(PHP 4, PHP 5, PHP 7) Change directory bool chdir

(PECL xdiff >= 0.2.0) Make unified diff of two files

(PHP 4, PHP 5, PHP 7) Gets file group int filegroup

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Gets stat information about the file descriptor fd

(PHP 4, PHP 5, PHP 7) Renames a file or directory

(PECL xdiff >= 0.2.0) Alias of xdiff_string_bpatch

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Opens a file (creating it if necessary) at a lower level than

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Checks whether a file or directory exists