(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Writes data to fd with optional truncation at length

(PHP 4, PHP 5, PHP 7) Clears file status cache

(PHP 4, PHP 5, PHP 7) Gets file permissions int

(PECL xdiff >= 1.5.0) Make binary diff of two files

(PECL xdiff >= 0.2.0) Patch a string with an unified diff

(PHP 4, PHP 5, PHP 7) Gets file modification time

(PECL xdiff >= 0.2.0) Alias of xdiff_string_bpatch

(PHP 5 >= 5.3.2, PHP 7) Get realpath cache size

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Performs a c library fcntl on fd

(PECL xdiff >= 1.5.0) Patch a file with a binary diff