谷歌搜索自动补全

<?php
    header("Content-type: text/json; charset=utf-8");
    if(isset($_POST['w'])){
        $word=$_POST['w'];
    }else if(isset($_GET['w'])){
        $word=$_GET['w'];
    }else{
        $word="空内容";
    }
    $url="http://209.85.228.22/complete/search?client=hp&hl=zh-CN&sugexp=msedr&gs_rn=64&gs_ri=hp&cp=3&gs_id=3wx&q={$word}&xhr=t";
    $text=file_get_contents($url);
    $text=iconv('GB2312', 'UTF-8', $text);
    $arr=json_decode($text,true);
    $i=0;
    foreach( $arr[1] as $key => $value )
    {
        foreach( $value as $k => $v )
        {
            if($v!="0"){
                $list[$i]=$v;
                $i++;    
            }
        }
    }
    $data['word']=$arr['0'];
    $data['list']=$list;
    echo json_encode($data,true);
?>