1 file.inc file_get_mimetype($uri, $mapping = NULL)

Determines an Internet Media Type or MIME type from a filename.


$uri: A string containing the URI, path, or filename.

$mapping: An optional map of extensions to their mimetypes, in the form:

  • 'mimetypes': a list of mimetypes, keyed by an identifier,
  • 'extensions': the mapping itself, an associative array in which the key is the extension (lowercase) and the value is the mimetype identifier. If $mapping is NULL file_mimetype_mapping() is called.

Return value

The internet media type registered for the extension or: application/octet-stream for unknown extensions.

See also


Related topics


core/includes/file.inc, line 2378
API for handling file uploads and server file management.


function file_get_mimetype($uri, $mapping = NULL) {
  if ($wrapper = file_stream_wrapper_get_instance_by_uri($uri)) {
    return $wrapper->getMimeType($uri, $mapping);
  else {
    // getMimeType() is not implementation specific, so we can directly
    // call it without an instance.
    return BackdropLocalStreamWrapper::getMimeType($uri, $mapping);