微信公众号自定义菜单post请求错误解决办法

最近做微信公众号开发，遇到一个扯淡的事情，自定义菜单出不来，然而在网页调试工具里面执行就成功了，这个事情就非常尴尬，附上代码给你们感受一下：

public function addMenu()    {        $url = " https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" . getToken();        $menu['button'] = [            [                "name" => "随便玩",                "sub_button" => [                    [   "type" => "click",                        "name" => "听歌",                        "key" => "Listen"   ],                    [   "type" => "view",                        "name" => "百度",                        "url" => "http://www.baidu.com"                    ]                ]            ],            [                "name" => "日常生活",                "sub_button" => [                    [   "type" => "view",                        "name" => "天气",                        "url" => "http://www.weather.com.cn/"                    ],                    [   "type" => "click",                        "name" => "城市天气",                        "key" => "city_weather"                    ],                    [   "type" => "click",                        "name" => "星座运势",                        "key" => "constellation"                    ]                ]            ],            [                "name" => "图片",                "sub_button" => [                    [   "type" => "scancode_push",                        "name" => "自动扫",                         "key" => "auto_scanf",                     ],                    [   "type" => "scancode_waitmsg",                        "name" => "扫一扫",                         "key" => "scanf",                     ],                    [   "type" => "pic_photo_or_album",                        "name" => "传图片",                        "key" => "photo"                    ],                    [   "type" => "location_select",                        "name" => "发送位置",                        "key" => "position"                    ]                ]            ]        ];        $str = json_encode($menu,JSON_UNESCAPED_UNICODE);        file_put_contents('menu.txt',$str);        var_dump(MyCurl::post($url,$str));    }

因为输出结果一直是null，所以不停的找post的问题，代码如下：

public static function post($url,$data)    {        //创建curl资源        $ch = curl_init() ;        //设置参数        curl_setopt($ch,CURLOPT_URL,$url);//设置请求地址        curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);//设置是否返回数据        curl_setopt($ch,CURLOPT_HEADER,false);//是否显示请求头        curl_setopt($ch,CURLOPT_TIMEOUT,10);//设置超时时间，秒        curl_setopt($ch,CURLOPT_POST,true);//设置post请求        curl_setopt($ch,CURLOPT_POSTFIELDS,$data);//设置post请求参数        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);//是否启用ssl验证        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);//是否验证主机        //发起请求        $content = curl_exec($ch);        //关闭        curl_close($ch);        return $content;    }

对比网上的代码，实在找不出哪里有错，直到百度到一篇文章才找到问题，原来是在第一段代码的$url里面，刚开始有一个空格、一个空格、空格、、、我嘞个去，坑死人有木有。以后注意一下吧，尽量少有空格(╥╯^╰╥)