use class_alias instead of DynamicParent class and autoload with psr-0

[raffaelj]

I found a cleaner solution to dynamically load Parsedown or ParsedownExtra as parent: class_alias.

Here is my implementation in action:
https://codeberg.org/raffaelj/parsedown-tasks/src/branch/main/ParsedownTasks.php#L6-L14

This removes one problem of multiple classes named DynamicParent in the global scope, when trying to mix multiple Parsedown addons, that use that same technique.

If you want to implement it, make sure to check for is_callable('parent::__construct') in your constructor to fix the missing constructor in Parsedown.

And while I'm here - instead of opening another issue - it's better to autoload with psr-0 instead of with files. The difference is, that autoloading with files always includes the file, when require(__DIR__.'/vendor/autoload.php'); is called. Autoloading with psr-0 only includes the file when the class is in use, e. g. $test = new Test();. This is a huge performance improvement when dealing with many classes.

Thanks again for your work and have a nice day,
Raffael

[BenjaminHoegh]

Now I wonder how I did not stumble upon class_alias before, it is amazing :D

I will implement your changes :)

[raffaelj]

Now I wonder how I did not stumble upon class_alias before, it is amazing :D

I reacted the same way. When I followed an outdated example on StackOverflow for working with SMTP in WordPress, I found this simple function, that changes everything. WordPress uses this technique to throw a deprection notice for a renamed vendor namespace.

It feels like a hack - and it probably is one. So don't over-use it, when there are better alternatives. But extending Parsedown 1.x, feels like the perfect match.

[raffaelj]

You missed one point:

If you want to implement it, make sure to check for is_callable('parent::__construct') in your constructor to fix the missing constructor in Parsedown.

[raffaelj]

And you can replace lines like

$Block = ParsedownTocParentAlias::blockHeader($Line);

with

$Block = parent::blockHeader($Line);

[BenjaminHoegh]

wait why did I not thing about that... that make so much sense