PHP 5: Shared Memory
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This class can be used to store and retrieve information in shared memory.
It can open a shared memory segment with a given key and store any data in this memory and read from it.
The class can also retrieve the value previously stored, even if it was in a previous request by a different user.
The class uses a mutex to prevent multiple requests storing and retrieving values from the memory at the same time.
Click here for detailed information about this class on phpclasses.org
Php Handleiding