# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`FILEINFO_NONE` (int)
  No special handling.
`FILEINFO_SYMLINK` (int)
  Follow symlinks.
`FILEINFO_MIME_TYPE` (int)
  Return the mime type. Available since PHP 5.3.0.
`FILEINFO_MIME_ENCODING` (int)
  Return the mime encoding of the file. Available since PHP 5.3.0.
`FILEINFO_MIME` (int)
  Return the mime type and mime encoding as defined by RFC 2045.
`FILEINFO_COMPRESS` (int)
  Decompress compressed files. Disabled since PHP 5.3.0 due to thread safety issues.
`FILEINFO_DEVICES` (int)
  Look at the contents of blocks or character special devices.
`FILEINFO_CONTINUE` (int)
  Return all matches, not just the first.
`FILEINFO_PRESERVE_ATIME` (int)
  If possible preserve the original access time.
`FILEINFO_RAW` (int)
  Don't translate unprintable characters to a `\ooo` octal representation.
`FILEINFO_EXTENSION` (int)
  Returns the file extension appropriate for the MIME type detected in the file. For types that commonly have multiple file extensions, such as `JPEG` images, then the return value is multiple extensions separated by a forward slash e.g.: `"jpeg/jpg/jpe/jfif"`. For unknown types not available in the magic.mime database, then return value is `"???"`. Available since PHP 7.2.0.