= 4.0.4, PHP 5, PHP 7, PHP 8)shmop_read — Read data from shared memory block說明shmop_read(Shmop $shmop, int $offset, int $size): stri">

shmop_read

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

shmop_read — Read data from shared memory block

說明

shmop_read(Shmop $shmop, int $offset, int $size): string

shmop_read() will read a string from shared memory block.

參數

shmop

The shared memory block identifier created by shmop_open()

offset

Offset from which to start reading

size

The number of bytes to read. 0 reads shmop_size($shmid) - $start bytes.

返回值

Returns the data 或者在失敗時返回 false.

更新日志

版本 說明
8.0.0 shmop expects a Shmop instance now; previously, a resource was expected.

范例

示例 #1 Reading shared memory block

<?php
$shm_data = shmop_read($shm_id, 0, 50);
?>

This example will read 50 bytes from shared memory block and place the data inside $shm_data.

參見