虽然在从GOOGLE查询中获取结果总数时尝试开发自己的关键字难度工具时遇到了问题.为了使它尽可能清晰,这里是我想要获取的数字的屏幕：

我在Google自定义搜索API上找不到任何关于如何执行此操作的参考资料,所以我已经构建了一个小型的刮刀,但我觉得这不是最好的方法.这是我的代码：

<?PHP
$url = "http://www.google.COM/seArch?q=".$keyword;
$text = file_get_contents($url);
//get string between 2 strings function
function get_string_between($string,$start,$end){
    $string = " ".$string;
    $ini = strpos($string,$start);
    if ($ini == 0) return "";
    $ini += strlen($start);
    $len = strpos($string,$end,$ini) - $ini;
    return substr($string,$ini,$len);
}
//fetch the string between "About" and "results"
$res = get_string_between($text,"About","results");
//keep only numeric characters
$res = PReg_replace('/[^0-9]+/','',$res);
?>

你能建议一个更好的方法吗？ (最好使用Google Api)

$params = array('q' => 'shark wITh lasers that shoot monkeys with balloons on skyscraPErs please give me less results asdafasdDFg');
$content = file_get_contents('http://www.google.com/search?' . http_build_query($params));
preg_match('/About (.*) results/i',$content,$matches);
echo !empty($matches[1]) ? $matches[1] : 0;
// output: 14,300