php-language-standards

name	PHP Language Standards
description	Core PHP language standards and modern 8.x features.
metadata	{"labels":["php","language","8.x"],"triggers":{"files":["**/*.php"],"keywords":["declare","readonly","match","constructor","promotion","types"]}}

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

• Modern PHP Patterns