PHP使用Face++接口开发微信公众平台人脸识别系统的方法

本文实例讲述了PHP使用Face++接口开发微信公众平台人脸识别系统的方法。分享给大家供大家参考。具体如下：

效果图如下：

具体步骤如下：

首先，先登录Face++的官网注册账号：官网链接
注册之后会获取到api_secret和api_key，这些在调用接口的时候需要用到。
然后接下来的就是使用PHP脚本调用API了。
在使用PHP开发微信公共平台的时候，推荐使用Github上的一款不错的框架：wechat-php-sdk
对于微信的常用接口做了一些封装，核心文件wechat.class.php如下：

<?php
/**
 * 微信公众平台PHP-SDK, 官方API部分
 * @author dodge <dodgepudding@gmail.com>
 * @link https://github.com/dodgepudding/wechat-php-sdk
 * @version 1.2
 * usage:
 *  $options = array(
 *     'token'=>'tokenaccesskey', //填写你设定的key
 *     'appid'=>'wxdk1234567890', //填写高级调用功能的app id
 *     'appsecret'=>'xxxxxxxxxxxxxxxxxxx', //填写高级调用功能的密钥
 *   );
 *  $weObj = new Wechat($options);
 *  $weObj->valid();
 *  $type = $weObj->getRev()->getRevType();
 *  switch($type) {
 *     case Wechat::MSGTYPE_TEXT:
 *       $weObj->text("hello, I'm wechat")->reply();
 *       exit;
 *       break;
 *     case Wechat::MSGTYPE_EVENT:
 *       ....
 *       break;
 *     case Wechat::MSGTYPE_IMAGE:
 *       ...
 *       break;
 *     default:
 *       $weObj->text("help info")->reply();
 *  }
 *  //获取菜单操作:
 *  $menu = $weObj->getMenu();
 *  //设置菜单
 *  $newmenu = array(
 *     "button"=>
 *       array(
 *         array('type'=>'click','name'=>'最新消息','key'=>'MENU_KEY_NEWS'),
 *         array('type'=>'view','name'=>'我要搜索','url'=>'http://www.baidu.com'),
 *         )
 *     );
 *  $result = $weObj->createMenu($newmenu);
 */
class Wechat
{
  const MSGTYPE_TEXT = 'text';
  const MSGTYPE_IMAGE = 'image';
  const MSGTYPE_LOCATION = 'location';
  const MSGTYPE_LINK = 'link';
  const MSGTYPE_EVENT = 'event';
  const MSGTYPE_MUSIC = 'music';
  const MSGTYPE_NEWS = 'news';
  const MSGTYPE_VOICE = 'voice';
  const MSGTYPE_VIDEO = 'video';
  const API_URL_PREFIX = 'https://api.weixin.qq.com/cgi-bin';
  const AUTH_URL = '/token?grant_type=client_credential&';
  const MENU_CREATE_URL = '/menu/create?';
  const MENU_GET_URL = '/menu/get?';
  const MENU_DELETE_URL = '/menu/delete?';
  const MEDIA_GET_URL = '/media/get?';
  const QRCODE_CREATE_URL='/qrcode/create?';
  const QR_SCENE = 0;
  const QR_LIMIT_SCENE = 1;
  const QRCODE_IMG_URL='https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=';
  const USER_GET_URL='/user/get?';
  const USER_INFO_URL='/user/info?';
  const GROUP_GET_URL='/groups/get?';
  const GROUP_CREATE_URL='/groups/create?';
  const GROUP_UPDATE_URL='/groups/update?';
  const GROUP_MEMBER_UPDATE_URL='/groups/members/update?';
  const CUSTOM_SEND_URL='/message/custom/send?';
  const OAUTH_PREFIX = 'https://open.weixin.qq.com/connect/oauth2';
  const OAUTH_AUTHORIZE_URL = '/authorize?';
  const OAUTH_TOKEN_PREFIX = 'https://api.weixin.qq.com/sns/oauth2';
  const OAUTH_TOKEN_URL = '/access_token?';
  const OAUTH_REFRESH_URL = '/refresh_token?';
  const OAUTH_USERINFO_URL = 'https://api.weixin.qq.com/sns/userinfo?';
  private $token;
  private $appid;
  private $appsecret;
  private $access_token;
  private $user_token;
  private $_msg;
  private $_funcflag = false;
  private $_receive;
  public $debug = false;
  public $errCode = 40001;
  public $errMsg = "no access";
  private $_logcallback;
  public function __construct($options)
  {
    $this->token = isset($options['token'])?$options['token']:'';
    $this->appid = isset($options['appid'])?$options['appid']:'';
    $this->appsecret = isset($options['appsecret'])?$options['appsecret']:'';
    $this->debug = isset($options['debug'])?$options['debug']:false;
    $this->_logcallback = isset($options['logcallback'])?$options['logcallback']:false;
  }
  /**
   * For weixin server validation
   */
  private function checkSignature()
  {
    $signature = isset($_GET["signature"])?$_GET["signature"]:'';
    $timestamp = isset($_GET["timestamp"])?$_GET["timestamp"]:'';
    $nonce = isset($_GET["nonce"])?$_GET["nonce"]:'';
    $token = $this->token;
    $tmpArr = array($token, $timestamp, $nonce);
    sort($tmpArr, SORT_STRING);
    $tmpStr = implode( $tmpArr );
