谷歌搜索以编程方式在所有结果页面上使用 php

嗨，我正在尝试使用PHP程序进行谷歌搜索。结果即将到来，但我只得到四个结果。怎么办任何建议..这是我的代码

<?php
    $query = 'xyz';
    $url = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&num=10&q=".$query;
    $body = file_get_contents($url);
    $json = json_decode($body);
    print_r($json);
    for($x=0;$x<count($json->responseData->results);$x++){
        echo "<b>Result ".($x+1)."</b>";
        echo "<br>URL: ";
        echo $json->responseData->results[$x]->url;
        echo "<br>VisibleURL: ";
        echo $json->responseData->results[$x]->visibleUrl;
        echo "<br>Title: ";
        echo $json->responseData->results[$x]->title;
        echo "<br>Content: ";
        echo $json->responseData->results[$x]->content;
        echo "<br><br>";
    }
?>

请帮帮我...