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• #1529 mm00 aktív tag vakondka #1528

  Új Válasz 2008-05-24 14:01:06 #1529

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  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

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  mm00

  aktív tag

  válasz vakondka #1528 üzenetére

  fsockopen

  function isOnline($url) {
  if (!$url_info = parse_url($url)) {
  return false;
  }
  
  switch ($url_info['scheme']) {
  case 'https':
  $scheme = 'ssl://';
  $port = 443;
  break;
  case 'http':
  default:
  $scheme = '';
  $port = 80;
  }
  
  $data = "";
  $fid = @fsockopen($scheme . $url_info['host'], $port, $errno, $errstr, 30);
  if ($fid) {
  fputs($fid, 'HEAD ' . (isset($url_info['path'])? $url_info['path']: '/') . (isset($url_info['query'])? '?' . $url_info['query']: '') . " HTTP/1.0\r\n" .
  "Connection: close\r\n" .
  'Host: ' . $url_info['host'] . "\r\n\r\n");
  while (!feof($fid)) {
  $data .= @fgets($fid, 128);
  }
  fclose($fid);
  return !empty($data);
  } else {
  return false;
  }
  }

  Curl:

  function page_exists($url){
  $parts=parse_url($url);
  if(!$parts) return false; /* the URL was seriously wrong */
  
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  
  /* set the user agent - might help, doesn't hurt */
  curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
  
  /* try to follow redirects */
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
  
  /* timeout after the specified number of seconds. assuming that this script runs
  on a server, 20 seconds should be plenty of time to verify a valid URL. */
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
  curl_setopt($ch, CURLOPT_TIMEOUT, 20);
  
  /* don't download the page, just the header (much faster in this case) */
  curl_setopt($ch, CURLOPT_NOBODY, true);
  curl_setopt($ch, CURLOPT_HEADER, true);
  
  /* handle HTTPS links */
  if($parts['scheme']=='https'){
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  }
  
  $response = curl_exec($ch);
  curl_close($ch);
  
  /* get the status code from HTTP headers */
  if(preg_match('/HTTP\/1\.\d+\s+(\d+)/', $response, $matches)){
  $code=intval($matches[1]);
  } else {
  return false;
  };
  
  /* see if code indicates success */
  return (($code>=200) && ($code<400));
  }

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