---
id: php-arrays-create
title: "PHP Arrays Create"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["array() vs []", "PHP 배열 생성"]
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", "arrays", "create"]
raw_sources: ["https://www.w3schools.com/php/php_arrays_create.asp"]
applied_in: []
github_commit: ""
---

# [[PHP Arrays Create]]

## 🎯 한 줄 통찰 (One-line insight)
Indexed and associative arrays are structurally IDENTICAL under the hood — an indexed array is just an associative array whose keys happen to be auto-assigned sequential integers (`0 => "Volvo", 1 => "BMW"`), and you can even mix numeric and named keys freely in the same array, since PHP doesn't enforce a hard boundary between the two "types." [S1]

## 🧠 핵심 개념 (Core concepts)
- **`array()`** vs **`[]`** — functionally identical; brackets are the shorter modern syntax. [S1]
- **Multi-line declarations** — line breaks don't matter inside an array literal. [S1]
- **Trailing comma** — allowed after the last item. [S1]
- **Auto-assigned indices** — indexed arrays are secretly `0 => val, 1 => val, ...` associative arrays. [S1]
- **Empty array + incremental fill** — `$cars = []; $cars[0] = "Volvo"; ...`. [S1]
- **Mixed keys** — an array can combine numeric indices and named keys simultaneously. [S1]

## 📖 세부 내용 (Details)
- Shorthand brackets: `$cars = ["Volvo", "BMW", "Toyota"];`. [S1]
- Explicit index-key equivalence: `$cars = [0 => "Volvo", 1 => "BMW", 2 =>"Toyota"];` — same as auto-indexed. [S1]
- Empty then fill (indexed): `$cars = []; $cars[0] = "Volvo"; $cars[1] = "BMW"; $cars[2] = "Toyota";`. [S1]
- Empty then fill (associative): `$myCar = []; $myCar["brand"] = "Ford"; $myCar["model"] = "Mustang";`. [S1]
- Mixed keys: `$myArr = []; $myArr[0] = "apples"; $myArr[1] = "bananas"; $myArr["fruit"] = "cherries";`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **인덱스 배열과 연관 배열의 구조적 동일성**: 인덱스 배열은 사실 숫자 키(0, 1, 2...)를 자동 할당받은 연관 배열일 뿐이라는 점이 예제로 직접 증명됨. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 숫자 인덱스와 명명된 키를 한 배열에 혼용하는 패턴이 유연한 데이터 구조 설계의 실전 사례다. [S1]

## 💻 코드 패턴 (Code patterns)
Mixed numeric and named keys in one array (PHP):
```php
$myArr = [];
$myArr[0] = "apples";
$myArr[1] = "bananas";
$myArr["fruit"] = "cherries";
```

## ✅ 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 Arrays Indexed]], [[PHP Arrays Associative]], [[PHP Arrays Access]]
- **참조 맥락:** 배열 생성 문법 — 배열 접근(Access) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — PHP Create Arrays — https://www.w3schools.com/php/php_arrays_create.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "PHP Create Arrays" page (Astra wiki-curation, P-Reinforce v3.1 format).
