AngularJs的$http发送POST请求,php无法接收Post的数据问题及解决方案

$.ajax({
 type: 'POST',
 url:'process.php',
 data: formData,
 dataType: 'json',
 success: function(result){
 //do something
 }
 });

$http({
 method : 'POST',
 url: 'process.php',
 data: $.param($scope.formData), //序列化参数
 headers: { 'Content-Type': 'application/x-www-form-urlencoded' } )
})　

$input = file_get_contents("php://input",true);
echo $input;　

// Your app's root module...
angular.module('MyModule', [], function($httpProvider) {
 // Use x-www-form-urlencoded Content-Type
 $httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';
 
 /**
 * The workhorse; converts an object to x-www-form-urlencoded serialization.
 * @param {Object} obj
 * @return {String}
 */
 var param = function(obj) {
 var query = '', name, value, fullSubName, subName, subValue, innerObj, i;
 
 for(name in obj) {
 value = obj[name];
 
 if(value instanceof Array) {
 for(i=0; i<value.length; ++i) {
 subValue = value[i];
 fullSubName = name + '[' + i + ']';
 innerObj = {};
 innerObj[fullSubName] = subValue;
 query += param(innerObj) + '&';
 }
 }
 else if(value instanceof Object) {
 for(subName in value) {
 subValue = value[subName];
 fullSubName = name + '[' + subName + ']';
 innerObj = {};
 innerObj[fullSubName] = subValue;
 query += param(innerObj) + '&';
 }
 }
 else if(value !== undefined && value !== null)
 query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';
 }
 
 return query.length ? query.substr(0, query.length - 1) : query;
 };
 
 // Override $http service's default transformRequest
 $httpProvider.defaults.transformRequest = [function(data) {
 return angular.isObject(data) && String(data) !== '[object File]' ? param(data) : data;
 }];
});

$http({
 method:"POST",
 url:"/api/login.php",
 data:$scope.Account
});