Antigravity Agent
1cfd3bbb56
Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
75 lines
3.7 KiB
Markdown
75 lines
3.7 KiB
Markdown
---
|
|
id: php-match
|
|
title: "PHP Match"
|
|
category: "Programming_Language"
|
|
status: "draft"
|
|
verification_status: "conceptual"
|
|
canonical_id: ""
|
|
aliases: ["match expression", "PHP match"]
|
|
duplicate_of: ""
|
|
source_trust_level: "B"
|
|
confidence_score: 0.9
|
|
created_at: 2026-07-04
|
|
updated_at: 2026-07-04
|
|
review_reason: ""
|
|
merge_history: []
|
|
tags: ["php", "programming", "w3schools", "match", "php8"]
|
|
raw_sources: ["https://www.w3schools.com/php/php_match.asp"]
|
|
applied_in: []
|
|
github_commit: ""
|
|
---
|
|
|
|
# [[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+):
|
|
```php
|
|
$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).
|