2nd/10_Wiki/Dev/Topic_PHP/PHP_Echo_Print.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-echo-print	PHP Echo Print	Programming_Language	draft	conceptual		echo vs print PHP 출력		B	0.9	2026-07-04	2026-07-04			php programming w3schools echo print	https://www.w3schools.com/php/php_echo_print.asp

PHP Echo Print

🎯 한 줄 통찰 (One-line insight)

print returns 1 (usable inside expressions) while echo returns nothing at all — this is the functional difference behind an otherwise near-identical pair of output statements, alongside echo accepting multiple comma-separated arguments where print accepts exactly one. [S1]

🧠 핵심 개념 (Core concepts)

• echo — no return value; accepts multiple parameters; marginally faster than print. [S1]
• print — returns 1 (usable in expressions); accepts only one argument. [S1]
• Both optional-parens — echo "x"; / echo("x"); and print "x"; / print("x"); are equivalent. [S1]
• Double vs. single quotes — double quotes allow direct variable interpolation ("$txt"); single quotes require concatenation ('...' . $txt . '...'). [S1]

📖 세부 내용 (Details)

• echo with multiple params: echo "This ", "string ", "was ", "made ", "with multiple parameters.";. [S1]
• Double-quote interpolation: echo "<h2>$txt1</h2>";. [S1]
• Single-quote concatenation: echo '<h2>' . $txt1 . '</h2>';. [S1]
• print (single arg only): print "Hello world!<br>";. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 반환값 차이: echo는 반환값이 없고, print는 1을 반환하여 표현식 내에서 사용 가능하다는 점이 핵심 차이로 명시됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 여러 문자열을 콤마로 나열해 한 번에 출력하는 echo의 다중 인자 기능이 실전에서 자주 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

echo with multiple comma-separated arguments (PHP):

echo "This ", "string ", "was ", "made ", "with multiple parameters.";

✅ 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 Variables, PHP Data Types, PHP String Concatenate
• 참조 맥락: 출력의 두 가지 방법 — 데이터 타입(Data Types) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP echo and print Functions — https://www.w3schools.com/php/php_echo_print.asp

📝 변경 이력 (Change history)

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