(PHP 3 >= 3.0.6, PHP 4, PHP 5)
shm_attach -- Creates or open a shared memory segment
Description
int
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
(default: sysvshm.init_mem in the php.ini, otherwise
10000 bytes) and the optional perm-bits perm
(default: 0666).
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.
See also ftok(), and shm_detach().