shmop_read

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

shmop_readRead data from shared memory block

说明

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

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

参数

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 或者在失败时返回 false.

更新日志

版本 说明
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_id050);
?>

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

参见