2nd/10_Wiki/Dev/Topic_PHP/PHP_Looping_While.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-looping-while	PHP Looping While	Programming_Language	draft	conceptual		while loop endwhile PHP while 반복문		B	0.9	2026-07-04	2026-07-04			php programming w3schools loops while	https://www.w3schools.com/php/php_looping_while.asp

PHP Looping While

🎯 한 줄 통찰 (One-line insight)

PHP's while loop supports an alternative colon-based syntax (while ($i < 6): ... endwhile;) purely for template/HTML-embedding contexts — functionally identical to the brace syntax, but this "alt syntax" pattern (also seen in if/foreach) exists specifically because it reads more cleanly when PHP is interleaved with HTML markup. [S1]

🧠 핵심 개념 (Core concepts)

• while (condition) { ... } — condition checked BEFORE each iteration; false-from-start means zero executions. [S1]
• break — exits the loop early even if the condition is still true. [S1]
• continue — skips the rest of the current iteration, proceeds to the next condition check. [S1]
• Alternative syntax — while (condition): ... endwhile; — same behavior, colon-based. [S1]
• Custom step size — incrementing by more than 1 per iteration (e.g. $i += 10). [S1]

📖 세부 내용 (Details)

• Basic loop: $i = 1; while ($i < 6) { echo $i; $i++; }. [S1]
• Break: $i = 1; while ($i < 6) { if ($i == 3) break; echo $i; $i++; }. [S1]
• Continue: $i = 0; while ($i < 6) { $i++; if ($i == 3) continue; echo $i; }. [S1]
• Alt syntax: $i = 1; while ($i < 6): echo $i; $i++; endwhile;. [S1]
• Step-10 counting: $i = 0; while ($i < 100) { $i += 10; echo $i . "<br>"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 카운터를 10씩 증가시켜 100까지 세는 예제가 스텝 크기 조정의 대표 패턴이다. [S1]

💻 코드 패턴 (Code patterns)

While loop with alternative colon syntax (PHP):

$i = 1;
while ($i < 6):
    echo $i;
    $i++;
endwhile;

✅ 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 Looping, PHP Looping Do While, PHP Looping Break, PHP Looping Continue
• 참조 맥락: 조건 기반 반복의 기본형 — do-while과의 실행 시점 차이가 다음 챕터의 핵심.

📚 출처 (Sources)

• [S1] W3Schools — PHP while Loop — https://www.w3schools.com/php/php_looping_while.asp

📝 변경 이력 (Change history)

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