pcntl_signal

Function • Params changed in PHP 8.6

Installs a signal handler.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

Improved

PHP 8.7

pcntl_signal(
    int $signal,
    $handler,
    ?bool $restart_syscalls = null
  ): bool

Typeint

The signal number.

If a callable is given, it must implement the following signature:

OptionalType?boolDefault valuenull

Specifies whether system call restarting should be used when this signal arrives.

Typebool

Returns true on success, false on failure

Changes to the `pcntl_signal` Function

Parameter type changed for parameter #3 ($restart_syscalls): bool to ?bool
Parameter default value changed for position #3 ($restart_syscalls): true to null

  pcntl_signal(
      int $signal,
      $handler,
-     bool $restart_syscalls = true
+     ?bool $restart_syscalls = null
    ): bool

  pcntl_signal(
-     $signo,
+     int $signal,
      $handler,
-     $restart_syscalls
+     bool $restart_syscalls = true
-   )
+   ): bool