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);