(PHP 4, PHP 5, PHP 7) Copies file bool copy (

(PHP 4, PHP 5, PHP 7) Tells whether the filename is a directory

(PHP 4, PHP 5, PHP 7) Tells whether the filename is writable

(PHP 4, PHP 5, PHP 7) Tells whether the filename is a regular file

(PECL xattr >= 0.9.0) Set an extended attribute

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Detect MIME Content-type for a file

(PHP 4, PHP 5, PHP 7) Opens process file pointer

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

(PHP 4, PHP 5, PHP 7) Gets information about a link

(PHP 4, PHP 5, PHP 7) Binary-safe file write