Php/docs/function.shmop-read
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shmop_read
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
shmop_read — Read data from shared memory block
Description
shmop_read
( Shmop $shmop
, int $offset
, int $size
) : string
shmop_read() will read a string from shared memory block.
Parameters
shmop
- The shared memory block identifier created by shmop_open()
offset
- Offset from which to start reading
size
- The number of bytes to read.
0
readsshmop_size($shmid) - $start
bytes.
Return Values
Returns the data or FALSE
on failure.
Changelog
Version | Description |
---|---|
8.0.0 | shmop expects a Shmop
instance now; previously, a resource was expected. |
Examples
Example #1 Reading shared memory block
<?php$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
.