Guesses the mime type of the file with the given path.
string $path The path to the file:
string The mime type or NULL, if none could be guessed
FileNotFoundException If the file does not exist
AccessDeniedException If the file could not be read
Overrides MimeTypeGuesserInterface::guess
public function guess($path) {
if (!is_file($path)) {
throw new FileNotFoundException($path);
}
if (!is_readable($path)) {
throw new AccessDeniedException($path);
}
if (!self::isSupported()) {
return null;
}
ob_start();
// need to use --mime instead of -i. see #6641
passthru(sprintf($this->cmd, escapeshellarg($path)), $return);
if ($return > 0) {
ob_end_clean();
return null;
}
$type = trim(ob_get_clean());
if (!preg_match('#^([a-z0-9\\-]+/[a-z0-9\\-]+)#i', $type, $match)) {
// it's not a type, but an error message
return null;
}
return $match[1];
}