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

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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-arrays-associative	PHP Arrays Associative	Programming_Language	draft	conceptual		associative arrays PHP 연관 배열		B	0.9	2026-07-04	2026-07-04			php programming w3schools arrays associative	https://www.w3schools.com/php/php_arrays_associative.asp

PHP Arrays Associative

🎯 한 줄 통찰 (One-line insight)

The foreach ($car as $key => $value) two-variable form is what makes associative arrays actually useful in loops — without capturing the key, you'd only get the values back with no way to know which named field each one came from, unlike indexed arrays where position alone is often sufficient context. [S1]

🧠 핵심 개념 (Core concepts)

• Associative array — uses named keys ("brand" => "Ford") instead of numeric indices. [S1]
• => operator — separates key from value in array literals. [S1]
• Access/update by key name — $car["model"] reads or writes via the key. [S1]
• foreach ($arr as $key => $value) — the two-variable loop form, exposing both key and value per iteration. [S1]

📖 세부 내용 (Details)

• Create: $car = array("brand"=>"Ford", "model"=>"Mustang", "year"=>1964);. [S1]
• Access: echo $car["model"]; // "Mustang". [S1]
• Update: $car["year"] = 2024;. [S1]
• Loop with key+value: foreach ($car as $x => $y) { echo "$x: $y <br>"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 자동차의 브랜드/모델/연도처럼 명명된 속성 집합을 표현하는 것이 연관 배열의 대표 활용이다. [S1]

💻 코드 패턴 (Code patterns)

Looping with key and value together (PHP):

$car = array("brand"=>"Ford", "model"=>"Mustang", "year"=>1964);
foreach ($car as $x => $y) {
    echo "$x: $y <br>";
}

✅ 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 Arrays Indexed, PHP Arrays Create, PHP Looping Foreach
• 참조 맥락: 명명된 키 기반 배열 — 배열 생성(Create) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP Associative Arrays — https://www.w3schools.com/php/php_arrays_associative.asp

📝 변경 이력 (Change history)

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