# shmop_size

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

shmop_size — Get size of shared memory block

### 说明

shmop_size(Shmop `$shmop`): int

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

### 参数

`shmop`

  The shared memory block identifier created by shmop_open()

### 返回值

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

### 更新日志

版本 | 说明
--- | ---
8.0.0 | `shmop` expects a Shmop instance now; previously, a resource was expected.

### 示例

示例 #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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