    $tmpStr = sha1( $tmpStr );
    if( $tmpStr == $signature ){
      return true;
    }else{
      return false;
    }
  }
  /**
   * For weixin server validation
   * @param bool $return 是否返回
   */
  public function valid($return=false)
  {
    $echoStr = isset($_GET["echostr"]) ? $_GET["echostr"]: '';
    if ($return) {
        if ($echoStr) {
          if ($this->checkSignature())
            return $echoStr;
          else
            return false;
        } else
          return $this->checkSignature();
    } else {
        if ($echoStr) {
          if ($this->checkSignature())
            die($echoStr);
          else
            die('no access');
        } else {
          if ($this->checkSignature())
            return true;
          else
            die('no access');
        }
    }
    return false;
  }
  /**
   * 设置发送消息
   * @param array $msg 消息数组
   * @param bool $append 是否在原消息数组追加
   */
  public function Message($msg = '',$append = false){
      if (is_null($msg)) {
        $this->_msg =array();
      }elseif (is_array($msg)) {
        if ($append)
          $this->_msg = array_merge($this->_msg,$msg);
        else
          $this->_msg = $msg;
        return $this->_msg;
      } else {
        return $this->_msg;
      }
  }
  public function setFuncFlag($flag) {
      $this->_funcflag = $flag;
      return $this;
  }
  private function log($log){
      if ($this->debug && function_exists($this->_logcallback)) {
        if (is_array($log)) $log = print_r($log,true);
        return call_user_func($this->_logcallback,$log);
      }
  }
  /**
   * 获取微信服务器发来的信息
   */
  public function getRev()
  {
    if ($this->_receive) return $this;
    $postStr = file_get_contents("php://input");
    $this->log($postStr);
    if (!empty($postStr)) {
      $this->_receive = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
    }
    return $this;
  }
  /**
   * 获取微信服务器发来的信息
   */
  public function getRevData()
  {
    return $this->_receive;
  }
  /**
   * 获取消息发送者
   */
  public function getRevFrom() {
    if (isset($this->_receive['FromUserName']))
      return $this->_receive['FromUserName'];
    else
      return false;
  }
  /**
   * 获取消息接受者
   */
  public function getRevTo() {
    if (isset($this->_receive['ToUserName']))
      return $this->_receive['ToUserName'];
    else
      return false;
  }
  /**
   * 获取接收消息的类型
   */
  public function getRevType() {
    if (isset($this->_receive['MsgType']))
      return $this->_receive['MsgType'];
    else
      return false;
  }
  /**
   * 获取消息ID
   */
  public function getRevID() {
    if (isset($this->_receive['MsgId']))
      return $this->_receive['MsgId'];
    else
      return false;
  }
  /**
   * 获取消息发送时间
   */
  public function getRevCtime() {
    if (isset($this->_receive['CreateTime']))
      return $this->_receive['CreateTime'];
    else
      return false;
  }
  /**
   * 获取接收消息内容正文
   */
  public function getRevContent(){
    if (isset($this->_receive['Content']))
      return $this->_receive['Content'];
    else if (isset($this->_receive['Recognition'])) //获取语音识别文字内容，需申请开通
      return $this->_receive['Recognition'];
    else
      return false;
  }
  /**
   * 获取接收消息图片
   */
  public function getRevPic(){
    if (isset($this->_receive['PicUrl']))
      return $this->_receive['PicUrl'];
    else
      return false;
  }
  /**
   * 获取接收消息链接
   */
  public function getRevLink(){
    if (isset($this->_receive['Url'])){
      return array(
        'url'=>$this->_receive['Url'],
        'title'=>$this->_receive['Title'],
        'description'=>$this->_receive['Description']
      );
    } else
      return false;
  }
  /**
   * 获取接收地理位置
   */
  public function getRevGeo(){
    if (isset($this->_receive['Location_X'])){
      return array(
        'x'=>$this->_receive['Location_X'],
        'y'=>$this->_receive['Location_Y'],
        'scale'=>$this->_receive['Scale'],
        'label'=>$this->_receive['Label']
