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

# ftok

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

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

### Descrierea

ftok ( string `$pathname` , string `$proj` ) : int

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.

### Parametri

`pathname`

  Path to an accessible file.

`proj`

  Project identifier. This must be a one character string.

### Valorile întoarse

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

### A se vedea și

- shmop_open() - Create or open shared memory block
- sem_get() - Get a semaphore id