在 PHP 中执行此 cURL

Question

如何在 PHP 中完成此操作

curl -I http://www.google.com | grep "Server:"

？是否可以仅回显 Linux 等操作系统或网站的 Windows，例如使用curl 回显 Web 服务器

My Try

<?
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL,"http://google.com");
curl_setopt ($ch, CURLOPT_HEADER, 1);
$data = curl_exec ($ch);
curl_close ($ch);
echo $data  ;

?>

Answer 1

<?php
// create a new cURL resource                                                                                                                                
$ch = curl_init();

// set URL and other appropriate options                                                                                                                     
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/");
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// grab URL and pass it to the browser                                                                                                                       
$result = curl_exec($ch);

/* Curl returns multiple headers, if the last action required multiple                                                                                       
 * requests, e.g. when doing Digest authentication. Only parse the                                                                                           
 * headers of the latest response. */
preg_match_all('/(^|\r\n\r\n)(HTTP\/)/', $result, $matches, PREG_OFFSET_CAPTURE);
$startOfHeaders = $matches[2][count($matches[2]) - 1][1];
$endOfHeaders = strpos($result, "\r\n\r\n", $startOfHeaders);
$headers = substr($result, $startOfHeaders, $endOfHeaders - $startOfHeaders);
$headers = preg_split("/\r?\n/", $headers);
foreach ($headers as $headerLine) {
  if (preg_match('|^Server:\s+(.+)|', $headerLine, $m)) {
    var_dump($m[1]);
  }
}

// close cURL resource, and free up system resources                                                                                                         
curl_close($ch);

基本上，这是Horde_Http 库的摘录。具体来说Curl 请求 和 Curl 响应 处理程序。

它比您使用“grep”命令所做的要复杂一些，但看起来您想分析响应标头。这就是为什么我在代码中留下了更复杂的标头分析。