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PHP Manual [ftok]

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PHP Manual || Semaphore Functions

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

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


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.



Path to an accessible file.


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.

See Also

PHP Manual || Semaphore Functions