2nd/10_Wiki/Dev/Topic_PHP/PHP_Math.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-math	PHP Math	Programming_Language	draft	conceptual		PHP 수학 함수		B	0.9	2026-07-04	2026-07-04			php programming w3schools math	https://www.w3schools.com/php/php_math.asp

PHP Math

🎯 한 줄 통찰 (One-line insight)

rand() accepts optional min/max parameters that fundamentally change its behavior — bare rand() returns an arbitrary-range random number, while rand(10, 100) constrains the result to an inclusive range, making the two-argument form the one actually usable for bounded scenarios like dice rolls or ID generation. [S1]

🧠 핵심 개념 (Core concepts)

• pi() — returns the value of π. [S1]
• min() / max() — lowest/highest value among a list of arguments. [S1]
• abs() — absolute (positive) value. [S1]
• sqrt() — square root. [S1]
• round() — rounds a float to the nearest integer. [S1]
• rand() — random number; optional (min, max) params bound the range (inclusive). [S1]

📖 세부 내용 (Details)

• Pi: echo(pi());. [S1]
• Min/max: echo(min(0, 150, -8, -200)); echo(max(0, 150, -8, -200));. [S1]
• Absolute value: echo(abs(-6.7)); // 6.7. [S1]
• Square root: echo(sqrt(64)); // 8. [S1]
• Rounding: echo(round(3.60)); echo(round(0.49));. [S1]
• Bounded random: echo(rand(10, 100)); // between 10 and 100 inclusive. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — rand(10, 100)처럼 범위 지정 난수 생성이 게임/추첨 등 실전에서 자주 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

Bounded random integer (PHP):

echo(rand(10, 100)); // random integer between 10 and 100 inclusive

✅ 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 Numbers, PHP Casting, PHP Constants
• 참조 맥락: 수학 함수 모음 — 상수(Constants) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP Math Functions — https://www.w3schools.com/php/php_math.asp

📝 변경 이력 (Change history)

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