PHP制作微信自定义分享

要制作微信接口分享功能，前期需要注册一个公众号，并认证通过，只有这样才能实现接口制作。在这里微信注册再不做详细的说明，大家可以直接在微信公众平台官网自己查找：mp.weixin.qq.com

下面我一步步给大家做介绍

1、公众号开发信息配置

在开发分享接口之前需要先配置公众平台配置信息，如下图所示：点击“开发-基本信息”，可以看到公众号开发信息，在开发者秘钥哪里点击“开启”，配置自己的秘钥信息，配置成功后，保存开发者ID(AppID)和开发者密码(AppSecret)

2、配置JS接口安全域名

点击“设置与开发--公众号设置”，点击JS接口安全域名后面的设置，按照要求添加js安全域名，如图所示

3、PHP分享接口类

这里不多说，直接上代码

class wechatClass
{
    public $AppID;
    public $AppSecret;
    public $redirect_uri;
    public $DbSy;
    public $dump_url;
    public $scope;
    public function __construct()
    {
 parent::__construct();
 $this->AppID = "开发者密码(AppSecret)";
 $this->AppSecret = "开发者密码(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={$nonceStr}×tamp={$timestamp}&url={$url}";
 $signature = sha1($string);
 // var_dump($signature);die;
 $signPackage = array(
     "appId"     => $this->AppID,
     "nonceStr"  => $nonceStr,
     "timestamp" => $timestamp,
     "url"=> $url,
     "signature" => $signature,
     "rawString" => $string
 );
 return $signPackage;
    }
    public function createNonceStr($length = 16) {
 $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 $str = "";
 for ($i = 0; $i < $length; $i++) {
     $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
 }
 return $str;
    }
    public 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
 //echo $_SERVER['document_ROOT'];
 $data = json_decode(file_get_contents($_SERVER['document_ROOT']."/static/yejuzhi/js/access_token.json"));
 // var_dump($data->expire_time);die;
 if ($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;
  $fp = fopen($_SERVER['document_ROOT']."/static/yejuzhi/js/access_token.json", "w");
  fwrite($fp, json_encode($data));
  fclose($fp);
     }
 } else {
     $ticket = $data->jsapi_ticket;
 }
 return $ticket;
    }
    public 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
 $data = json_decode(file_get_contents($_SERVER['document_ROOT']."/static/yejuzhi/js/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;
  $fp = fopen($_SERVER['document_ROOT']."/static/yejuzhi/js/access_token.json", "w");
  fwrite($fp, json_encode($data));
  fclose($fp);
     }
 } else {
     $access_token = $data->access_token;
 }
 return $access_token;
    }
    public function httpGet($url){
 $curl = curl_init();
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($curl, CURLOPT_TIMEOUT, 500);
 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
 curl_setopt($curl, CURLOPT_URL, $url);
 $res = curl_exec($curl);
 curl_close($curl);
 return $res;
    }
}

4、PHP文件配置

这里我是以TP5.1框架写的，大家可以自行设置

$wx = new WeChatClass();
$sign = $wx->getSignPackage();
$this->assign('sign',$sign);

5、前端HTML代码

前端HTML代码请参考开发文档：https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#111

这里我以自定义“分享给朋友”及“分享到QQ”按钮的分享内容（1.4.0）接口为例

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