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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-match PHP Match Programming_Language draft conceptual
match expression
PHP match
B 0.9 2026-07-04 2026-07-04
php
programming
w3schools
match
php8
https://www.w3schools.com/php/php_match.asp

PHP Match

🎯 한 줄 통찰 (One-line insight)

match (PHP 8.0+) uses STRICT comparison (===) internally while switch uses loose comparison (==) — this means match won't accidentally match a string "1" against an int 1 the way switch might, making match both safer and more predictable, on top of returning a value and auto-breaking after any match. [S1]

🧠 핵심 개념 (Core concepts)

  • match (PHP 8.0+) — evaluates an expression against alternatives using strict (===) comparison, returns a value. [S1]
  • Four key differences from switch — more readable syntax; returns a value (switch doesn't); auto-breaks after a match (switch needs explicit break); strict comparison (switch uses loose ==). [S1]
  • Syntax$result = match($expr) { cond1 => val1, cond2, cond3 => val2, default => defaultVal };. [S1]
  • Multiple conditions per arm — comma-separated conditions sharing one result. [S1]
  • UnhandledMatchError — thrown if no condition matches AND there's no default arm. [S1]

📖 세부 내용 (Details)

  • Basic match (equivalent to the switch example): $favcolor = "red"; $text = match($favcolor) { "red" => "Your favorite color is red!", "blue" => "...", "green" => "...", default => "..." }; echo $text;. [S1]
  • Multiple values per arm: $text = match($d) { 1, 2, 3, 4, 5 => "The week feels so long!", 6, 0 => "Weekends are best!", default => "Invalid day" };. [S1]
  • No match, no default → exception: $favcolor = "pink"; try { $text = match($favcolor) { "red" => ..., "blue" => ..., "green" => ... }; } catch (\UnhandledMatchError $e) { var_dump($e); }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

  • match와 switch의 근본적 차이 4가지: 값 반환 여부, 자동 break 여부, 엄격 비교(===) vs 느슨한 비교(==)가 명확히 구분됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 값이 없을 때 UnhandledMatchError를 try-catch로 처리하는 패턴이 견고한 매치 로직의 실전 예시다. [S1]

💻 코드 패턴 (Code patterns)

Match expression with strict comparison and value return (PHP 8+):

$favcolor = "red";
$text = match($favcolor) {
    "red" => "Your favorite color is red!",
    "blue" => "Your favorite color is blue!",
    "green" => "Your favorite color is green!",
    default => "Your favorite color is neither red, blue, nor green!",
};
echo $text;

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)

📚 출처 (Sources)

📝 변경 이력 (Change history)

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