2nd/10_Wiki/Dev/Topic_PHP/PHP_Forms.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
php-forms	PHP Forms	Programming_Language	draft	conceptual		GET vs POST PHP 폼 처리		B	0.9	2026-07-04	2026-07-04			php programming w3schools forms get post	https://www.w3schools.com/php/php_forms.asp

PHP Forms

🎯 한 줄 통찰 (One-line insight)

GET data is visible in the URL and bookmarkable, but capped at ~2000 characters and NEVER safe for passwords — while POST data is invisible in the URL (no bookmarking) but has no size limit and supports file uploads — meaning the "developer preference for POST" isn't arbitrary, it directly follows from these visibility/size/capability trade-offs. [S1]

🧠 핵심 개념 (Core concepts)

• $_GET / $_POST — superglobal arrays collecting form data by the name attribute as key. [S1]
• GET — data visible in URL; ~2000 character limit; bookmarkable; NEVER use for passwords/sensitive data. [S1]
• POST — data invisible (embedded in request body); no size limit; supports file uploads (multi-part binary). [S1]
• No validation shown yet — this chapter demonstrates the mechanics only; security/validation comes in later chapters. [S1]

📖 세부 내용 (Details)

• POST form: <form action="welcome.php" method="post"> Name: <input type="text" name="name"><br> .... [S1]
• Retrieval: echo $_POST["name"]; echo $_POST["email"];. [S1]
• GET form equivalent: <form action="welcome_get.php" method="get"> ... retrieved via $_GET["name"]. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• GET의 보안 경고: 비밀번호 등 민감한 정보는 절대 GET으로 전송해서는 안 된다는 점이 강하게 경고됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이 챕터의 예제는 검증 없는 기초 폼 처리이며, 다음 챕터부터 보안을 고려한 검증이 다뤄진다. [S1]

💻 코드 패턴 (Code patterns)

Basic POST form and retrieval (PHP/HTML):

<form action="welcome.php" method="post">
    Name: <input type="text" name="name"><br>
    <input type="submit">
</form>

echo $_POST["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 Get, PHP Superglobals Post, PHP Form Validation
• 참조 맥락: 폼 처리의 기초 — 보안을 고려한 폼 검증(Form Validation) 챕터로 직접 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP Form Handling — https://www.w3schools.com/php/php_forms.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "PHP Form Handling" page (Astra wiki-curation, P-Reinforce v3.1 format).