basic-twitter-image-service.php

<?

function genRandomString($length) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyz';
    $string = '';
    for ($p = 0; $p < $length; $p++) {
        $string .= $characters[mt_rand(0, strlen($characters))];
    }
    return $string;
}

$filetype = $_FILES['media']['type'];
if ($filetype == 'image/png')
	$filetype = '.png';
else if ($filetype == 'image/jpeg')
	$filetype = '.jpg';
else
	die('bad filetype');

$filename = genRandomString(4). $filetype;
while (file_exists($filename))
	$filename = genRandomString(5). $filetype;

move_uploaded_file($_FILES['media']['tmp_name'], $filename);

echo '<mediaurl>http://'.$_SERVER['SERVER_NAME'].dirname($_SERVER['PHP_SELF']).'/'.$filename.'</mediaurl>';
?>