使用curl在PHP中获取HTTP代码

Question

我正在使用CURL来获取站点的状态,如果它是向上/向下或重定向到另一个站点.我希望尽可能简化它,但效果不佳.

<?php
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

return $httpcode;
?>

我把它包裹在一个函数中.它工作正常,但性能不是最好的,因为它下载整个页面,如果我删除$output = curl_exec($ch);它返回0所有的时间.

有谁知道如何使性能更好？

Answer 1

首先确保URL实际上是否有效(字符串,而不是空,良好的语法),这可以快速检查服务器端.例如,首先执行此操作可以节省大量时间:

if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i', $url)){
    return false;
}

确保只获取标题,而不是正文内容:

@curl_setopt($ch, CURLOPT_HEADER  , true);  // we want headers
@curl_setopt($ch, CURLOPT_NOBODY  , true);  // we don't need body

有关获取URL状态http代码的更多详细信息,请参阅我发布的另一篇文章(它还有助于以下重定向):

• 如何通过PHP检查URL是否存在？

整体来说:

$url = 'http://www.example.com';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, true);    // we want headers
curl_setopt($ch, CURLOPT_NOBODY, true);    // we don't need body
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT,10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo 'HTTP code: ' . $httpcode;

Answer 2

// must set $url first....
$http = curl_init($url);
// do your curl thing here
$result = curl_exec($http);
$http_status = curl_getinfo($http, CURLINFO_HTTP_CODE);
curl_close($http);
echo $http_status;

Answer 3

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
$rt = curl_exec($ch);
$info = curl_getinfo($ch);
echo $info["http_code"];

Answer 4

试试PHP的" get_headers "功能.

有点像:

<?php
    $url = 'http://www.example.com';
    print_r(get_headers($url));
    print_r(get_headers($url, 1));
?>

Answer 5

curl_getinfo\xe2\x80\x94 获取有关特定传输的信息

\n\n

检查curl_getinfo

\n\n

<?php\n// Create a curl handle\n$ch = curl_init(\'http://www.yahoo.com/\');\n\n// Execute\ncurl_exec($ch);\n\n// Check if any error occurred\nif(!curl_errno($ch))\n{\n $info = curl_getinfo($ch);\n\n echo \'Took \' . $info[\'total_time\'] . \' seconds to send a request to \' . $info[\'url\'];\n}\n\n// Close handle\ncurl_close($ch);\n

\n