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# shmop_size

(PHP 4 >= 4.0.4)

shmop_size -- Get size of shared memory block

## Description

``int shmop_size` (int shmid)`

shmop_size() is used to get the size, in bytes of the shared memory block.

shmop_size() takes the shmid, which is the shared memory block identifier created by shmop_open(), the function will return and int, which represents the number of bytes the shared memory block occupies.

Example 1. Getting the size of the shared memory block
    <?php
    $shm_size = shmop_size($shm_id);
    ?>

This example will put the size of shared memory block identified by `$shm_id` into `$shm_size`.

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