php如何获取Http请求

$req_method = $_SERVER['REQUEST_METHOD'];
echo $req_method;

<?php
$fp = fsockopen(".example.", 80, $errno, $errstr, 30);
if (!$fp) {
 echo "$errstr ($errno)<br />\n";
} else {
 $out = "GET / HTTP/1.1\r\n";
 $out .= "Host: .example.\r\n";
 $out .= "Connection: Close\r\n\r\n";
 fwrite($fp, $out);
 while (!feof($fp)) {
  echo fgets($fp, 128);
 }
 fclose($fp);
}
?>