1、“公众号设置”的功能设置里面填写js接口安全域名，ip不可以。（微信开发不熟的可以阅读下微信文档）

2、引入js https://res.wx.qq.com/open/js/jweixin-1.0.0.js

3、调用js 方法（需要各种参数可接口获得，快速版直接php插入）
以下是所需代码

index.php（当前页面引用）

<script type="text/javascript">
    window.shareData = {
        'imgUrl': "**",
        'timeLineLink': "*",//后台添加域名的网址
        'tTitle': '***',
        'tContent': '***',
    };
</script>
<?php include_once('wx_share.php');?>

wx_share.php（封装php获取签名以及其他参数）

<?php
include_once ('wx_js_sdk.php');
$jssdk = new JSSDK(APPID,APPSECRET);
$signPackage = $jssdk->getSignPackage();
?>
<script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script type="text/javascript">
wx.config({
    debug:false,
    appId: '<?php echo $signPackage["appId"];?>',
    timestamp: <?php echo $signPackage["timestamp"];?>,
    nonceStr: '<?php echo $signPackage["nonceStr"];?>',
    signature: '<?php echo $signPackage["signature"];?>',
    jsApiList: ['onMenuShareTimeline','onMenuShareAppMessage','onMenuShareQQ']
});
wx.ready(function(){
     wx.onMenuShareAppMessage({
         title:window.shareData.tTitle,
         link:window.shareData.timeLineLink,
         imgUrl:window.shareData.imgUrl,
         desc:window.shareData.tContent,
         success: function(){shareWxAdd();}
    });
    wx.onMenuShareQQ({
        title:window.shareData.tTitle,
        link:window.shareData.timeLineLink,
        imgUrl:window.shareData.imgUrl,
        desc:window.shareData.tContent,
        success: function(){shareWxAdd();}
    });
    wx.onMenuShareTimeline({
        title:window.shareData.tTitle,
        link:window.shareData.timeLineLink,
        imgUrl:window.shareData.imgUrl,
        success: function(){shareWxAdd();}
    });
});
</script>
 

wx_js_sdk.php（后台处理信息 类）

<?php
if (!defined("APPID")) {
    define("APPID", "wx***bc");//认证过的微信appid
    define("APPSECRET", "98***9");
}
if (!class_exists('M')) {
    include_once('*******/memcache.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()
    {
        $key = "JSAPI_TICKET";
        $mdata = M::Get($key);
        if ($mdata)
        //if(0)
        {
            return $mdata['ticket'];
        } else {
            $accessToken = $this->getAccessToken();
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
            $res = json_decode($this->httpGet($url), true);
            if ($res) {
                M::Set($key, $res, 7000);
                $this->doSpecialMem($res['ticket'], 1, 7000);
                return $res['ticket'];
            }
        }
    }
 
    private function getAccessToken()
    {
        return $this->httpGet('http://*****/get_access_token.php?from=****');
    }
 
    private 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;
    }
 
    private function doSpecialMem($value = "", $type, $expire = 7200)
    {
        $key = "d****f4"; //秘钥
        $url = "http://****spl_mem.php";
 
        $data = array(
            "value" => $value,
            "type" => $type,
            "code" => md5($value . ',' . $key),
            "expire" => $expire
        );
 
        return $this->httpGet($url . '?' . http_build_query($data));
    }
}