Get mime type of external file using cURL and php

I've used mime_content_type() and File info but i never successed. i want to use now cURL with PHP and get the headers of the file which is hosted on another domain then extract & determine if the type is MP3 or not. ( i think the mime type of MP3 is audio/mpeg )

Briefly, i know that but i don't know how to apply it :)



PHP curl_getinfo()
  # the request
  $ch = curl_init('');
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

  # get the content type
  echo curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

  # output
  text/html; charset=ISO-8859-1

curl -I

HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=UTF-8
Date: Fri, 09 Apr 2010 20:35:12 GMT
Expires: Sun, 09 May 2010 20:35:12 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219

You can use a HEAD request via curl. Like:

$ch = curl_init();
$url = '';
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$results = explode("\n", trim(curl_exec($ch)));
foreach($results as $line) {
        if (strtok($line, ':') == 'Content-Type') {
                $parts = explode(":", $line);
                echo trim($parts[1]);

Which returns: image/png

If you are ok with a more elegant Zend Framework version, here is a class which makes use of Zend_Http_Client component.

Use it like so:

$sniffer = new Smartycode_Http_Mime(); 
$contentType = $sniffer->getMime($url);

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