e9cbf23ab5
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3.9 KiB
3.9 KiB
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-date | PHP Date | Programming_Language | draft | conceptual |
|
B | 0.9 | 2026-07-04 | 2026-07-04 |
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PHP Date
🎯 한 줄 통찰 (One-line insight)
strtotime() accepts natural-language relative expressions like "+2 weeks 4 days 2 hours 20 seconds" or "last Sunday" and correctly parses them into Unix timestamps — but the source explicitly warns it "is not perfect," meaning arbitrary human phrasing should always be verified rather than trusted blindly. [S1]
🧠 핵심 개념 (Core concepts)
date(format, timestamp)— formats a timestamp (or "now" if omitted) into a readable string. [S1]- Format characters —
d/j(day),m(month, 2-digit),Y(year, 4-digit),l(weekday name),F(month name),H/h(24/12-hour),i(minutes),s(seconds),a(am/pm). [S1] date_default_timezone_set()/_get()— sets/reads the timezone used by all date/time functions in the script. [S1]mktime(hour, minute, second, month, day, year)— returns the Unix timestamp for a specific date/time. [S1]time()— current time as a Unix timestamp. [S1]strtotime(datetime_string, basetimestamp)— parses an English textual date/time description into a Unix timestamp; supports relative expressions. [S1]
📖 세부 내용 (Details)
- Multiple date formats:
echo date("Y/m/d"); echo date("Y.m.d"); echo date("Y-m-d"); echo date("l"); echo date('l, F j, Y');. [S1] - Automatic copyright year:
© 2010-<?php echo date("Y");?>. [S1] - Timezone-aware:
date_default_timezone_set("America/New_York"); echo date("Y-m-d H:i:s");. [S1] - mktime for a specific historical date:
date_default_timezone_set("UTC"); $d = mktime(0, 0, 0, 10, 3, 1975); echo "October 3, 1975 was on a " . date("l", $d);. [S1] - Relative date parsing:
$d = strtotime("+2 weeks 4 days 2 hours 20 seconds"); echo date("Y-m-d H:i:s", $d);. [S1] - Iterative date generation (next 6 Saturdays):
$startdate = strtotime("Saturday"); $enddate = strtotime("+6 weeks", $startdate); while ($startdate < $enddate) { echo date("M d", $startdate) . "<br>"; $startdate = strtotime("+1 week", $startdate); }. [S1]
⚖️ 모순 및 업데이트 (Contradictions & updates)
- strtotime()의 불완전성 경고: 자연어 날짜 문자열 파싱이 완벽하지 않으므로 입력 문자열을 항상 검증해야 한다는 팁이 명시됨. [S1]
🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 저작권 연도를 date("Y")로 자동 갱신하는 것이 웹사이트 실전 적용의 대표 사례다. [S1]
💻 코드 패턴 (Code patterns)
Relative date parsing with strtotime() (PHP):
$d = strtotime("+2 weeks 4 days 2 hours 20 seconds");
echo "Date is " . date("Y-m-d H:i:s", $d);
✅ 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 Form Complete, PHP Includes
- 참조 맥락: 날짜/시간 처리 — 파일 포함(Includes) 챕터로 이어짐.
📚 출처 (Sources)
- [S1] W3Schools — PHP Date and Time — https://www.w3schools.com/php/php_date.asp
📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "PHP Date and Time" page (Astra wiki-curation, P-Reinforce v3.1 format).