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ajax数据请求5(php格式)

ajax数据请求5(php格式):

<!DOCTYPE html><html>	<head>		<meta charset="UTF-8">		<title>ajax请求数据3</title>	</head>	<body>		<button id="btn">请求数据</button>		<h1 id="txt"></h1>		<script type="text/javascript">			var btn = document.getElementById(‘btn‘);			var txt = document.getElementById(‘txt‘);			btn.onclick = function() {				//1.创建XMLHttpRequest对象				var xhr = null;				if(window.XMLHttpRequest) {//非IE56					xhr = new XMLHttpRequest();//实例对象				}else {//IE56					xhr = new ActiveXObject(‘Microsoft.XMLHTTP‘);				}				//2.打开与服务器的链接				xhr.open(‘get‘,‘test3.php?_=‘ + new Date().getDate(),true);//生成不一样的url解决缓存问题				//3.发送给服务器				xhr.send(null);//get请求				//4.响应就绪				xhr.onreadystatechange = function() {					if (xhr.readyState == 4) {//请求完成						if(xhr.status == 200) {							var json = JSON.parse(xhr.responseText);							txt.innerHTML = json.sex;						}else {							alert(xhr.status);						}					}				}			}		</script>	</body></html>

 PHP格式:

<?php	$str = ‘{"name":"老王","sex":"男","age":"22","score":"58"}‘;	echo $str;	?>

  

ajax数据请求5(php格式)