(PHP >= 5.3.0, PECL fileinfo >= 0.1.0) Return information about a file

(PHP 4, PHP 5, PHP 7) Gets file type string filetype

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Flushes the output to a file

(PHP 4, PHP 5, PHP 7) Return an instance of the Directory class

(PECL xattr >= 0.9.0) Get a list of extended attributes

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Reads bytes from a file descriptor

(PECL xdiff >= 1.5.0) Make binary diff of two strings using the Rabin's polynomial fingerprinting algorithm

(PHP 4, PHP 5, PHP 7) Gets file owner int fileowner

(PHP 4, PHP 5, PHP 7) Returns the target of a symbolic link

(PHP 5 >= 5.1.2, PHP 7) Changes user ownership of symlink