      );
    } else
      return false;
  }
  /**
   * 获取接收事件推送
   */
  public function getRevEvent(){
    if (isset($this->_receive['Event'])){
      return array(
        'event'=>$this->_receive['Event'],
        'key'=>$this->_receive['EventKey'],
      );
    } else
      return false;
  }
  /**
   * 获取接收语言推送
   */
  public function getRevVoice(){
    if (isset($this->_receive['MediaId'])){
      return array(
        'mediaid'=>$this->_receive['MediaId'],
        'format'=>$this->_receive['Format'],
      );
    } else
      return false;
  }
  /**
   * 获取接收视频推送
   */
  public function getRevVideo(){
    if (isset($this->_receive['MediaId'])){
      return array(
          'mediaid'=>$this->_receive['MediaId'],
          'thumbmediaid'=>$this->_receive['ThumbMediaId']
      );
    } else
      return false;
  }
  /**
   * 获取接收TICKET
   */
  public function getRevTicket(){
  if (isset($this->_receive['Ticket'])){
    return $this->_receive['Ticket'];
  } else
    return false;
  }
  /**
   * 获取二维码的场景值
   */
  public function getRevSceneId (){
    if (isset($this->_receive['EventKey'])){
      return str_replace('qrscene_','',$this->_receive['EventKey']);
    } else{
      return false;
    }
  }
  public static function xmlSafeStr($str)
  {
    return '<![CDATA['.preg_replace("/[\\x00-\\x08\\x0b-\\x0c\\x0e-\\x1f]/",'',$str).']]>';
  }
  /**
   * 数据XML编码
   * @param mixed $data 数据
   * @return string
   */
  public static function data_to_xml($data) {
    $xml = '';
    foreach ($data as $key => $val) {
      is_numeric($key) && $key = "item id=\"$key\"";
      $xml  .= "<$key>";
      $xml  .= ( is_array($val) || is_object($val)) ? self::data_to_xml($val) : self::xmlSafeStr($val);
      list($key, ) = explode(' ', $key);
      $xml  .= "</$key>";
    }
    return $xml;
  }
  /**
   * XML编码
   * @param mixed $data 数据
   * @param string $root 根节点名
   * @param string $item 数字索引的子节点名
   * @param string $attr 根节点属性
   * @param string $id  数字索引子节点key转换的属性名
   * @param string $encoding 数据编码
   * @return string
  */
  public function xml_encode($data, $root='xml', $item='item', $attr='', $id='id', $encoding='utf-8') {
    if(is_array($attr)){
      $_attr = array();
      foreach ($attr as $key => $value) {
        $_attr[] = "{$key}=\"{$value}\"";
      }
      $attr = implode(' ', $_attr);
    }
    $attr  = trim($attr);
    $attr  = empty($attr) ? '' : " {$attr}";
    $xml  = "<{$root}{$attr}>";
    $xml  .= self::data_to_xml($data, $item, $id);
    $xml  .= "</{$root}>";
    return $xml;
  }
  /**
   * 设置回复消息
   * Examle: $obj->text('hello')->reply();
   * @param string $text
   */
  public function text($text='')
  {
    $FuncFlag = $this->_funcflag ? 1 : 0;
    $msg = array(
      'ToUserName' => $this->getRevFrom(),
      'FromUserName'=>$this->getRevTo(),
      'MsgType'=>self::MSGTYPE_TEXT,
      'Content'=>$text,
      'CreateTime'=>time(),
      'FuncFlag'=>$FuncFlag
    );
    $this->Message($msg);
    return $this;
  }
  /**
   * 设置回复音乐
   * @param string $title
   * @param string $desc
   * @param string $musicurl
   * @param string $hgmusicurl
   */
  public function music($title,$desc,$musicurl,$hgmusicurl='') {
    $FuncFlag = $this->_funcflag ? 1 : 0;
    $msg = array(
      'ToUserName' => $this->getRevFrom(),
      'FromUserName'=>$this->getRevTo(),
      'CreateTime'=>time(),
      'MsgType'=>self::MSGTYPE_MUSIC,
      'Music'=>array(
        'Title'=>$title,
        'Description'=>$desc,
        'MusicUrl'=>$musicurl,
        'HQMusicUrl'=>$hgmusicurl
      ),
      'FuncFlag'=>$FuncFlag
    );
    $this->Message($msg);
    return $this;
  }
  /**
   * 设置回复图文
   * @param array $newsData
   * 数组结构:
   * array(
   *   [0]=>array(
   *     'Title'=>'msg title',
   *     'Description'=>'summary text',
   *     'PicUrl'=>'http://www.domain.com/1.jpg',
   *     'Url'=>'http://www.domain.com/1.html'
   *   ),
   *   [1]=>....
