Symfony 3.4: How to get a list of all Deprecated warnings?

I use the sensiolabs-de/deprecation-detector first to find a lot of them but you never cover them all with that tool.

After that, you can go trough the .md files in your Symfony project, they are located at

• vendor/symfony/symfony/UPGRADE-3.0.md
• vendor/symfony/symfony/UPGRADE-3.1.md
• vendor/symfony/symfony/UPGRADE-3.2.md
• vendor/symfony/symfony/UPGRADE-3.3.md
• vendor/symfony/symfony/UPGRADE-3.4.md
• vendor/symfony/symfony/UPGRADE-4.0.md

Or you can read them online https://github.com/symfony/symfony/tree/3.4

Start with the first one (3.0). Take your time and read carefully.

Make use of a good tool to search your Symfony project (PHPStorm, Netbeans, Sublime, ...)

Everything should be in there, good luck!

When you have a good IDE (like PHPStorm) you can use its code inspection tool. I just inspected the src code of a legacy project in PHPStorm and got this as result:

So still a lot of work to do ;)

may be this will help you to get all deprications:

composer global require sensiolabs-de/deprecation-detector$ deprecation-detector check src/ vendor/$ deprecation-detector check src/ composer.lock

You can look here for more information: https://github.com/sensiolabs-de/deprecation-detector

This is how you scan your files for deprecated code:

$ git clone git@github.com:sensiolabs-de/deprecation-detector.git$ cd deprecation-detector$ composer install$ ./bin/deprecation-detector check /path/to/your-project/src /path/to/your-project/vendor

Source Paving the way for Symfony 3 with the "Deprecation Detector" tool