html - Ionic + Angular + PHP Undefined property: stdClass::$variable in insert.php -

there 3 files. when submit button clicked in ionic page, send inputs controller, , controller parse insert.php. forms input datas saved when use html(without ionic contents), form sends empty data mysql database, when use ionic. errors found firebugs are: 1. response - notice: undefined property: stdclass::$firstname in insert.php 2. post (json) - there no child objects please me, below file.

page 01 -

<ion-content>         <form>             <br><br>              <center>                 <ion-list>                     <!--step 1 billing details-->                             <div ng-repeat="group in groups">                         <ion-item class="item-stable checkout item ng-binding active" ng-click="togglegroup(group)" ng-class="{active: isgroupshown(group)}">                             <i class="icon" ng-class="isgroupshown(group) ? 'ion-minus' : 'ion-plus'"></i>                             &nbsp;                              {{group.name}}                         </ion-item>                         <ion-item class="item-accordion" ng-repeat="item in group.items" ng-show="isgroupshown(group)">                             <input ng-required="true" ng-model="firstname" class="dumbie" type="text" placeholder="{{item.subname}}">                             <span class="error" ng-show="myform.first_name.$error.required">first name required!</span>                              <input ng-required="true" ng-model="lastname" class="dumbie" type="text" placeholder="{{item.sublname}}">                             <div role="alert"> <span class="error" ng-show="myform.last_name.$error.required"> last name required!</span> </div>                             <input ng-required="true" ng-model="email" class="dumbie" type="text" placeholder=" {{item.subemail}}">                             <div role="alert"> <span class="error" ng-show="myform.email.$error.required"> email required!</span>  </div>                 <input type="button" value="submit" ng-click="insertdata()"><br/>            </form>     </ion-content> 

page - 2 - angular controller

 $scope.insertdata=function(){                         var link = 'http://edu.local/fb_store/www/templates/insert.php';                         $http.post(link,{'firstname':$scope.firstname,'lastname':$scope.lastname,'email':$scope.email,'telephone':$scope.telephone})                                 .success(function(data,status,headers,config){                                     console.log("data inserted successfully");                         });                     } 

page 3- insert.php

 <?php  $data = json_decode(file_get_contents("php://input"),true);  var_dump($data);die; $firstname = $data->firstname; $lastname = $data->lastname; $email = $data->email; $telephone = $data->telephone;   mysql_connect("localhost","root","");  mysql_select_db("example_demo");  $singam = "insert `tbl_order`(`firstname`,`lastname`,`email`,`telephone`)  values('".$firstname."','".$lastname."','".$email."','".$telephone."')";   mysql_query($singam); //      var_dump(mysql_fetch_assoc($singam));die;  ?> 

instead of using this,

$data = json_decode(file_get_contents("php://input"),true); var_dump($data);die; $firstname = $data->firstname; 

try use $_post like,

$firstname = $_post['firstname'];