ftok

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

Convert a pathname and a project identifier to a System V IPC key

int ftok ( string $pathname, string $proj )

The function converts the pathname of an existing accessible file and a project identifier into an integer for use with for example shmop_open() and other System V IPC keys.

Parameters:

pathname

Path to an accessible file.

proj

Project identifier. This must be a one character string.

Returns:

On success the return value will be the created key value, otherwise -1 is returned.