docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

10_Wiki/Topic_Programming/Topic_PHP/PHP_Superglobals_Get.md

@@ -0,0 +1,68 @@
+---
+id: php-superglobals-get
+title: "PHP Superglobals Get"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["$_GET", "query string", "PHP GET 슈퍼글로벌"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["php", "programming", "w3schools", "superglobals", "get", "forms"]
+raw_sources: ["https://www.w3schools.com/php/php_superglobals_get.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[PHP Superglobals Get]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`$_GET` data can arrive via TWO independent paths that both end up in the same array — a manually-typed URL query string (`?subject=PHP&web=...`) and a form with `method="GET"` (which PHP automatically appends as a query string to the action URL) — meaning `$_GET` doesn't distinguish whether the data came from a link or a form submission. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`$_GET`** — array of variables from the HTTP GET method. [S1]
+- **Two GET data sources** — URL query strings (`?key=value&key2=value2`) and HTML forms with `method="get"`. [S1]
+- **GET forms append to the URL** — submitting a GET form results in `action_page.php?field1=value1&field2=value2` visible in the address bar. [S1]
+- **Security reminder** — always sanitize with `htmlspecialchars()`; proper validation belongs in the Form Validation chapter. [S1]
+
+## 📖 세부 내용 (Details)
+- Query string link: `<a href="demo_phpfile.php?subject=PHP&web=W3schools.com">Test $GET</a>` → `$subject = htmlspecialchars($_GET['subject']); $web = htmlspecialchars($_GET['web']);`. [S1]
+- GET form: `<form action="welcome_get.php" method="GET"> Name: <input type="text" name="name"> E-mail: <input type="text" name="email"> <input type="submit"> </form>` → submitted URL becomes `welcome_get.php?name=John&email=john@example.com`. [S1]
+- Retrieval: `Welcome <?php echo htmlspecialchars($_GET["name"]); ?><br> Your email address is: <?php echo htmlspecialchars($_GET["email"]); ?>`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 사용자 이름/이메일을 GET 폼으로 제출받아 인사말을 출력하는 것이 대표 실전 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Reading query string data via $_GET (PHP):
+```php
+$subject = htmlspecialchars($_GET['subject']);
+$web = htmlspecialchars($_GET['web']);
+echo "Study $subject at $web.";
+```
+
+## ✅ 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 Superglobals Post]], [[PHP RegEx]], [[PHP Form Validation]]
+- **참조 맥락:** 슈퍼글로벌 섹션의 마지막 — 정규표현식(RegEx) 섹션으로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — PHP $_GET Superglobal — https://www.w3schools.com/php/php_superglobals_get.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "PHP $_GET Superglobal" page (Astra wiki-curation, P-Reinforce v3.1 format).