<?php
$object = new stdClass();
$object->hello = 'Hello world';
/*
object(stdClass)#1 (1) {
["hello"]=>
string(11) "Hello world"
}
*/
Standard input is empty
object(stdClass)#1 (1) {
  ["hello"]=>
  string(11) "Hello world"
}
string(50) "O:8:"stdClass":1:{s:5:"hello";s:11:"Hello world";}"