   * )
   */
  public function news($newsData=array())
  {
    $FuncFlag = $this->_funcflag ? 1 : 0;
    $count = count($newsData);
    $msg = array(
      'ToUserName' => $this->getRevFrom(),
      'FromUserName'=>$this->getRevTo(),
      'MsgType'=>self::MSGTYPE_NEWS,
      'CreateTime'=>time(),
      'ArticleCount'=>$count,
      'Articles'=>$newsData,
      'FuncFlag'=>$FuncFlag
    );
    $this->Message($msg);
    return $this;
  }
  /**
   *
   * 回复微信服务器, 此函数支持链式操作
   * @example $this->text('msg tips')->reply();
   * @param string $msg 要发送的信息, 默认取$this->_msg
   * @param bool $return 是否返回信息而不抛出到浏览器 默认:否
   */
  public function reply($msg=array(),$return = false)
  {
    if (empty($msg))
      $msg = $this->_msg;
    $xmldata= $this->xml_encode($msg);
    $this->log($xmldata);
    if ($return)
      return $xmldata;
    else
      echo $xmldata;
  } 

  /**
   * GET 请求
   * @param string $url
   */
  private function http_get($url){
    $oCurl = curl_init();
    if(stripos($url,"https://")!==FALSE){
      curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
      curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, FALSE);
    }
    curl_setopt($oCurl, CURLOPT_URL, $url);
    curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
    $sContent = curl_exec($oCurl);
    $aStatus = curl_getinfo($oCurl);
    curl_close($oCurl);
    if(intval($aStatus["http_code"])==200){
      return $sContent;
    }else{
      return false;
    }
  }
  /**
   * POST 请求
   * @param string $url
   * @param array $param
   * @return string content
   */
  private function http_post($url,$param){
    $oCurl = curl_init();
    if(stripos($url,"https://")!==FALSE){
      curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
      curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, false);
    }
    if (is_string($param)) {
      $strPOST = $param;
    } else {
      $aPOST = array();
      foreach($param as $key=>$val){
        $aPOST[] = $key."=".urlencode($val);
      }
      $strPOST = join("&", $aPOST);
    }
    curl_setopt($oCurl, CURLOPT_URL, $url);
    curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
    curl_setopt($oCurl, CURLOPT_POST,true);
    curl_setopt($oCurl, CURLOPT_POSTFIELDS,$strPOST);
    $sContent = curl_exec($oCurl);
    $aStatus = curl_getinfo($oCurl);
    curl_close($oCurl);
    if(intval($aStatus["http_code"])==200){
      return $sContent;
    }else{
      return false;
    }
  }
  /**
   * 通用auth验证方法，暂时仅用于菜单更新操作
   * @param string $appid
   * @param string $appsecret
   */
  public function checkAuth($appid='',$appsecret=''){
    if (!$appid || !$appsecret) {
      $appid = $this->appid;
      $appsecret = $this->appsecret;
    }
    //TODO: get the cache access_token
    $result = $this->http_get(self::API_URL_PREFIX.self::AUTH_URL.'appid='.$appid.'&secret='.$appsecret);
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      $this->access_token = $json['access_token'];
      $expire = $json['expires_in'] ? intval($json['expires_in'])-100 : 3600;
      //TODO: cache access_token
      return $this->access_token;
    }
    return false;
  }
  /**
   * 删除验证数据
   * @param string $appid
   */
  public function resetAuth($appid=''){
    $this->access_token = '';
    //TODO: remove cache
    return true;
  }
  /**
   * 微信api不支持中文转义的json结构
   * @param array $arr
   */
  static function json_encode($arr) {
    $parts = array ();
    $is_list = false;
    //Find out if the given array is a numerical array
    $keys = array_keys ( $arr );
    $max_length = count ( $arr ) - 1;
    if (($keys [0] === 0) && ($keys [$max_length] === $max_length )) { //See if the first key is 0 and last key is length - 1
      $is_list = true;
      for($i = 0; $i < count ( $keys ); $i ++) { //See if each key correspondes to its position
        if ($i != $keys [$i]) { //A key fails at position check.
