2nd/10_Wiki/Dev/Topic_PHP/PHP_XML_SimpleXML_Get.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-xml-simplexml-get	PHP XML SimpleXML Get	Programming_Language	draft	conceptual		SimpleXML node values SimpleXML attributes PHP SimpleXML 값 조회		B	0.9	2026-07-04	2026-07-04			php programming w3schools xml simplexml	https://www.w3schools.com/php/php_xml_simplexml_get.asp

PHP XML SimpleXML Get

🎯 한 줄 통찰 (One-line insight)

SimpleXML lets you access node VALUES with ->propertyName syntax and ATTRIBUTES with ['attrName'] array-bracket syntax on the SAME object — $xml->book[0]->title reads a nested element, while $xml->book[0]['category'] reads that same book's attribute, meaning the choice of -> vs [] distinguishes elements from attributes throughout SimpleXML. [S1]

🧠 핵심 개념 (Core concepts)

• ->propertyName — reads a child element's value (e.g., $xml->to). [S1]
• [] on an element or the root — array-indexes into repeated sibling elements (e.g., $xml->book[0], $xml->book[1]). [S1]
• ['attrName'] — reads an XML attribute's value (distinct from -> for elements). [S1]
• $xml->children() — used inside foreach to loop through all repeated child elements. [S1]

📖 세부 내용 (Details)

• Basic node value access: $xml = simplexml_load_file("note.xml"); echo $xml->to . "<br>"; echo $xml->from . "<br>";. [S1]
• Indexed access into repeated elements: echo $xml->book[0]->title . "<br>"; echo $xml->book[1]->title;. [S1]
• Looping all books: foreach($xml->children() as $books) { echo $books->title . ", "; echo $books->author . ", "; echo $books->year . ", "; echo $books->price . "<br>"; }. [S1]
• Attribute access: echo $xml->book[0]['category'] . "<br>"; echo $xml->book[1]->title['lang'];. [S1]
• Looping attributes: foreach($xml->children() as $books) { echo $books->title['lang']; echo "<br>"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — books.xml에서 여러 책의 제목/저자/연도/가격을 순회 출력하는 것이 SimpleXML 조회의 대표 실전 사례다. [S1]

💻 코드 패턴 (Code patterns)

Looping through repeated elements and their attributes (PHP):

$xml = simplexml_load_file("books.xml") or die("Error: Cannot create object");
foreach ($xml->children() as $books) {
    echo $books->title . ", " . $books->author . ", " . $books->year . ", " . $books->price . "<br>";
    echo $books->title['lang'] . "<br>"; // attribute of the title element
}

✅ 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 XML SimpleXML Read, PHP XML Parser Expat
• 참조 맥락: SimpleXML 노드/속성 조회 — Expat 이벤트 기반 파서 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP SimpleXML - Get Values — https://www.w3schools.com/php/php_xml_simplexml_get.asp

📝 변경 이력 (Change history)

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