid']		//微信内部唯一，小程序， 公众号， web， 移动应用都是一致的
);

工具类

<?php
namespace Common\Util;
/**
*	http操作类,实现简单的GET和POST操作
*	@author Dragondean
*	@date 2015-05-14
*/
class ddhttp{
	protected $url;	//要请求的地址
	protected $method;	//请求方法
	protected $data;	//数据
	public $errmsg;		//错误信息,返回false的时候可以用来获取详细的错误代码
	public $sslkey = null; 	//sslkey,默认是pem格式
	public $sslcert = null; 	//cert证书，默认是pem格式
	
	/**
	*	GET方式抓取数据
	*	@param string $url 要抓取的URL
	*/
	public function get($url, $data = null){
		$this->url = $url;
		$data && $this->data = $data;
		$this->method = "GET";
		return $this->excrequest();
	}
	
	/**
	*	POST提交数据并返回内容
	*	@param string $url 要请求的地址
	*	@param mixed $data 提交的数据
	*/
	public function post($url, $data = null){
		$this->url = $url;
		$this->method = "POST";
		$this->data = $data;
		return $this->excrequest();
	}
	
	/**
	*	执行请求并返回数据
	*	@access private 
	*/
	private function excrequest(){
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $this->url);
		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $this->method );
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
		curl_setopt($ch, CURLOPT_TIMEOUT, 30);
		
		if($this->sslcert){
			curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
			curl_setopt($ch,CURLOPT_SSLCERT, $this->sslcert);
			//echo $this->sslcert;
		}
		if($this->sslkey){
			curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
			curl_setopt($ch,CURLOPT_SSLKEY, $this->sslkey);
			//echo $this->sslkey;
		}
		//die($this->data);
		curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
		curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $this->data);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$tmpInfo = curl_exec($ch);
		$errorno = curl_errno($ch);
		if(!$errorno)return $tmpInfo;
		else{
			$this->errmsg = $errorno;
			return false;
		}
	}
}
?>