PHP制作微信自定义分享
最近在做项目的时候遇到一个项目，要求再通过微信分享文章时，需要按照他自己的要求显示分享标题、分享摘要以及分享图片，在网上找了好多种办法，最后采用了微信公众平台自带的分享接口功能。
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
微信分享接口制作
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