(PHP 4 >= 4.0.4, PHP 5, PHP 7)
shmop_read — Read data from shared memory block
$shmid
, int $start
, int $count
)shmop_read() will read a string from shared memory block.
shmidThe shared memory block identifier created by shmop_open()
startOffset from which to start reading
count
The number of bytes to read.
0 reads shmop_size($shmid) - $start bytes.
Returns the data 或者在失败时返回 FALSE.
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.