Php/docs/sem.constants
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预定义常量
下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
| Constant | Type | Changelog |
|---|---|---|
| MSG_IPC_NOWAIT | int | |
| MSG_EAGAIN | int | As of 5.2.0 |
| MSG_ENOMSG | int | As of 5.2.0 |
| MSG_NOERROR | int | |
| MSG_EXCEPT | int |
下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
| Constant | Type | Changelog |
|---|---|---|
| MSG_IPC_NOWAIT | int | |
| MSG_EAGAIN | int | As of 5.2.0 |
| MSG_ENOMSG | int | As of 5.2.0 |
| MSG_NOERROR | int | |
| MSG_EXCEPT | int |