一个php抓取url的函数

根据给定的url，抓取url的内容，可以设置抓取超时

function geturl($url)
{
	$ch = curl_init();
	$timeout = 5;
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
	$html = curl_exec($ch);
	curl_close($ch);
	return $html;
}