pcntl_signal_get_handler

(PHP 7.1)

pcntl_signal_get_handlerGet the current handler for specified signal

说明

int|string pcntl_signal_get_handler ( int $signo )

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

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范例

Example #1 pcntl_signal_get_handler() example

<?php
var_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(SIGUSR1SIG_DFL);
var_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: int(0)

pcntl_signal(SIGUSR1SIG_IGN);
var_dump(pcntl_signal_get_handler(SIGUSR1)); // Outputs: int(1)
?>

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