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.
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+---
+id: php-superglobals-post
+title: "PHP Superglobals Post"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["$_POST", "PHP POST 슈퍼글로벌"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["php", "programming", "w3schools", "superglobals", "post", "forms"]
+raw_sources: ["https://www.w3schools.com/php/php_superglobals_post.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[PHP Superglobals Post]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The form's `name` attribute (not `id`) is what becomes the `$_POST` array key — a common beginner confusion, since HTML's `id` attribute serves CSS/JS targeting while `name` is the exclusive mechanism PHP uses to receive submitted field data. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`$_POST`** — array of variables from HTTP POST-method requests. [S1]
+- **Trigger condition** — the HTML `<form>`'s `method` attribute must be `"post"`. [S1]
+- **Key source** — the input field's `name` attribute becomes the `$_POST` array key. [S1]
+- **Self-submitting form pattern** — `action="<?php echo $_SERVER['PHP_SELF'];?>"` posts back to the same file. [S1]
+- **Sanitization** — `htmlspecialchars()` before echoing user input, to prevent XSS. [S1]
+
+## 📖 세부 내용 (Details)
+- HTML form: `<form method="post" action="demo_request.php"> Name: <input type="text" name="fname"> <input type="submit"> </form>`. [S1]
+- PHP retrieval: `$name = htmlspecialchars($_POST['fname']); echo $name;`. [S1]
+- Combined self-submitting form: `<form method="POST" action="<?php echo $_SERVER['PHP_SELF'];?>"> ... <?php if ($_SERVER["REQUEST_METHOD"] == "POST") { $name = htmlspecialchars($_POST['fname']); ... } ?>`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — HTML 폼과 PHP 처리 코드를 같은 파일에 두는 자기 제출(self-submitting) 패턴이 실전에서 자주 쓰인다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Self-submitting form with $_POST (PHP):
+```php
+<form method="POST" action="<?php echo $_SERVER['PHP_SELF'];?>">
+    Name: <input type="text" name="fname">
+    <input type="submit">
+</form>
+<?php
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $name = htmlspecialchars($_POST['fname']);
+    echo empty($name) ? "Name is empty" : $name;
+}
+?>
+```
+
+## ✅ 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 Request]], [[PHP Superglobals Get]], [[PHP Forms]]
+- **참조 맥락:** POST 방식 폼 데이터 처리 — $_GET 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — PHP $_POST Superglobal — https://www.w3schools.com/php/php_superglobals_post.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "PHP $_POST Superglobal" page (Astra wiki-curation, P-Reinforce v3.1 format).