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  • pcntl_async_signals()

    (PHP 7 >= 7.1.0)

    Enable/disable asynchronous signal handling or return the old setting

    说明

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

    If the$onparameter 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 enabledbeforethe function call.

    参见

    • declare

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