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phpircauto-updatekeep-alive

Override previously used functions

I'm in the process of making an irc bot with PHP. While developing, I want to be able to dynamically load and unload classes/functions.

Mind you, the PHP is keep-alive.

ex:

Main File:

class stuff {

    function stuff() { echo 'this'; }

    function replaceFunction() {
        remove(stuff);
        add(stuff);
    }
}
$stuff = new stuff();

Next

I edit a function:

function stuff() { echo 'that'; }

So ideally, now that it's edited, all I have to do is trigger replaceFunction() to update the old function.

How can I make this actually work?

Solution

  • If the only thing you need is to have a class that has a function and you want to be able to exchange the functionality of that function by triggering the replaceFunction, you can assign some closure to that class or similar:

    class stuff {
    private $callback;
    public function __construct()
    {
        $this->callback = array($this, 'stuff');
    }

    public function __invoke()
    {
        call_user_func($this->callback);
    }   

    private function stuff() { echo 'This'; }

    function replace($function) {
        $this->callback = $function;
    }
}


$stuff = new stuff;

$stuff(); # original function

$stuff->replace(function() { echo 'That'; });

$stuff(); # replaced function

    Or the short version:

    $stuff = function() {echo 'This';};

$stuff(); # original function

$stuff = function() {echo 'That';};

$stuff(); # replaced function

    The class has the benefit that you have more control about assigning and invoking the function.