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

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

(PHP 4, PHP 5, PHP 7) Outputs a file int readfile

(PHP 5 >= 5.3.0, PHP 7) Parse a configuration string

(PHP 4, PHP 5, PHP 7) Gets last access time of file

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5, PHP 7) Closes the file descriptor given by fd

(PECL xattr >= 0.9.0) Remove an extended attribute

(PECL xdiff >= 0.2.0) Merge 3 strings into one

(PHP 4, PHP 5, PHP 7) Reads entire file into an array

(PHP 4, PHP 5, PHP 7) Returns the current position of the file read/write pointer