pcntl_sigprocmask
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
pcntl_sigprocmask — Sets and retrieves blocked signals
Description
pcntl_sigprocmask(int
$mode, array $signals, array &$old_signals = null): bool
The pcntl_sigprocmask() function adds, removes or sets blocked
signals, depending on the mode parameter.
Parameters
-
mode -
Sets the behavior of pcntl_sigprocmask(). Possible values:
SIG_BLOCK: Add the signals to the currently blocked signals.SIG_UNBLOCK: Remove the signals from the currently blocked signals.SIG_SETMASK: Replace the currently blocked signals by the given list of signals.
-
signals -
List of signals.
-
old_signals -
The
old_signalsparameter is set to an array containing the list of the previously blocked signals.
Return Values
Returns true on success or false on failure.
Examples
Example #1 pcntl_sigprocmask() example
<?php
pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
$oldset = array();
pcntl_sigprocmask(SIG_UNBLOCK, array(SIGHUP), $oldset);
?>
See Also
- pcntl_sigwaitinfo() - Waits for signals
- pcntl_sigtimedwait() - Waits for signals, with a timeout
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