PHP Language Standards
Priority: P0 (CRITICAL)
Structure
src/
└── {Namespace}/
└── {Class}.php
Implementation Guidelines
- Strict Typing: Declare
declare(strict_types=1); at file top.
- Type Hinting: Apply scalar hints and return types to all members.
- Modern Types: Use Union (
string|int) and Intersection types.
- Read-only: Use
readonly for immutable properties.
- Constructor Promotion: Combine declaration and assignment in
__construct.
- Match Expressions: Prefer
match over switch for value returns.
- Named Arguments: Use for readability in optional parameters.
Anti-Patterns
- No Type Context: Avoid functions without return or parameter types.
- Sloppy Comparison: No ==: Use
=== for strict comparison.
- Legacy Syntax: No switch: Use
match for simple value mapping.
- Global Scope: No Globals: Never define logic in global namespace.
References
