shm_attach

shm_attach

Creates or open a shared memory segment

 **shm_attach** int $key  $size int $permissions

returns an id that can be used to access

the System V shared memory with the given , the first call creates the shared memory segment with and the optional perm-bits . shm_attach``key``size``permissions

A second call to for the same will return a different instance, but both instances access the same underlying shared memory. and will be ignored. shm_attach``key``SysvSharedMemory``size``permissions

keyA numeric shared memory segment ID

size The memory size. If not provided, default to the in the php.ini, otherwise 10000 bytes. sysvshm.init_mem

permissionsThe optional permission bits. Default to 0666.

Returns a instance on success, return.falseforfailure. SysvSharedMemory

shm_detach``ftok