Files

T

Antigravity Agent 1cfd3bbb56 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.

2026-07-05 00:10:59 +09:00

3.7 KiB

Raw Blame History

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

title

PHP Cookies

🎯 한 줄 통찰 (One-line insight)

setcookie() MUST run before any HTML output, including before the <html> tag — this is a hard requirement (not a style preference) because cookies are transmitted as part of the HTTP header, which must be sent before the response body; this is the same constraint sessions have. [S1]

🧠 핵심 개념 (Core concepts)

Cookie — a small text file the server stores in the browser, resent with every subsequent HTTP request. [S1]
setcookie(name, value, expire, path, domain, secure, httponly) — only name is required; all others optional. [S1]
Must precede any output — setcookie() must be called before <html> or any other output, since cookies are part of the HTTP header. [S1]
$_COOKIE — superglobal for reading cookie values. [S1]
Deleting a cookie — call setcookie() again with an expiration time in the PAST. [S1]
Auto URL-encoding — cookie values are automatically URL-encoded on send and decoded on receipt (use setrawcookie() to opt out). [S1]

📖 세부 내용 (Details)

Create + retrieve: setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); ... if(isset($_COOKIE[$cookie_name])) { echo $_COOKIE[$cookie_name]; }. [S1]
Modify: re-calling setcookie() with a new value overwrites the old one. [S1]
Delete: setcookie("username", "", time() - 3600); // expiration in the past. [S1]
Check if cookies enabled: setcookie("test_cookie", "test", time() + 3600, '/'); ... if(count($_COOKIE) > 0) { echo "Cookies are enabled."; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

출력 전 호출 필수: setcookie()는 HTTP 헤더의 일부이므로 반드시 <html> 태그를 포함한 어떤 출력보다도 먼저 호출되어야 한다는 점이 두 번 강조됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 30일 만료 쿠키로 사용자 이름을 저장하는 것이 로그인 상태 유지의 대표 실전 사례다. [S1]

💻 코드 패턴 (Code patterns)

Creating and checking a cookie (PHP):

<?php
$cookie_name = "username";
$cookie_value = "John Doe";
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // must run before <html>
?>
<html>
<body>
<?php
if (isset($_COOKIE[$cookie_name])) {
    echo "Value is: " . $_COOKIE[$cookie_name];
}
?>
</body>
</html>

✅ 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 File Upload, PHP Sessions, PHP Superglobals
참조 맥락: 클라이언트 측 데이터 저장 — 세션(Sessions) 챕터로 직접 이어짐.

📚 출처 (Sources)

[S1] W3Schools — PHP Cookies — https://www.w3schools.com/php/php_cookies.asp

📝 변경 이력 (Change history)

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

3.7 KiB Raw Blame History