Check the response to an HTTP request to a URL

How browsers and search engine crawlers do they see your Web pages, what information is returned in response to an HTTP request?

Here is a script that performs the test, sends a request to the URL you specify and displays the code returned by the server. A form is included in the archive to enter the URL with a JavaScript script to run the PHP script on a remote or local server.

Source code

function sockAccess($server, $page)
{
  $errno="";
  $errstr="";
  $fp=0;
  $fp=fsockopen($server, 80, $errno, $errstr, 30);
  if($fp===0)
  {
    die("Error $errstr ($errno)");
  }
  $out="GET /$page HTTP/1.1\r\n";
  $out.="Host: $server\r\n";
  $out.="Connection: Close\r\n\r\n";
  fwrite($fp,$out);
  $content = "";
  $counter = 0;
  while (!feof($fp) && $counter < 8) 
  {
    $line = trim(fgets($fp, 128)); 
    if($counter == 0)
    {
      $code=trim(substr($line,9,4));
      $content = "<strong>Code retour: $code ";
      $label = "";
      switch(intval($code))
      {
        case 200: $label= " OK ";break;
        case 301: $label= " Redirection permanente"; break;
        case 302: $label= " Redirection temporaire"; break;
        case 404: $label= " Page non trouvée"; break;
        default:break;
      }
      $content.= $label."</strong><br><br>";
    }
    $content .= $line . "<br>";
    $counter++;
  }
  fclose($fp);
  return $content;
}

$url = $_POST['url'];
$parsed = parse_url($url);
$server = $parsed['host'];
$page = $parsed['path'];
$content=sockAccess($server, $page);
print_r($content);

Download

Full demo with this code and a form.

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