Predefined Constants

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- Predefined Constants

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`MSG_IPC_NOWAIT` (int)
`MSG_EAGAIN` (int)
`MSG_ENOMSG` (int)
`MSG_NOERROR` (int)
`MSG_EXCEPT` (int)