          $is_list = false; //It is an associative array.
          break;
        }
      }
    }
    foreach ( $arr as $key => $value ) {
      if (is_array ( $value )) { //Custom handling for arrays
        if ($is_list)
          $parts [] = self::json_encode ( $value ); /* :RECURSION: */
        else
          $parts [] = '"' . $key . '":' . self::json_encode ( $value ); /* :RECURSION: */
      } else {
        $str = '';
        if (! $is_list)
          $str = '"' . $key . '":';
        //Custom handling for multiple data types
        if (is_numeric ( $value ) && $value<2000000000)
          $str .= $value; //Numbers
        elseif ($value === false)
        $str .= 'false'; //The booleans
        elseif ($value === true)
        $str .= 'true';
        else
          $str .= '"' . addslashes ( $value ) . '"'; //All other things
        // :TODO: Is there any more datatype we should be in the lookout for? (Object?)
        $parts [] = $str;
      }
    }
    $json = implode ( ',', $parts );
    if ($is_list)
      return '[' . $json . ']'; //Return numerical JSON
    return '{' . $json . '}'; //Return associative JSON
  }
  /**
   * 创建菜单
   * @param array $data 菜单数组数据
   * example:
   {
   "button":[
   {
   "type":"click",
   "name":"今日歌曲",
   "key":"MENU_KEY_MUSIC"
   },
   {
   "type":"view",
   "name":"歌手简介",
   "url":"http://www.qq.com/"
   },
   {
   "name":"菜单",
   "sub_button":[
   {
   "type":"click",
   "name":"hello word",
   "key":"MENU_KEY_MENU"
   },
   {
   "type":"click",
   "name":"赞一下我们",
   "key":"MENU_KEY_GOOD"
   }]
   }]
   }
   */
  public function createMenu($data){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_post(self::API_URL_PREFIX.self::MENU_CREATE_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return true;
    }
    return false;
  }
  /**
   * 获取菜单
   * @return array('menu'=>array(....s))
   */
  public function getMenu(){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::MENU_GET_URL.'access_token='.$this->access_token);
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 删除菜单
   * @return boolean
   */
  public function deleteMenu(){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::MENU_DELETE_URL.'access_token='.$this->access_token);
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return true;
    }
    return false;
  }
  /**
   * 根据媒体文件ID获取媒体文件
   * @param string $media_id 媒体文件id
   * @return raw data
   */
  public function getMedia($media_id){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::MEDIA_GET_URL.'access_token='.$this->access_token.'&media_id='.$media_id);
    if ($result)
    {
      $json = json_decode($result,true);
      if (isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 创建二维码ticket
   * @param int $scene_id 自定义追踪id
   * @param int $type 0:临时二维码；1:永久二维码(此时expire参数无效)
   * @param int $expire 临时二维码有效期，最大为1800秒
   * @return array('ticket'=>'qrcode字串','expire_seconds'=>1800)
   */
  public function getQRCode($scene_id,$type=0,$expire=1800){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $data = array(
      'action_name'=>$type?"QR_LIMIT_SCENE":"QR_SCENE",
      'expire_seconds'=>$expire,
      'action_info'=>array('scene'=>array('scene_id'=>$scene_id))
    );
    if ($type == 1) {
      unset($data['expire_seconds']);
    }
    $result = $this->http_post(self::API_URL_PREFIX.self::QRCODE_CREATE_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 获取二维码图片
   * @param string $ticket 传入由getQRCode方法生成的ticket参数
   * @return string url 返回http地址
   */
  public function getQRUrl($ticket) {
    return self::QRCODE_IMG_URL.$ticket;
  }
  /**
   * 批量获取关注用户列表
   * @param unknown $next_openid
   */
