(PHP 5 >= 5.1.0, PHP 7) Format line as CSV and write to file pointer

(PHP 4, PHP 5, PHP 7) Portable advisory file locking

(PHP 4, PHP 5, PHP 7) Output all remaining data on a file pointer

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Tells whether the file was uploaded via HTTP POST

(PHP 5, PHP 7) Write a string to a file int file_put_contents

(PHP 4, PHP 5, PHP 7) Returns a parent directory's path

(PHP 4, PHP 5, PHP 7) Sets access and modification time of file

(PHP 4, PHP 5, PHP 7) Deletes a file bool unlink

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

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Reads entire file into a string