[Lock][Cache] Allows URL DSN in PDO adapters

[jderusse]

Q	A
Branch?	4.4
Bug fix?	no
New feature?	yes
Deprecations?	no
Tickets	-
License	MIT
Doc PR	TODO

This PR duplicate a feature from PdoSessionHandler that convert URL DSN ( ie. mysql://localhost/test) into PDO DSN (ie. mysql:host=localhost;dbname=test)

that would ease configuration by using the same well-known variable

framework:
  lock: '%env(DATABASE_URL)%'

note: I applied the same change on Cache component for consistency.

[nicolas-grekas]

I would rather go with supporting those DSNs only when Dbal is found, to reuse the similar logic they have AFAIK. Doable?

[jderusse]

@nicolas-grekas done

[stof]

I would rather go with supporting those DSNs only when Dbal is found, to reuse the similar logic they have AFAIK. Doable?

That's less powerful than in other components (and makes these PDO-based implementation unusable on Heroku or Symfony Cloud without installing DBAL)

[nicolas-grekas]

That's less powerful than in other components

You mean PdoSessionHandler, are there more examples?
The requirement is really low here (using dbal, which is a better PDO) and the alternative too is ok (using a PDO DSN).
To me, the less code we maintain the better.

[stof]

the alternative too is ok (using a PDO DSN).

that's exactly what is not possible when the env variable is managed by the PaaS hosting.

[nicolas-grekas]

that's exactly what is not possible when the env variable is managed by the PaaS hosting.

well, then use dbal - we don't have to solve unreported problems.

[nicolas-grekas]

Thank you @jderusse.