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-methods
+title: "PHP OOP Static Methods"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["static keyword", "parent::", "PHP 정적 메서드"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+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_methods.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[PHP OOP Static Methods]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Calling a static method from a CHILD class requires the `parent::` keyword instead of the class name, even though the static method literally belongs to a specific class — this differs from calling a static method from an unrelated class (which uses the explicit class name like `A::welcome()`), showing `parent::` is reserved specifically for the inheritance relationship. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`static` keyword** — creates a method callable WITHOUT instantiating the class first. [S1]
+- **Access via `ClassName::method()`** — the standard way to call a static method from outside. [S1]
+- **Access via `self::method()`** — used to call a static method from a non-static method WITHIN the same class (e.g., inside a constructor). [S1]
+- **Cross-class static calls** — a static method must be `public` to be called from another class's method. [S1]
+- **Access via `parent::method()`** — used specifically when a child class wants to call a static method defined in its parent. [S1]
+
+## 📖 세부 내용 (Details)
+- Direct static call: `class greeting { public static function welcome() { echo "Hello World!"; } } greeting::welcome();`. [S1]
+- Static call with arguments: `class calc { public static function sum($x, $y) { return $x * $y; } } $res = calc::sum(6, 4);`. [S1]
+- Static called via self from constructor: `class greeting { public static function welcome() {...} public function __construct() { self::welcome(); } } new greeting();`. [S1]
+- Static called from another class: `class A { public static function welcome() {...} } class B { public function message() { A::welcome(); } }`. [S1]
+- Static called via parent:: from a child class: `class domain { protected static function getWebsiteName() { return "W3Schools.com"; } } class domainW3 extends domain { public $websiteName; public function __construct() { $this->websiteName = parent::getWebsiteName(); } }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **상속 관계에서의 특수 키워드**: 자식 클래스에서 부모의 정적 메서드를 호출할 때는 클래스 이름이 아니라 parent:: 키워드를 사용해야 한다는 점이 강조됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 부모 클래스의 protected static 메서드를 자식 클래스 생성자에서 parent::로 호출하는 것이 실전 활용의 대표 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Calling a parent's static method from a child class (PHP):
+```php
+class domain {
+    protected static function getWebsiteName() {
+        return "W3Schools.com";
+    }
+}
+class domainW3 extends domain {
+    public $websiteName;
+    public function __construct() {
+        $this->websiteName = parent::getWebsiteName();
+    }
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.90
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[PHP Tutorial]]
+- **관련 개념:** [[PHP OOP Traits]], [[PHP OOP Static Properties]]
+- **참조 맥락:** 인스턴스 없이 호출 가능한 메서드 — 정적 속성(Static Properties) 챕터로 직접 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — PHP OOP - Static Methods — https://www.w3schools.com/php/php_oop_static_methods.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "PHP OOP Static Methods" page (Astra wiki-curation, P-Reinforce v3.1 format).