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(PHP 5 >= 5.3.0, PHP 7)

pcntl_sigprocmaskSets and retrieves blocked signals


bool pcntl_sigprocmask ( int $how , array $set [, array &$oldset ] )

The pcntl_sigprocmask() function adds, removes or sets blocked signals, depending on the how parameter.

Elenco dei parametri


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.


List of signals.


The oldset parameter is set to an array containing the list of the previously blocked signals.

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.


Example #1 pcntl_sigprocmask() example

$oldset = array();
pcntl_sigprocmask(SIG_UNBLOCK, array(SIGHUP), $oldset);

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