php无法获取angularjs post数据

php $_POST 无法获取angluarjs post参数数据

/**
 * 公共路由
 */
var app_main = angular.module("main",["ngRoute"]);

//配置路由
app_main.config(function($routeProvider,$locationProvider,$httpProvider){
	
	$httpProvider.defaults.transformRequest=function(obj){
	    var str=[];
	    for(var p in obj){
	       str.push(encodeURIComponent(p)+"="+encodeURIComponent(obj[p]));
	    }
	    return str.join("&");
	};
	$httpProvider.defaults.headers.post={
	    'Content-Type':'application/x-www-form-urlencoded'
	};
});

app_main.controller("initController",function($rootScope,$scope,$route,$http,$location,$timeout){
	
});

angularjs config加上以上代码就解决了