验证token、回复图文文本、推送消息的实用微信类php代码

<?php
class wechat{
  private $data = array();
  public function __construct($token){
    $this -> auth($token, $wxuser) || exit;
    if(is_get){
      echo($_get['echostr']);
      exit;
    }else{
      $xml = file_get_contents("php://input");
  
      $xml = new simplexmlelement($xml);
  //file_put_contents('/var/log/test.txt', $xml,file_append);
      $xml || exit;
      foreach ($xml as $key => $value){
        $this -> data[$key] = strval($value);
      }
    }
  }
  public function request(){
    return $this -> data;
  }
  public function response($content, $type = 'text', $flag = 0){
    $this -> data = array('tousername' => $this -> data['fromusername'], 'fromusername' => $this -> data['tousername'], 'createtime' => now_time, 'msgtype' => $type);
    $this -> $type($content);
    $this -> data['funcflag'] = $flag;
    $xml = new simplexmlelement('<xml></xml>');
    $this -> data2xml($xml, $this -> data);
    exit($xml -> asxml());
  }
  private function text($content){
    $this -> data['content'] = $content;
  }
  private function music($music){
    list($music['title'], $music['description'], $music['musicurl'], $music['hqmusicurl']) = $music;
    $this -> data['music'] = $music;
  }
  private function news($news){
    $articles = array();
    foreach ($news as $key => $value){
      list($articles[$key]['title'], $articles[$key]['description'], $articles[$key]['picurl'], $articles[$key]['url']) = $value;
      if($key >= 9){
        break;
      }
    }
    $this -> data['articlecount'] = count($articles);
    $this -> data['articles'] = $articles;
  }
  private function transfer_customer_service($content){
    $this -> data['content'] = '';
  }
  private function data2xml($xml, $data, $item = 'item'){
    foreach ($data as $key => $value){
      is_numeric($key) && $key = $item;
      if(is_array($value) || is_object($value)){
        $child = $xml -> addchild($key);
        $this -> data2xml($child, $value, $item);
      }else{
        if(is_numeric($value)){
          $child = $xml -> addchild($key, $value);
        }else{
          $child = $xml -> addchild($key);
          $node = dom_import_simplexml($child);
          $node -> appendchild($node -> ownerdocument -> createcdatasection($value));
        }
      }
    }
  }
  private function auth($token){
    $signature = $_get["signature"];
    $timestamp = $_get["timestamp"];
    $nonce = $_get["nonce"];
    $tmparr = array($token, $timestamp, $nonce);
    sort($tmparr, sort_string);
    $tmpstr = implode($tmparr);
    $tmpstr = sha1($tmpstr);
    if(trim($tmpstr) == trim($signature)){
      return true;
    }else{
      return false;
    }
    return true;
  }
}
?>