shmop_read

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

shmop_read — Read data from shared memory block

shmop_read ( resource $shmid , int $start , int $count ) : string

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

shmid: The shared memory block identifier created by shmop_open()
start: Offset from which to start reading
count: The number of bytes to read. 0 reads shmop_size($shmid) - $start bytes.

Returns the data 或者在失败时返回 FALSE.

版本	说明
7.0.0	The type of `shmid` has been changed from int to resource.

Example #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.