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10_Wiki/Dev/Topic_PHP/PHP_Comments.md

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+---
+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).