<html>
<head>
<title>在线演示_php获取某网站的快照时间</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="keywords" content="百度,baidu,查询快照结果">
<meta name="description" content="php查询网站快照日期: ">
</head>
<body>
<?php $k=isset($_POST['k'])?$_POST['k']:''; ?>
<form method="post" action="">
  <h2>查询网站快照日期:</h2>
  输入网址：<br />
  http://<input type="text" name="k" size="60" value="<?php echo $k ?>">
  <input type="submit" value="提交">
</form>
<?php
/*
  php获取某网站的快照时间 by enenba
  2012-6-18
  @param str $url 一级域名
  @param str 时间格式
 */
function getKuaiZhao($text) {
  $url = 'http://www.baidu.com/s?word='.$text;
  $html = file_get_contents($url);
  $text = str_replace('.','\.',addslashes($text));
  $search = '/<b>'.$text.'<\/b>[^<]*((?:19|20)[0-9]{2}-(?:1[012]|[1-9])-(?:[12][0-9]|3[01]|[1-9]))/';
  preg_match($search, $html, $r);
  //highlight_string($search);
  return $r[1];
}
if($k=='') {
  echo('请输入url');
}else{
  if($r = getKuaiZhao($k)) {
    echo '快照：'.$r; 
  }else {
    echo('无快照');
  }
}
?>
</body>
</html>