klaussilveira edited this page Aug 17, 2011 · 2 revisions
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SimpleSHM is a simple and small abstraction layer for shared memory manipulation using PHP. It makes use of the SHMOP functions, built into most PHP packages.

Authors and contributors


New BSD license


  • add support for arrays, by automatically serializing or converting to JSON
  • add support for objects, by using JSON
  • create a better documentation
  • error handling can, and should, be improved
  • test, test, test

About Shared Memory

Shared Memory is an efficient mean of exchanging data between applications in the same machine. One application will create a memory portion which other processes can access, as long as they have the proper permissions. You can read more about it here: http://stereochro.me/assets/uploads/notes/dcom3/shmem.pdf

Using SimpleSHM

The idea behind SimpleSHM is to keep things very easy to use. If you want better control and flexibility, you can always modify the class or extend it.


 * Creating new block, with a random ID
$memory = new SimpleSHM;
echo $memory->read();

 * Creating new block, with an specified ID
$new = new SimpleSHM(897);
echo $new->read();

 * Reading an existing block, with the ID of 42
$existing = new SimpleSHM(42);
echo $existing->read();