<?php
// Create 100 byte shared memory block with system id if 0xff3
$shm_id = shmop_open(0xff3, "c", 0644, 100);
if (!$shm_id)
echo "Couldn't create shared memory segment\n";
// Lets write a test string into shared memory
$shm_bytes_written = shmop_write($shm_id, "my shared memory block", 0);
if ($shm_bytes_written != strlen("my shared memory block"))
echo "Couldn't write the entire length of data\n";
// Now lets read the string back
$my_string = shmop_read($shm_id, 0, $shm_size);
if (!$my_string)
echo "Couldn't read from shared memory block\n";
echo "The data inside shared memory was: " . $my_string . "\n";
// Now lets delete the block and close the shared memory segment
if (!shmop_delete($shm_id))
echo "Couldn't mark shared memory block for deletion.";
shmop_close($shm_id);
?>