function getShareSignaTure($url){
$appID='**************';
$appSecret='*********************************';
$jssdk = new JSSDK($appID, $appSecret);
//确保你获取用来签名的url是动态获取的,动态页面可参见实例代码中php的实现方式。
//如果是html的静态页面在前端通过ajax将url传到后台签名,前端需要用js获取当前页面除去'#'hash部分的链接
//(可用location.href.split('#')[0]获取,而且需要encodeURIComponent),
//因为页面一旦分享,微信客户端会在你的链接末尾加入其它参数,如果不是动态获取当前链接,将导致分享后的页面签名失败。
//后台接收到url 需要进行解析
$signPackage = $jssdk->GetSignPackage(urldecode($url));
if(!isset($signPackage)){
return $this->apiNullJson(101);
}
$data=[
'timesTamp'=>$signPackage["timestamp"],
'nonceStr'=>$signPackage["nonceStr"],
'signaTure'=>$signPackage["signature"]
];
return $this->apiDataJson(0,$data);
}
创建JSSDK.php类
<?php
namespace app\common;
class JSSDK
{
private $appId;
private $appSecret;
public function __construct($appId, $appSecret)
{
$this->appId = $appId;
$this->appSecret = $appSecret;
}
public function getSignPackage($url)
{
$jsapiTicket = $this->getJsApiTicket();
//$url = "http://$_SERVER[HTTP_HOST]$_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);
$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
$data = json_decode(file_get_contents("jsapi_ticket.json",true),true);
if (!isset($data)||$data['expires']<time()||!isset($data['jsapi_ticket'])) {
$accessToken = $this->getAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
$res = json_decode($this->httpGet($url));
$ticket = $res->ticket;
if ($ticket) {
$data = array();
$data['expires'] = 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
$data = json_decode(file_get_contents("access_token.json",true),true);
if (!isset($data)||$data['expires'] < time()||!isset($data['access_token'])){
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
$res = json_decode($this->httpGet($url));
$access_token = $res->access_token;
if ($access_token) {
$data = array();
$data['access_token']= time() + 7000;
$data['expires']= $access_token;
$fp = fopen("access_token.json", "w");
fwrite($fp, json_encode($data));
fclose($fp);
return $data['access_token'];
}
} else {
$access_token = $data['access_token'];
}
return $access_token;
}
private function httpGet($url)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_URL, $url);
$res = curl_exec($curl);
curl_close($curl);
// dump($res);
return $res;
}
}
分享接口的官方新文档链接: https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421141115