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3.7 KiB
3.7 KiB
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-match | PHP Match | Programming_Language | draft | conceptual |
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B | 0.9 | 2026-07-04 | 2026-07-04 |
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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 nodefaultarm. [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)
- 상위/루트: PHP Tutorial
- 관련 개념: PHP Switch, PHP Exceptions, PHP Looping
- 참조 맥락: switch의 PHP 8 대안 — 반복문(Looping) 섹션으로 이어짐.
📚 출처 (Sources)
- [S1] W3Schools — PHP match Expression — https://www.w3schools.com/php/php_match.asp
📝 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).