<?php

class wxShare{

    //获取wx.config需要的参数
    public function getWxConfig($config,$link){
        $access_token = $this->get_token($config['appid'],$config['appsecret'],$config['debug'],$config['noCacheToken']);
        $jsapiTicket = $this->get_ticket($access_token);
        $nonceStr = $this->nonceStr(16);
        $timestamp = time();
       
        $string = 'jsapi_ticket='.$jsapiTicket.'&noncestr='.$nonceStr.'&timestamp='.$timestamp.'&url='.$link;
        $signature = sha1 ($string);
        $WxConfig["appid"] = $config['appid'];
        $WxConfig["noncestr"] = $nonceStr;
        $WxConfig["timestamp"] = $timestamp;
        $WxConfig["signature"] = $signature;
        $WxConfig["debug"] = $config['debug'];
        $WxConfig["link"] = $link;
        return $WxConfig;
    }
   
    //生成签名的随机串
    public function nonceStr($length){
        $str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJK1NGJBQRSTUVWXYZ';//随即串，62个字符
        $strlen = 62;
        while($length > $strlen){
            $str .= $str;
            $strlen += 62;
        }
        $str = str_shuffle($str);
        return substr($str,0,$length);
    }
   
    //获取access_token
    public function get_token($appid,$appsecret,$debug=0,$noCacheToken=1){
        if($_COOKIE['formplus_share_token'] == null || $debug == 1 || $noCacheToken == 1){
            $result = $this->http_get('https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$appsecret);
            $result = json_decode($result,true);
            $access_token = $result['access_token'];
            setcookie('formplus_share_token',$access_token,time()+7199);
        }else{
             $access_token = $_COOKIE['formplus_share_token'];
        }
        return $access_token;
    }
   
   
    //获取ticket
    public function get_ticket($access_token){
        $url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token='.$access_token;
        $res = json_decode($this->http_get($url));
        $ticket = $res->ticket;
        return $ticket;
    }
   
    //请求方法
    public function http_get($url){
        $oCurl = curl_init();
        if(stripos($url,"https://")!==FALSE){
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, FALSE);
            curl_setopt($oCurl, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1
        }
        curl_setopt($oCurl, CURLOPT_URL, $url);
        curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
        $sContent = curl_exec($oCurl);
        $aStatus = curl_getinfo($oCurl);
        curl_close($oCurl);
        if(intval($aStatus["http_code"])==200){
            return $sContent;
        }else{
            return false;
        }
    }
}



?>

引用

include_once('wxShare.class.php');
$wxShare = new wxShare();

//appid
//appsecret
//debug 开启调试模式 1或0
//noCacheToken 不缓存token，每次都重新获取 1或0
//$link 分享链接

$wxConfig = ['appid'=>'appid','appsecret'=>'appsecret','debug'=>'debug','noCacheToken'=>'noCacheToken'];

$shareConfig = $wxShare->getWxConfig($wxConfig,$link);