ftok

ftok

(PHP 4 >= 4.2.0, PHP 5, PHP 7)，ftok — Convert a pathname and a project identifier to a System V IPC key

Description

int ftok ( string $pathname , string $proj )

Parameters

pathname

Path to an accessible file.

proj

Project identifier. This must be a one character string.

Return Values：

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

Example

echo ftok(__DIR__,2);

return：8389859981351301200