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pcntl_signal_get_handler

(PHP 7 >= 7.1.0, PHP 8)

pcntl_signal_get_handler — Get the current handler for specified signal

Descrizione

pcntl_signal_get_handler(int $signal): callable|int

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

Elenco dei parametri

signal: The signal number.

Valori restituiti

This function may return an integer value that refers to SIG_DFL or SIG_IGN. If a custom handler has been set, that callable is returned.

Log delle modifiche

Versione	Descrizione
7.1.0	pcntl_signal_get_handler() has been added.

Esempi

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(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)
?>

Vedere anche:

pcntl_signal() - Installs a signal handler

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User Contributed Notes 2 notes

down

jrdbrndt at gmail dot com ¶

6 years ago


It is worth noting that supplying an invalid signal number will trigger a warning and return false.

down

-1

MAL ¶

3 years ago


If the signal handler is a Closure, the function itself is returned:

pcntl_signal(SIGHUP, function ($signo, $siginfo) {
    echo SIGHUP;
});

var_dump(pcntl_signal_get_handler(SIGHUP)); // Outputs: string(6) "SIGHUP"

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