PHP学习：PHP实现微信JS-SDK接口选择相册及拍照并上传的方法

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
wx.config({
  debug: false,
  appId: 'wxed7996e9ad58345d',
  timestamp: 1449717454,
  nonceStr: 'asdfasdfasdf',
  signature: 'b74fb4ab4790172d2ab7e58f0051a1523aaa4803',
  jsApiList: [
    'chooseImage',
    'uploadImage'
  ]
});

// 获取access_token 两小时有效
private function get_access_token(){
    $appid = C('oauth_config.appid');
    $appsecret = C('oauth_config.appsecret');
    $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$appsecret;
    $rurl = file_get_contents($url);
    $rurl = json_decode($rurl,true);
    if(array_key_exists('errcode',$rurl)){
      return false;
    }else{
      $access_token = $rurl['access_token'];
      return $access_token;
    }
}

// 获取jsticket 两小时有效
private function getjsticket(){ // 只允许本类调用,继承的都不可以调用,公开调用就更不可以了
    $access_token = $this->get_access_token();
    $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$access_token."&type=jsapi"; // 两小时有效
    $rurl = file_get_contents($url);
    $rurl = json_decode($rurl,true);
    if($rurl['errcode'] != 0){
      return false;
    }else{
      $jsticket = $rurl['ticket'];
      return $jsticket;
    }
}

// 获取 signature
private function getsignature(){
    $noncestr = '';
    $jsapi_ticket = $this->getjsticket();
    $timestamp = time();
    $url = 'http://zhudianbao.diandodo.com/index.php?g=Opener&m=Merchant&a=open';
    $string1 = 'jsapi_ticket='.$jsapi_ticket.'&noncestr='.$noncestr.'&timestamp='.$timestamp.'&url='.$url;
    $signature = sha1($string1);
    return $signature;
}

function chooseImage(obj){
  // 选择张片
  wx.chooseImage({
    count: 1, // 默认9
    sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图,默认二者都有
    sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有
    success: function(res) {
      var localIds = res.localIds; // 返回选定照片的本地ID列表,localId可以作为img标签的src属性显示图片
      $(obj).attr('src', localIds);
      // 上传照片
      wx.uploadImage({
        localId: '' + localIds,
        isShowProgressTips: 1,
        success: function(res) {
          serverId = res.serverId;
          $(obj).next().val(serverId); // 把上传成功后获取的值附上
        }
      });
    }
  });
}

// 获取图片地址
private function getmedia($access_token,$media_id,$foldername){
    $url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=".$access_token."&media_id=".$media_id;
    if (!file_exists("./Uploads/User_cert/".$foldername)) {
      mkdir("./Uploads/User_cert/".$foldername, 0777, true);
    }
    $targetName = './Uploads/User_cert/'.$foldername.'/'.date('YmdHis').rand(1000,9999).'.jpg';
    $ch = curl_init($url); // 初始化
    $fp = fopen($targetName, 'wb'); // 打开写入
    curl_setopt($ch, CURLOPT_FILE, $fp); // 设置输出文件的位置,值是一个资源类型
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_exec($ch);
    curl_close($ch);
    fclose($fp);
    return $targetName;
}

$targetName = './Uploads/User_cert/'.$foldername.'/'.date('YmdHis').rand(1000,9999).'.jpg';

<?php
class JSSDK {
 private $appId;
 private $appSecret;
 public function __construct($appId, $appSecret) {
  $this->appId = $appId;
  $this->appSecret = $appSecret;
 }
 public function getSignPackage() {
  $jsapiTicket = $this->getJsApiTicket();
  // 注意 URL 一定要动态获取,不能 hardcode.
  $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
  $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
  $timestamp = time();
  $nonceStr = $this->createNonceStr();
  // 这里参数的顺序要按照 key 值 ASCII 码升序排序
  $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
  $signature = sha1($string);
  $signPackage = array(
   "appId"   => $this->appId,
   "nonceStr" => $nonceStr,
   "timestamp" => $timestamp,
   "url"    => $url,
   "signature" => $signature,
   "rawString" => $string
  );
  return $signPackage; 
 }
 private function createNonceStr($length = 16) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  $str = "";
  for ($i = 0; $i < $length; $i++) {
   $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  }
  return $str;
 }
 private function getJsApiTicket() {
  // jsapi_ticket 应该全局存储与更新,以下代码以写入到文件中做示例
  $data = json_decode(file_get_contents("jsapi_ticket.json"));
  if ($data->expire_time < time()) {
   $accessToken = $this->getAccessToken();
   // 如果是企业号用以下 URL 获取 ticket
   // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
   $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
   $res = json_decode($this->httpGet($url));
   $ticket = $res->ticket;
   if ($ticket) {
    $data->expire_time = time() + 7000;
    $data->jsapi_ticket = $ticket;
    $fp = fopen("jsapi_ticket.json", "w");
    fwrite($fp, json_encode($data));
    fclose($fp);
   }
  } else {
   $ticket = $data->jsapi_ticket;
  }
  return $ticket;
 }
 private function getAccessToken() {
  // access_token 应该全局存储与更新,以下代码以写入到文件中做示例
  $data = json_decode(file_get_contents("access_token.json"));
  if ($data->expire_time < time()) {
   // 如果是企业号用以下URL获取access_token
   // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
   $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
   $res = json_decode($this->httpGet($url));
   $access_token = $res->access_token;
   if ($access_token) {
    $data->expire_time = time() + 7000;
    $data->access_token = $access_token;
    $fp = fopen("access_token.json", "w");
    fwrite($fp, json_encode($data));
    fclose($fp);
   }
  } else {
   $access_token = $data->access_token;
  }
  return $access_token;
 }
 private function httpGet($url) {
  $curl = curl_init();
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($curl, CURLOPT_TIMEOUT, 500);
  // 为保证第三方服务器与微信服务器之间数据传输的安全性,所有微信接口采用https方式调用,必须使用下面2行代码打开ssl安全校验.
  // 如果在部署过程中代码在此处验证失败,请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件.
  curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
  curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
  curl_setopt($curl, CURLOPT_URL, $url);
  $res = curl_exec($curl);
  curl_close($curl);
  return $res;
 }
}