Understanding PSR-12 & Modern PHP Formatting
PHP Standard Recommendation 12 (PSR-12), developed by the PHP-FIG (Framework Interoperability Group), extends and supersedes PSR-2 to establish standard styling rules for contemporary PHP codebases. Cleanly formatted code prevents Git diff clutter, simplifies code reviews across distributed teams, and ensures compatibility with automated tools like PHP CS Fixer and Pint.
Brace Positioning Standards
Under PSR-12, opening braces for classes, interfaces, traits, and functions must be placed on a new line, whereas control flow statements (such as if, foreach, and while) place opening braces on the same line.
Array & Argument Organization
Modern PHP favors short array syntax [...] over legacy array(...) calls. Structured formatting provides clean indentation for multidimensional configuration arrays and Eloquent query options.
Core PSR-12 Formatting Standards
| Code Structure | PSR-12 Requirement | Standard Example | Primary Benefit |
|---|---|---|---|
| Indentation | 4 spaces per level (no tabs) | return $result; | Prevents mixed-tab rendering discrepancies across IDEs |
| Class Declarations | Opening brace on next line | class User { } | Standardized class boundary scanning |
| Method Declarations | Opening brace on next line | public function run(): void { } | Clear separation of method signatures from bodies |
| Control Structures | Opening brace on same line | if ($status) { | Compact, readable conditional execution blocks |
Frequently Asked Questions
Does this formatter adhere to modern PSR-12 coding guidelines?
Yes. It structures classes and methods with 4-space indentations, places opening braces on dedicated newlines for classes and functions, cleans visibility modifiers, and preserves namespace declarations.
Does it support modern PHP features like match expressions and attributes?
Yes. The tokenizer accommodates PHP 8.0+ constructs including match expressions, named parameters, nullsafe operators (?->), arrow functions (fn), and PHP attributes (#[...]).
Is my proprietary PHP backend code transmitted to a remote server?
No. The entire lexical parsing and code indentation logic run 100% locally inside your web browser's JavaScript memory. Zero code or credentials are ever sent across the network.