百度搜索效果（页面传来数据地址，由服务器去获取）：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>页面传来数据地址，由服务器去获取</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
list-style: none;
}
#box {
500px;
margin: 50px auto 0;
}
#ipt {
480px;
height: 30px;
padding: 0 8px;
line-height: 30px;
font-size: 18px;
}
#list {
padding: 0 10px;
background: #e3e3e3;
}
#list li {
line-height: 26px;
font-size: 16px;
color: blue;
}
#list li:hover {
background: #ccc;
}
</style>
</head>
<body>
<div id="box">
<input type="text" name="ipt" id="ipt" value="" />
<ul id="list">
<!--<li>12306</li>
<li>hao123</li>-->
</ul>
</div>
<script src="ajax.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var ipt = document.getElementById('ipt');
var list = document.getElementById('list');
ipt.onkeyup = function() {
list.innerHTML = '';
ajax('baidu2.php?wd='+ipt.value+'&sc=http://suggestion.baidu.com/su?wd=&_='+new Date().getTime(),function(str) {
var json = JSON.parse(str);
for(var i = 0; i < json.s.length; i ++) {
list.innerHTML += '<li>'+json.s[i]+'</li>';
}
});
}
</script>
</body>
</html>
PHP代码：
<?php
header("Access-Control-Allow-Origin:*");
// $url='http://suggestion.baidu.com/su?wd=';//由服务器来获取数据
$url=$_GET['sc'];//页面传过来数据地址，由服务器去获取
function getJSONStr($str){
return substr($str,17);
}
function crul($key){
global $url;
$data = file_get_contents($url.$key);
$data = getJSONStr($data);
$data = str_replace("{q:"","",$data);
$data = str_replace("",p:","{%aaa%}",$data);
$data = str_replace(",s:[","{%aaa%}",$data);
$data = str_replace("]});","",$data);
$arr = explode("{%aaa%}",$data);
$res = array();
$res['q'] = iconv("GB2312","UTF-8",$arr[0]);
if ($arr[1] == 'true'){
$arr[1] = true;
}else{
$arr[1] = false;
}
$res['p'] = $arr[1];
if (strlen($arr[2])>0){
$arr[2] = substr($arr[2],1,-1);
$arr[2] = str_replace("","",",",$arr[2]);
$arr[2] = iconv("GB2312","UTF-8",$arr[2]);
}
$res['s'] = explode(',',$arr[2]);
echo json_encode($res);//json_encode()转换成json字符串
}
$key = $_REQUEST['wd'];
crul($key);
?>