# 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` (integer)
  No special handling.
`FILEINFO_SYMLINK` (integer)
  Follow symlinks.
`FILEINFO_MIME_TYPE` (integer)
  Return the mime type. Available since PHP 5.3.0.
`FILEINFO_MIME_ENCODING` (integer)
  Return the mime encoding of the file. Available since PHP 5.3.0.
`FILEINFO_MIME` (integer)
  Return the mime type and mime encoding as defined by RFC 2045.
`FILEINFO_COMPRESS` (integer)
  Decompress compressed files. Disabled since PHP 5.3.0 due to thread safety issues.
`FILEINFO_DEVICES` (integer)
  Look at the contents of blocks or character special devices.
`FILEINFO_CONTINUE` (integer)
  Return all matches, not just the first.
`FILEINFO_PRESERVE_ATIME` (integer)
  If possible preserve the original access time.
`FILEINFO_RAW` (integer)
  Don't translate unprintable characters to a \ooo octal representation.
`FILEINFO_EXTENSION` (integer)
  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.