docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: php-oop-static-properties
+title: "PHP OOP Static Properties"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["static properties", "PHP 정적 속성"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.89
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["php", "programming", "w3schools", "oop", "static"]
+raw_sources: ["https://www.w3schools.com/php/php_oop_static_properties.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[PHP OOP Static Properties]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A child class can read a parent's static property TWO different ways with different syntax for each — `x::$value` (via the child's OWN class name, since it inherited the static property) or `parent::$value` from inside a method — showing that static properties are inherited and directly accessible through the child's name, unlike static methods which more often route through `parent::`. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`static` property** — declared like `public static $prop = value;`; accessible without instantiating the class. [S1]
+- **Access via `ClassName::$prop`** — the standard external access syntax (uses `$` before the property name, unlike static methods). [S1]
+- **Access via `self::$prop`** — used inside a method of the same class. [S1]
+- **Access via `parent::$prop`** — used inside a child class's method to reach the parent's static property. [S1]
+- **Direct inherited access** — a static property is also directly reachable via the CHILD class name (`x::$value`) since it's inherited, without needing `parent::`. [S1]
+
+## 📖 세부 내용 (Details)
+- Direct static property access: `class pi { public static $value = 3.14159; } echo pi::$value;`. [S1]
+- Access via self inside a method: `class pi { public static $value=3.14159; public function staticValue() { return self::$value; } } $pi = new pi(); echo $pi->staticValue();`. [S1]
+- Child class access — both direct and via parent::: `class pi { public static $value=3.14159; } class x extends pi { public function xStatic() { return parent::$value; } } echo x::$value; // direct, works because inherited $x = new x(); echo $x->xStatic(); // via parent:: inside a method`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 원주율(pi)처럼 클래스 전체가 공유하는 상수적 값을 정적 속성으로 표현하는 것이 대표 실전 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Accessing an inherited static property directly via the child class name (PHP):
+```php
+class pi {
+    public static $value = 3.14159;
+}
+class x extends pi {
+    public function xStatic() { return parent::$value; }
+}
+echo x::$value;          // direct access via child class name (inherited)
+$x = new x();
+echo $x->xStatic();      // access via parent:: inside a method
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.89
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[PHP Tutorial]]
+- **관련 개념:** [[PHP OOP Static Methods]], [[PHP Namespaces]]
+- **참조 맥락:** OOP 섹션의 마지막 — 네임스페이스(Namespaces) 섹션으로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — PHP OOP - Static Properties — https://www.w3schools.com/php/php_oop_static_properties.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "PHP OOP Static Properties" page (Astra wiki-curation, P-Reinforce v3.1 format).