---
id: php-comments
title: "PHP Comments"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["PHP 주석"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["php", "programming", "w3schools", "comments"]
raw_sources: ["https://www.w3schools.com/php/php_comments.asp"]
applied_in: []
github_commit: ""
---

# [[PHP Comments]]

## 🎯 한 줄 통찰 (One-line insight)
PHP uniquely supports TWO single-line comment styles (`//` and `#`) where most languages offer just one — both are fully interchangeable and equally legal, a flexibility inherited from PHP's C-style (`//`) and shell-script-style (`#`) heritage. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Single-line comments** — `//` or `#`; everything to end-of-line is ignored. [S1]
- **Multi-line comments** — `/* ... */`. [S1]
- **Purposes** — explain code to others, remind yourself later, temporarily disable code for testing. [S1]
- **Ignoring code via comments** — commenting out a line prevents its execution. [S1]

## 📖 세부 내용 (Details)
- Two single-line styles: `// This is a single-line comment` and `# This is also a single-line comment`. [S1]
- Comment before code: `// Output welcome message echo 'Welcome Home!';`. [S1]
- Comment at line end: `echo 'Welcome Home!'; // Output welcome message`. [S1]
- Disabling code: `// echo 'Welcome Home!';` — the echo never runs. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 테스트 중 특정 코드 줄을 비활성화하는 용도로 주석이 자주 쓰인다. [S1]

## 💻 코드 패턴 (Code patterns)
Two equivalent single-line comment styles (PHP):
```php
// This is a single-line comment
# This is also a single-line comment
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.88
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[PHP Tutorial]]
- **관련 개념:** [[PHP Syntax]], [[PHP Comments Multiline]]
- **참조 맥락:** 한 줄 주석 문법 — 여러 줄 주석(Multiline) 챕터로 직접 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — PHP Comments — https://www.w3schools.com/php/php_comments.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "PHP Comments" page (Astra wiki-curation, P-Reinforce v3.1 format).