PHP Manual
PCNTL 函数
Enable/disable asynchronous signal handling or return the old setting

pcntl_async_signals

(PHP 7 >= 7.1.0)

pcntl_async_signals — Enable/disable asynchronous signal handling or return the old setting

说明

pcntl_async_signals ([ bool $on = NULL ] ) : bool

If the on parameter is omitted, pcntl_async_signals() returns whether asynchronous signal handling is enabled. Otherwise, asynchronous signal handling is enabled or disabled.

参数

on: Whether asynchronous signal handling should be enabled.

返回值

When used as getter (that is without the optional parameter) it returns whether asynchronous signal handling is enabled. When used as setter (that is with the optional parameter given), it returns whether asynchronous signal handling was enabled before the function call.

参见

declare

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