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Posted By

tylerhall on 12/31/69


Tagged

curl http remote filesize file


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Get Remote Filesize

Published in: PHP 

Retrieves the filesize of a remote file. I can't take the credit for this function. I grabbed it somewhere online a few years back. Don't remember where.

Plain TextExpand 
  1. function remote_filesize($url, $user = "", $pw = "")
  2. {
  3. 	ob_start();
  4. 	$ch = curl_init($url);
  5. 	curl_setopt($ch, CURLOPT_HEADER, 1);
  6. 	curl_setopt($ch, CURLOPT_NOBODY, 1);
  7.  
  8. 	if(!empty($user) && !empty($pw))
  9. 	{
  10. 		$headers = array('Authorization: Basic ' .  base64_encode("$user:$pw"));
  11. 		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  12. 	}
  13.  
  14. 	$ok = curl_exec($ch);
  15. 	curl_close($ch);
  16. 	$head = ob_get_contents();
  17. 	ob_end_clean();
  18.  
  19. 	$regex = '/Content-Length:\s([0-9].+?)\s/';
  20. 	$count = preg_match($regex, $head, $matches);
  21.  
  22. 	return isset($matches[1]) ? $matches[1] : "unknown";
  23. }

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Posted By: adulau on December 28, 2006

Quite useful. In that example, you'll need curl compiled with PHP. Sometimes curl is not available, the same behavior could be achieved using a simple socket (fsockopen) connection in PHP. Using a HEAD request (fputs the corresponding request Headers) and get the value from the headers itself (matching Content-Length:) (as described in line 19. of the curl example). PHP 5 is including nifty function for HTTP connection handling and parsing the headers.

There is lengthy discussion about remote filesize on : http://be.php.net/function.filesize

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