php 一段 shmop

$size = 1024*1024;

$shm_key = ftok(__FILE__, 't');

$shm_id = shmop_open($shm_key, "c", 0644, $size);

$id = sem_get($shm_key);

$data = shmop_read($shm_id, 0, $size);

$arr = array(
        'time'=>time(),
        'data'=>uniqid()
    );

$size = shmop_write($shm_id, json_encode($arr), 0);

$data = shmop_read($shm_id, 0, $size);
sem_release($id);