  public function getUserList($next_openid=''){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::USER_GET_URL.'access_token='.$this->access_token.'&next_openid='.$next_openid);
    if ($result)
    {
      $json = json_decode($result,true);
      if (isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 获取关注者详细信息
   * @param string $openid
   * @return array
   */
  public function getUserInfo($openid){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::USER_INFO_URL.'access_token='.$this->access_token.'&openid='.$openid);
    if ($result)
    {
      $json = json_decode($result,true);
      if (isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 获取用户分组列表
   * @return boolean|array
   */
  public function getGroup(){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_get(self::API_URL_PREFIX.self::GROUP_GET_URL.'access_token='.$this->access_token);
    if ($result)
    {
      $json = json_decode($result,true);
      if (isset($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 新增自定分组
   * @param string $name 分组名称
   * @return boolean|array
   */
  public function createGroup($name){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $data = array(
        'group'=>array('name'=>$name)
    );
    $result = $this->http_post(self::API_URL_PREFIX.self::GROUP_CREATE_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 更改分组名称
   * @param int $groupid 分组id
   * @param string $name 分组名称
   * @return boolean|array
   */
  public function updateGroup($groupid,$name){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $data = array(
        'group'=>array('id'=>$groupid,'name'=>$name)
    );
    $result = $this->http_post(self::API_URL_PREFIX.self::GROUP_UPDATE_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 移动用户分组
   * @param int $groupid 分组id
   * @param string $openid 用户openid
   * @return boolean|array
   */
  public function updateGroupMembers($groupid,$openid){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $data = array(
        'openid'=>$openid,
        'to_groupid'=>$groupid
    );
    $result = $this->http_post(self::API_URL_PREFIX.self::GROUP_MEMBER_UPDATE_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * 发送客服消息
   * @param array $data 消息结构{"touser":"OPENID","msgtype":"news","news":{...}}
   * @return boolean|array
   */
  public function sendCustomMessage($data){
    if (!$this->access_token && !$this->checkAuth()) return false;
    $result = $this->http_post(self::API_URL_PREFIX.self::CUSTOM_SEND_URL.'access_token='.$this->access_token,self::json_encode($data));
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
  /**
   * oauth 授权跳转接口
   * @param string $callback 回调URI
   * @return string
   */
  public function getOauthRedirect($callback,$state='',$scope='snsapi_userinfo'){
    return self::OAUTH_PREFIX.self::OAUTH_AUTHORIZE_URL.'appid='.$this->appid.'&redirect_uri='.urlencode($callback).'&response_type=code&scope='.$scope.'&state='.$state.'#wechat_redirect';
  }
  /*
   * 通过code获取Access Token
   * @return array {access_token,expires_in,refresh_token,openid,scope}
   */
  public function getOauthAccessToken(){
    $code = isset($_GET['code'])?$_GET['code']:'';
    if (!$code) return false;
    $result = $this->http_get(self::OAUTH_TOKEN_PREFIX.self::OAUTH_TOKEN_URL.'appid='.$this->appid.'&secret='.$this->appsecret.'&code='.$code.'&grant_type=authorization_code');
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      $this->user_token = $json['access_token'];
      return $json;
    }
    return false;
  }
  /**
   * 刷新access token并续期
   * @param string $refresh_token
   * @return boolean|mixed
   */
  public function getOauthRefreshToken($refresh_token){
