Basic usage

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## Basic usage

Example #1 Shared Memory Operations Overview

    <?php   // Create 100 byte shared memory block with system id of 0xff3$shm_id = shmop_open(0xff3, "c", 0644, 100);if (!$shm_id) {    echo "Couldn't create shared memory segment\n";}// Get shared memory block's size$shm_size = shmop_size($shm_id);echo "SHM Block Size: " . $shm_size . " has been created.\n";// Lets write a test string into shared memory$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: " . $my_string . "\n";//Now lets delete the block and close the shared memory segmentif (!shmop_delete($shm_id)) {    echo "Couldn't mark shared memory block for deletion.";}shmop_close($shm_id);   ?>