Semaphore Functions
PHP Manual

ftok

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

Description

int ftok(string $filename, string $project_id)

The function converts the filename 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.

Parameters

filename

Path to an accessible file.

project_id

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

  • shmop_open
  • sem_get