    $result = $this->http_get(self::OAUTH_TOKEN_PREFIX.self::OAUTH_REFRESH_URL.'appid='.$this->appid.'&grant_type=refresh_token&refresh_token='.$refresh_token);
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      $this->user_token = $json['access_token'];
      return $json;
    }
    return false;
  }
  /**
   * 获取授权后的用户资料
   * @param string $access_token
   * @param string $openid
   * @return array {openid,nickname,sex,province,city,country,headimgurl,privilege}
   */
  public function getOauthUserinfo($access_token,$openid){
    $result = $this->http_get(self::OAUTH_USERINFO_URL.'access_token='.$access_token.'&openid='.$openid);
    if ($result)
    {
      $json = json_decode($result,true);
      if (!$json || !empty($json['errcode'])) {
        $this->errCode = $json['errcode'];
        $this->errMsg = $json['errmsg'];
        return false;
      }
      return $json;
    }
    return false;
  }
}

接下来就是接口对应的index.php文件，处理微信服务器发送来的信息。
因为是工作室的微信公共账号，所以未做任何修改源码搬上来，截取有用的部分即可：

<?php
/**
 * WeeGo工作室微信公众平台接口源码
 * @author CallMeWhy <wanghaiyang@139.me>
 * @version 1.0
 */
include "wechat.class.php";
$options = array
(
  'token'=>'weego',
  'debug'=>true,
  'logcallback'=>'logdebug'
);
$weObj = new Wechat($options);
// 验证
$weObj->valid();
// 获取内容
$weObj->getRev();
// 获取用户的OpenID
$fromUsername = $weObj->getRevFrom();
// 获取接受信息的类型
$type = $weObj->getRev()->getRevType(); 

//**********关注操作则写入数据库**********/
if($weObj->getRevSubscribe())
{
  // 获取用户OPENID并写入数据库
  $mysql = new SaeMysql();
  $sql = "INSERT INTO `users` (`wxid`) VALUES ('" . $fromUsername . "');";
  $mysql->runSql($sql);
  $mysql->closeDb();
  // 获得信息的类型
  $news = array
  (
    array
    (
      'Title'=>'欢迎关注WeeGo工作室',
      'Description'=>'发送任意内容查看最新开发进展',
      'PicUrl'=>'http://233.weego.sinaapp.com/images/weego_400_200.png',
    )
  );
  $weObj->news($news)->reply();
}
//**********取消关注操作则删除数据库**********/
if($weObj->getRevUnsubscribe())
{
  // 获取用户OPENID并从数据库删除
  $mysql = new SaeMysql();
  $sql = "DELETE FROM `users` WHERE `wxid` = '" . $fromUsername . "'";
  $mysql->runSql($sql);
  $mysql->closeDb();
}
switch($type) {
  case Wechat::MSGTYPE_TEXT:
    /**********文字信息**********/
    $news = array
    (
      array
      (
        'Title'=>"欢迎光临WeeGo工作室",
        'PicUrl'=>'http://233.weego.sinaapp.com/images/weego_400_200.png',
        //'Url'=>'http://233.weego.sinaapp.com/web/home.php?wxid='.$fromUsername
      ),
      array
      (
        'Title'=>"功能1：发送图片可以查询照片中人脸的年龄和性别信息哦",
        'PicUrl'=>'http://233.weego.sinaapp.com/images/face.jpg',
        //'Url'=>'http://233.weego.sinaapp.com/web/home.php?wxid='.$fromUsername
      ),
      array
      (
        'Title'=>"功能2：发送一张两人合影的照片可以计算两人的相似程度",
        'PicUrl'=>'http://233.weego.sinaapp.com/images/mask.png',
        //'Url'=>'http://233.weego.sinaapp.com/web/home.php?wxid='.$fromUsername
      ),
      array
      (
        'Title'=>"功能3：山东大学绩点查询签到等功能正在开发中敬请期待",
        'PicUrl'=>'http://233.weego.sinaapp.com/images/sdu.jpg',
        //'Url'=>'http://233.weego.sinaapp.com/web/home.php?wxid='.$fromUsername
      )
    );
    // 开发人员通道
    if($weObj->getRev()->getRevContent() === "why"){
      $news = array
      (
        array
        (
          'Title'=>'开发人员通道',
          'Description'=>'开发人员通道',
          'PicUrl'=>'http://233.weego.sinaapp.com/images/weego_400_200.png',
          'Url'=>'http://233.weego.sinaapp.com/web/home.php?wxid='.$fromUsername
        )
      );
    }
    $weObj->news($news)->reply();
    exit;
    break;
  case Wechat::MSGTYPE_EVENT:
    break;
  case Wechat::MSGTYPE_IMAGE:
    /**********图片信息**********/
