ftok
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
ftok — Convert a pathname and a project identifier to a System V IPC key
說明
ftok(string
$filename, string $project_id): int 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.
參數
-
filename Path to an accessible file.
-
project_id Project identifier. This must be a one character string.
返回值
On success the return value will be the created key value, otherwise -1 is returned.
參見
- shmop_open() - Create or open shared memory block
- sem_get() - Get a semaphore id