(PHP 4 >= 4.2.0, PHP 5)

ftok --  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 (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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