POSIX Functions
PHP Manual

posix_mkfifo

Create a fifo special file (a named pipe)

Description

bool posix_mkfifo ( string $pathname , int $mode )

posix_mkfifo creates a special FIFO file which exists in the file system and acts as a bidirectional communication endpoint for processes.

Parameters

pathname

Path to the FIFO file.

mode

The second parameter mode has to be given in octal notation (e.g. 0644). The permission of the newly created FIFO also depends on the setting of the current umask. The permissions of the created file are (mode & ~umask).

Return Values

Returns TRUE on success or FALSE on failure.

Notes

Note: When safe mode is enabled, PHP checks whether the files or directories being operated upon have the same UID (owner) as the script that is being executed.