Näiden funktioiden käyttö ei vaadi erillisten ohjelmien asentamista; ne toimitetaan PHP:n mukana.
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.
Huomaa: The PATH_SEPARATOR was introduced with PHP 4.3.0-RC2.
For related functions such as dirname(), is_dir(), mkdir(), and rmdir(), see the Filesystem section.