Description:
------------
The documentation page for pcntl_signal():
http://php.net/manual/en/function.pcntl-signal.php

Shows the following signature:

bool pcntl_signal ( int $signo , callable $handler [, bool $restart_syscalls = 
true ] )

But the documentation for $handler says:

> The signal handler which may be the name of a user created function,
> or method, or either of the two global constants SIG_IGN or SIG_DFL.

So the method signature should be:

bool pcntl_signal ( int $signo , int|callable $handler [, bool $restart_syscalls 
= true ] )

Expected result:
----------------
bool pcntl_signal ( int $signo , int|callable $handler [, bool $restart_syscalls = 
true ] )

Actual result:
--------------
bool pcntl_signal ( int $signo , callable $handler [, bool $restart_syscalls = 
true ] )