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Описание

resource shm_attach ( int $key [, int $memsize [, int $perm ]] )

shm_attach() returns an id that can be used to access the System V shared memory with the given key , the first call creates the shared memory segment with memsize and the optional perm-bits perm .

A second call to shm_attach() for the same key will return a different shared memory identifier, but both identifiers access the same underlying shared memory. memsize and perm will be ignored.

Список параметров

key: A numeric shared memory segment ID
memsize: The memory size. If not provided, default to the sysvshm.init_mem in the php.ini, otherwise 10000 bytes.
perm: The optional permission bits. Default to 0666.

Возвращаемые значения

Returns a shared memory segment identifier.

Смотрите также

shm_detach() - Disconnects from shared memory segment
ftok() - Convert a pathname and a project identifier to a System V IPC key