2-php@8

A set of PHP 8 coding rules for adding clear types, modern language features, structured errors, and consistent class design.

In plain words
What is it for?
It guides the writing of PHP classes, functions, exceptions, enumerations, interfaces, and nullable values.
Why use it?
It prevents unclear or loosely typed PHP code and gives developers consistent patterns to follow as a project grows.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/cmnemoi/cursor-rules/2-php-8
Clone the repo
git clone --depth 1 https://github.com/cmnemoi/cursor-rules

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 289 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00289
Opus 5 $0.00000 $0.00144
Sonnet 5 $0.00000 $0.00058
Haiku 4.5 $0.00000 $0.00029

Measured yesterday against content hash 39c10d3fc32b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

2-php@8 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

general-rules/.cursor/rules/02-programming-languages/[email protected] · 45 lines

What it actually says

Strict Types:

  • Always use declare(strict_types=1)
  • Type all properties, parameters, and return types
  • Use union types instead of docblocks
  • Use nullable types with ? prefix

Classes and Functions:

  • Make classes final by default
  • Use constructor property promotion
  • Make immutable classes readonly
  • Use named arguments for clarity
  • Use attribute validation over manual checks
  • Put private methods at the bottom of the file

Nullability:

  • Return early to avoid nested conditionals
  • Use null coalescing operator ?? over ternary
  • Use null safe operator ?-> for method chains
  • Throw exceptions instead of returning null

Enumerations:

  • Use native PHP 8.1 backed enums for constants
  • Access enum cases with :: not string values

Error Handling:

  • Use typed exceptions for domain errors
  • Catch specific exceptions, not generic Exception
  • Use match expressions over switch statements
  • Throw early, catch late

Interfaces and Traits:

  • Suffix interfaces with Interface

Modern Features:

  • Use named arguments for clarity
  • Use spread operator for array merging
  • Use first-class callable syntax
  • Use array unpacking for destructuring
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 45 lines · 289 tokens per session scan A 39c10d3fc32b

Subscribe to this mod's changes

2-php@8 is a cursor rule published in the GitHub repository cmnemoi/cursor-rules (2 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 289 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.