PHP Formatting: PSR-12 Standards for Professional Codebases

PHP's evolution from scripting language to enterprise framework brought PSR standards — the community-agreed formatting rules that make PHP codebases consistent across frameworks like Laravel, Symfony, and WordPress. PSR-12 is the current standard, and adhering to it signals professional PHP development.

What Is PHP Formatter?

PHP formatting applies PSR-12 rules: opening braces on new lines for classes/methods, 4-space indentation, use statement ordering, and visibility declarations. Our PHP Formatter transforms any PHP code to PSR-12 compliance.

How to Use PHP Formatter on DevToolHub

1. Open the PHP Formatter tool on DevToolHub — no signup required.
2. Paste or enter your input data in the left panel.
3. See the result instantly in the output panel.
4. Copy the result or download it as a file.

PSR-12 Class Formatting

See the standard structure for a PHP class:

<?php
// Before
class UserService {
private $repo;
public function __construct(UserRepository $repo){$this->repo=$repo;}
public function findActive():array{return $this->repo->findBy(["status"=>"active"]);}
}

// After (PSR-12)
class UserService
{
    private UserRepository $repo;

    public function __construct(UserRepository $repo)
    {
        $this->repo = $repo;
    }

    public function findActive(): array
    {
        return $this->repo->findBy([
            "status" => "active",
        ]);
    }
}

Pro Tips

• Opening braces go on the next line for classes and methods, same line for control structures
• Use PHP CS Fixer or PHP_CodeSniffer in CI to enforce PSR-12 automatically
• Declare strict_types=1 at the top of every file for type safety
• Order use statements alphabetically and group by type (classes, functions, constants)

When You Need This

• Formatting Laravel and Symfony code to framework conventions
• Standardizing WordPress plugin code to PSR-12
• Cleaning up legacy PHP code during modernization projects
• Preparing PHP code examples for technical documentation