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# ftok

(PHP 4 >= 4.2.0, PHP 5)

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

## Description

int ftok ( string pathname, string proj)

The function converts the `pathname` of an existing accessible file and a project identifier (`proj`) into a `integer` for use with for example shmop_open() and other System V IPC keys. The `proj` parameter should be a one character string.

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

See also shmop_open() and sem_get().

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