function ExtensionMimeTypeGuesser::guessMimeType

File

core/lib/Drupal/Core/File/MimeType/ExtensionMimeTypeGuesser.php, line 26

Class

ExtensionMimeTypeGuesser

Makes possible to guess the MIME type of a file using its extension.

Namespace

Code

public function guessMimeType($path) : ?string {
  $file_parts = explode('.', basename($path));
  // Remove the first part: a full filename should not match an extension,
  // then iterate over the file parts, trying to find a match.
  // For 'my.awesome.image.jpeg', we try: 'awesome.image.jpeg', then
  // 'image.jpeg', then 'jpeg'.
  // We explicitly check for NULL because that indicates that the array is
  // empty.
  while (array_shift($file_parts) !== NULL) {
    $extension = strtolower(implode('.', $file_parts));
    if ($mimeType = $this->map
      ->getMimeTypeForExtension($extension)) {
      return $mimeType;
    }
  }
  return NULL;
}