微信开发配置JSSDK，注入权限验证，以及invalid signature签名错误解决

<script src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

$(function(){  
    //var url = window.location.href; 
    var url=encodeURIComponent(location.href.split(‘#‘)[0]); 
    //alert(url);
    //ajax注入权限验证  
    $.ajax({  
        url:"ajax",  
        //dataType: ‘json‘,  
        type:‘POST‘,
        data: {url:url},   
        error: function(XMLHttpRequest, textStatus, errorThrown){  
            alert("发生错误："+errorThrown);  
        },  
        success: function(res){
            var appId = res.appid;  
            var noncestr = res.noncestr;  
            var jsapi_ticket = res.jsapi_ticket;  
            var timestamp = res.timestamp;  
            var signature = res.signature;  
            wx.config({  
                debug: true, //开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。  
                appId: appId, //必填，公众号的唯一标识  
                timestamp: timestamp, // 必填，生成签名的时间戳  
                nonceStr: noncestr, //必填，生成签名的随机串  
                signature: signature,// 必填，签名，见附录1  
                jsApiList: [‘onMenuShareTimeline‘,‘onMenuShareAppMessage‘,‘onMenuShareQQ‘,  
                            ‘onMenuShareWeibo‘,‘onMenuShareQZone‘,‘chooseImage‘,  
                            ‘uploadImage‘,‘downloadImage‘,‘startRecord‘,‘stopRecord‘,  
                            ‘onVoiceRecordEnd‘,‘playVoice‘,‘pauseVoice‘,‘stopVoice‘,  
                            ‘translateVoice‘,‘openLocation‘,‘getLocation‘,‘hideOptionMenu‘,  
                            ‘showOptionMenu‘,‘closeWindow‘,‘hideMenuItems‘,‘showMenuItems‘,  
                            ‘showAllNonBaseMenuItem‘,‘hideAllNonBaseMenuItem‘,‘scanQRCode‘] //必填，需要使用的JS接口列表，所有JS接口列表 见附录2  
            });  
        }  
    });  
  
}); 

var url=encodeURIComponent(location.href.split(‘#‘)[0]); 

$url=urldecode($_POST[‘url‘]);  //这里转回后成为签名的参数
$string="jsapi_ticket={$ticket}&noncestr{$noncestr}&timestamp={$timestamp}&url={$url}";
$signature=sha1($string);