# shmop_size

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

shmop_size — Get size of shared memory block

### Description

shmop_size ( resource `$shmid` ) : int

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

### Parameters

`shmid`

  The shared memory block identifier created by shmop_open()

### Return Values

Returns an int, which represents the number of bytes the shared memory block occupies.

### Changelog

Version | Description
--- | ---
7.0.0 | The type of `shmid` has been changed from int to resource.

### Examples

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`.