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(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.

Related Function(s)

ftok()

shm_detach()