(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
sem_remove — Remove a semaphore
sem_remove() removes the given semaphore.
After removing the semaphore, it is no longer accessible.
   成功时返回 true, 或者在失败时返回 false。
  
| 版本 | 说明 | 
|---|---|
| 8.0.0 | semaphoreexpects a SysvSemaphore
        instance now; previously, a resource was expected. |