shmop_write
Write data into shared memory block
Description
int shmop_write(Shmop $shmop
, string $data
, int $offset
)
Parameters
-
shmop
-
The shared memory block identifier created by
shmop_open
-
data
-
A string to write into shared memory block
-
offset
-
Specifies 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.
Return Values
The size of the written data
.
Errors/Exceptions
If offset
is out of range, or a read-only shared memory segment
should be written to, a ValueError is thrown.
Examples
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.