(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
shmop_write — Write data into shared memory block
shmop_write() will write a string into shared memory block.
shmopThe shared memory block identifier created by shmop_open()
dataA string to write into shared memory block
offsetSpecifies where to start writing data inside the shared memory segment. The offset must be greater than or equal to zero and less than or equal to the actual size of the shared memory segment.
The size of the written data.
If offset is out of range, or a read-only shared memory segment
should be written to, a ValueError is thrown.
| Version | Description |
|---|---|
| 8.0.0 |
Prior to PHP 8.0.0, false was returned on failure.
|
| 8.0.0 |
shmop expects a Shmop
instance now; previously, a resource was expected.
|
Example #1 Writing to shared memory block
<?php
$shm_bytes_written = shmop_write($shm_id, $my_string, 0);
?>
This example will write data inside $my_string into
shared memory block, $shm_bytes_written will contain
the number of bytes written.