<?php
	$arr = array('id'=>1,'name'=>'YM','sex'=>'女','age'=>0);
	//php转成了json字符串
	echo json_encode($arr);
	echo '<hr>';
	$str = '{"id":1,"name":"YM","sex":"\u5973","age":0}';
	$obj =json_decode($str,true);
	var_dump($obj);