方式一
$ch = curl_init('https://www.251code.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HTTP_CODE); // 200
curl_close($ch);方式二
print_r(
get_headers('https://www.251code.com')
);返回以下内容：
Array ( [0] => HTTP/1.1 200 OK [1] => Date: Sun, 04 May 2014 03:43:04 GMT [2] => Content-Type: text/html; charset=utf-8 [3] => Connection: Close [4] => Vary: Accept-Encoding [5] => Set-COOKIE: BAIDUID=4977AF4FB1E9A5D13C79939E28D92161:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com [6] => Set-COOKIE: BDSVRTM=0; path=/ [7] => Set-COOKIE: H_PS_PSSID=4681_1465_5224_6023_4759_6018_6257_6313_6328_6269; path=/; domain=.baidu.com [8] => P3P: CP=" OTI DSP COR IVA OUR IND COM " [9] => Cache-Control: private [10] => Expires: Sun, 04 May 2014 03:42:09 GMT [11] => X-Powered-By: HPHP [12] => Server: BWS/1.1 [13] => BDPAGETYPE: 1 [14] => BDQID: 0x9acb602d00001922 [15] => BDUSERID: 0 )