/**
* Test if an file is an allowed file type, by extension.
*
* $validate->rule('file', 'Ku_File::type', array('jpg, png, gif'));
* $validate->rule('file', 'Ku_File::type', array('.JPG, .PNG, .GIF'));
*
* @param mixed $_FILES item or filepath
* @param string allowed file extensions
* @return bool
*/
public static function type($file, $allowed)
{
if (is_string($allowed)) {
$allowed = explode(',', str_replace('.', '', $allowed));
$allowed = array_map('trim', $allowed);
}
$allowed = array_map('strtolower', $allowed);
if (is_array($file)) {
return Ku_Upload::type($file, $allowed);
}
if (empty($file) or basename($file) == $file) {
return TRUE;
}
$ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
return in_array($ext, $allowed);
}
