Add support to prepend handler

[filips123]

Add support to prepend handler. When using this, handler should be added before other handlers. Also, don't forget to update RunInterface with new function.

I found simple solution:

public function prependHandler($handler)
{
    $existingHandlers = array_merge([$handler], $this->getHandlers());
    $this->clearHandlers();

    foreach ($existingHandlers as $existingHandler) {
        $this->pushHandler($existingHandler);
    }
}

[denis-sokolov]

The users of Whoops can perform this operation themselves if they need it. I believe most of the users will never encounter this situation, so I don’t think there’s a lot of valu in adding this feature. Change my mind if you have specific use cases!

[filips123]

I could be used if program first add some general handlers, but prepend additional handler under certain condition (maybe for additional debugging or other operations).

[denis-sokolov]

Thanks! I think for now we can afford to make the users perform the operation themselves. If we later see more use cases for this popup, we’ll revisit!

[filips123]

Ok. Do you have any solution how can users prepend handler themselves? My solution above could be inefficient because it needs to remove and then re-add all handlers.

[denis-sokolov]

Your solution above is absolutely adequate! I doubt you’ll measure a noticable impact on performance at all.

[denis-sokolov]

#630 has just added this, released in 2.4.0.