    $imgUrl = $weObj->getRev()->getRevPic();
    $resultStr = face($imgUrl);
    $weObj->text($resultStr)->reply();
    break;
  default:
    $weObj->text("Default")->reply();
}
// 调用人脸识别的API返回识别结果
function face($imgUrl)
{
  // face++ 链接
  $jsonStr =
    file_get_contents("http://apicn.faceplusplus.com/v2/detection/detect?url=".$imgUrl."&api_key=5eb2c984ad24ffc08c352bdb53ee52f8&api_secret=ViX19uvxkT_A0a6d55Hb0Q0QGMTqZ95f&&attribute=glass,pose,gender,age,race,smiling");
  $replyDic = json_decode($jsonStr);
  $resultStr = "";
  $faceArray = $replyDic->{'face'};
  $resultStr .= "图中共检测到".count($faceArray)."张脸！\n";
  for ($i= 0;$i< count($faceArray); $i++){
    $resultStr .= "第".($i+1)."张脸\n";
    $tempFace = $faceArray[$i];
    // 获取所有属性
    $tempAttr = $tempFace->{'attribute'};
    // 年龄：包含年龄分析结果
    // value的值为一个非负整数表示估计的年龄, range表示估计年龄的正负区间
    $tempAge = $tempAttr->{'age'};
    // 性别：包含性别分析结果
    // value的值为Male/Female, confidence表示置信度
    $tempGenger = $tempAttr->{'gender'};
    // 种族：包含人种分析结果
    // value的值为Asian/White/Black, confidence表示置信度
    $tempRace = $tempAttr->{'race'};
    // 微笑：包含微笑程度分析结果
    //value的值为0-100的实数，越大表示微笑程度越高
    $tempSmiling = $tempAttr->{'smiling'};
    // 眼镜：包含眼镜佩戴分析结果
    // value的值为None/Dark/Normal, confidence表示置信度
    $tempGlass = $tempAttr->{'glass'};
    // 造型：包含脸部姿势分析结果
    // 包括pitch_angle, roll_angle, yaw_angle
    // 分别对应抬头，旋转（平面旋转），摇头
    // 单位为角度。
    $tempPose = $tempAttr->{'pose'};
    //返回年龄
    $minAge = $tempAge->{'value'} - $tempAge->{'range'};
    $minAge = $minAge < 0 ? 0 : $minAge;
    $maxAge = $tempAge->{'value'} + $tempAge->{'range'};
    $resultStr .= "年龄：".$minAge."-".$maxAge."岁\n";
    // 返回性别
    if($tempGenger->{'value'} === "Male")
      $resultStr .= "性别：男\n";
    else if($tempGenger->{'value'} === "Female")
      $resultStr .= "性别：女\n";
    // 返回种族
    if($tempRace->{'value'} === "Asian")
      $resultStr .= "种族：黄种人\n";
    else if($tempRace->{'value'} === "Male")
      $resultStr .= "种族：白种人\n";
    else if($tempRace->{'value'} === "Black")
      $resultStr .= "种族：黑种人\n";
    // 返回眼镜
    if($tempGlass->{'value'} === "None")
      $resultStr .= "眼镜：木有眼镜\n";
    else if($tempGlass->{'value'} === "Dark")
      $resultStr .= "眼镜：目测墨镜\n";
    else if($tempGlass->{'value'} === "Normal")
      $resultStr .= "眼镜：普通眼镜\n";
    //返回微笑
    $resultStr .= "微笑：".round($tempSmiling->{'value'})."%\n";
  }
  if(count($faceArray) === 2){
    // 获取face_id
    $tempFace = $faceArray[0];
    $tempId1 = $tempFace->{'face_id'};
    $tempFace = $faceArray[1];
    $tempId2 = $tempFace->{'face_id'}; 

    // face++ 链接
    $jsonStr =
      file_get_contents("https://apicn.faceplusplus.com/v2/recognition/compare?api_secret=ViX19uvxkT_A0a6d55Hb0Q0QGMTqZ95f&api_key=5eb2c984ad24ffc08c352bdb53ee52f8&face_id2=".$tempId2 ."&face_id1=".$tempId1);
    $replyDic = json_decode($jsonStr);
    //取出相似程度
    $tempResult = $replyDic->{'similarity'};
    $resultStr .= "相似程度：".round($tempResult)."%\n";
    //具体分析相似处
    $tempSimilarity = $replyDic->{'component_similarity'};
    $tempEye = $tempSimilarity->{'eye'};
    $tempEyebrow = $tempSimilarity->{'eyebrow'};
    $tempMouth = $tempSimilarity->{'mouth'};
    $tempNose = $tempSimilarity->{'nose'};
    $resultStr .= "相似分析：\n";
    $resultStr .= "眼睛：".round($tempEye)."%\n";
    $resultStr .= "眉毛：".round($tempEyebrow)."%\n";
    $resultStr .= "嘴巴：".round($tempMouth)."%\n";
    $resultStr .= "鼻子：".round($tempNose)."%\n";
  } 

  //如果没有检测到人脸
  if($resultStr === "")
    $resultStr = "照片中木有人脸=.=";
  return $resultStr;
};
// 写入本地日志文件的函数
function logdebug($text)
{
  file_put_contents('log.txt', $text."\n", FILE_APPEND);
};

希望本文所述对大家基于php的微信公众平台开发有所帮助。