Cannot post data to MySql database from my ionic app - php

Question

I am not able to post data to MySql database. I am running the project on chrome browser(windows7). Here I can see the params but they are not sent to the database table. What actually is the problem with my code?
My php code is:
<?php
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
$postdata = file_get_contents("php://input");
$email = $postdata->email;
$password = $postdata->password;
$username = $postdata->username;
$con = mysqli_connect("localhost","root",'') or die ("Could not connect: " . mysql_error());;
mysqli_select_db($con, 'db_lastLog');
$qry_em = 'select count(*) as cnt from users where email ="' . $email . '"';
$qry_res = mysqli_query($con, $qry_em);
$res = mysqli_fetch_assoc($qry_res);
if($res['cnt']==0){
$qry = 'INSERT INTO users (name,pass,email) values ("' . $username . '","' . $password . '","' . $email . '")';
$qry_res = mysqli_query($con, $qry);
if ($qry_res) {
echo "1";
} else {
echo "2";;
}
}
else
{
echo "0";
}
?>
My controller code is:
.controller('SignupCtrl', function($scope, $http) {
$scope.signup = function (userdata) {
var request = $http({
method: "POST",
url: "http://localhost/lastLog.php",
crossDomain : true,
data: {
username : userdata.username,
password : userdata.password,
email : userdata.email
},
headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
});
/* Successful HTTP post request or not */
request.success(function(data) {
if(data == "1"){
$scope.responseMessage = "Successfully Created Account";
}
if(data == "2"){
$scope.responseMessage = "Cannot Create Account";
}
else if(data == "0") {
$scope.responseMessage = "Email Already Exist"
}
});
}
})
My html code is:
<ion-pane>
<ion-header-bar class="bar-positive">
<h2 class="title">SignUp</h2>
</ion-header-bar>
<ion-view view-title="SignUp" name="signup-view">
<ion-content class="has-header" ng-controller="SignupCtrl">
<div class="list list-inset">
<label class="item item-input">
<input class="form-control" type="text" ng-model="userdata.username" placeholder="Enter Username">
</label>
<label class="item item-input">
<input type="text" ng-model="userdata.email" placeholder="Enter Your Email">
</label>
<label class="item item-input">
<input class="form-control" type="password" ng-model="userdata.password" placeholder="Enter Your Password">
</label>
<button class="button button-block button-positive" ng-click="signup(userdata)">SignUp</button><br>
<span>{{responseMessage}}</span>
</div>
</ion-content>
</ion-view>
</ion-pane>