$file = $_FILES['media'];  



if (!in_array($file['type'], array('image/png','image/jpeg','image/gif'))) { [/B] [B] 

echo '<span style="color:#CC0000;">Not a valid file type, please upload PNG, JPEG or GIF images only.</span>';  

exit;  

}  



$postfields = array(); [/B] [B] 

$postfields['username'] = $username;  

$postfields['password'] = $password;  

$postfields['media'] = "@$file['tmp_name']"; 



$twitter_url = 'http://twitpic.com/api/upload'; [/B] [B] 

$curl = curl_init();  

curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 2);  

curl_setopt($curl, CURLOPT_HEADER, false);  

curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);  

curl_setopt($curl, CURLOPT_BINARYTRANSFER, 1);  

curl_setopt($curl, CURLOPT_URL, $twitter_url);  

curl_setopt($curl, CURLOPT_POST, 3);  

curl_setopt($curl, CURLOPT_POSTFIELDS, $postfields);  

$result = curl_exec($curl);  

curl_close($curl);  

$login_xml = new SimpleXMLElement($result);  

if (isset($login_xml->error)) {  

print_r($login_xml);  

} else {  

print_r($login_xml);  

}