PHP生成网页快照 不用COM不用扩展

$url = 'www.bkjia.com; //抓取烈火
echo snapshot($url); //输出结果为图片地址
echo snapshot($url, './baidu.png'); //将图片保存至本地baidu.png, 输出内容图片大小
/**
* 生成网页快照
*
* @param string $site 目标地址
* @param string $path 保存地址, 为空则不保存
* @param integer $dealy 延迟
* @return mixed 根据参数返回
*/
function snapshot($site, $path = '', $dealy = 0)
{
$url = 'http://ppt.cc/yo2/catch.php';
$query = 'url=' . $site . '&delay=' . $dealy . '&rnd=' . mt_rand(1, 9);
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
curl_close($ch);
if (strlen($data) != 32) {
exit('无效网址');
}
$file = $data{0} . '/' . $data{1} . '/' . $data{2} . '/';
$file = 'http://cache.ppt.cc/' . $file . 'src_' . $data . '.png';
if (!empty($path)) {
$data = file_get_contents($file);
return file_put_contents($path, $data);
}
return $file;
}