Php/docs/function.pcntl-signal-get-handler

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pcntl_signal_get_handler

(PHP 7 >= 7.1.0)

pcntl_signal_get_handlerGet the current handler for specified signal


说明

pcntl_signal_get_handler ( int $signo ) : mixed

The pcntl_signal_get_handler() function will get the current handler for the specified signo.


参数

signo
The signal number.


返回值

This function may return an integer value that refers to SIG_DFL or SIG_IGN. If you set a custom handler a string value containing the function name is returned.


更新日志

版本 说明
7.1.0 pcntl_signal_get_handler() has been added.


范例

Example #1 pcntl_signal_get_handler() example

<?phpvar_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: int(0)function pcntl_test($signo) {}pcntl_signal(SIGUSR1, 'pcntl_test');var_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: string(10) "pcntl_test"pcntl_signal(SIGUSR1, SIG_DFL);var_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: int(0)pcntl_signal(SIGUSR1, SIG_IGN);var_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: int(1)?>

参见