(PHP 4 >= 4.2.0, PHP 5, PHP 7)
ftok — Convert a pathname and a project identifier to a System V IPC key
$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.
pathnamePath to an accessible file.
projProject identifier. This must be a one character string.
On success the return value will be the created key value, otherwise -1 is returned.