This PR was squashed before being merged into the 4.3-dev branch (closes #28898). Discussion ---------- [Console] Add dumper | Q | A | ------------- | --- | Branch? | master | Bug fix? | no | New feature? | yes | BC breaks? | no  | Deprecations? | no | Tests pass? | yes  | Fixed tickets | #...  | License | MIT | Doc PR | symfony/symfony-docs#10502 This PR adds a new `Dumper` helper in the Console component. As there are 2 types of dumps - debug purpose (e.g. `dd()`, `dump()`) - output purpose (see #24208, #27684) For the latter we cannot use the global system (debug) dumper, i.e. `VarDumper::dump()`, we need something tied to the current output and dependency free. Here it is: ```php $io = new SymfonyStyle($input, $output); $dumper = new Dumper($io); $io->writeln($dumper([-0.5, 0, 1])); $io->writeln($dumper(new \stdClass())); $io->writeln($dumper(123)); $io->writeln($dumper('foo')); $io->writeln($dumper(null)); $io->writeln($dumper(true)); ``` With VarDumper comonent: ![image](https://user-images.githubusercontent.com/1047696/47069483-4cc26f80-d1ef-11e8-902e-2f9b0f040f25.png) Without: ![image](https://user-images.githubusercontent.com/1047696/47069517-6663b700-d1ef-11e8-9328-ae1db0b83d7e.png) > #27684 (comment) var-dumper is not a mandatory dep of fwb, can we do without? Now we can :) Commits ------- fc7465c [Console] Add dumper

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