---
id: php-arrays-add
title: "PHP Arrays Add"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["array_push", "array_unshift", "array_merge", "PHP 배열 추가"]
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", "add"]
raw_sources: ["https://www.w3schools.com/php/php_arrays_add.asp"]
applied_in: []
github_commit: ""
---

# [[PHP Arrays Add]]

## 🎯 한 줄 통찰 (One-line insight)
Adding multiple items to an associative array requires the `+=` operator instead of `array_push()` — `array_push()` only works with numeric-indexed arrays, so associative arrays need their own dedicated pattern (`$cars += ["color" => "red", "year" => 1964];`) to bulk-add named key-value pairs. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`[]` bracket append** — `$fruits[] = "Orange";` adds a single item to the end. [S1]
- **`array_push($arr, ...)`** — adds one or more items to the end (indexed arrays). [S1]
- **`+=` for associative bulk-add** — merges new key-value pairs into an associative array. [S1]
- **`array_unshift($arr, ...)`** — adds one or more items to the BEGINNING. [S1]
- **`array_splice($arr, offset, 0, item)`** — inserting with a length of 0 means nothing is removed, only inserted. [S1]
- **`array_merge($arr1, $arr2, ...)`** — combines two or more arrays into one. [S1]

## 📖 세부 내용 (Details)
- Single append: `$fruits = array("Apple", "Banana", "Cherry"); $fruits[] = "Orange";`. [S1]
- Associative single-add: `$cars = array("brand" => "Ford", "model" => "Mustang"); $cars["color"] = "Red";`. [S1]
- array_push (multiple, indexed): `array_push($fruits, "Orange", "Kiwi", "Lemon");`. [S1]
- Associative bulk-add: `$cars += ["color" => "red", "year" => 1964];`. [S1]
- array_unshift (prepend multiple): `array_unshift($fruits, "Orange", "Kiwi", "Lemon");`. [S1]
- array_splice insert-only: `array_splice($fruits, 1, 0, "Orange"); // inserts at index 1, removes nothing`. [S1]
- array_merge: `$result = array_merge($fruits1, $fruits2);`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **연관 배열 다중 추가의 특수성**: array_push()는 인덱스 배열용이므로 연관 배열에 여러 키-값 쌍을 한 번에 추가하려면 += 연산자를 써야 한다는 점이 구분됨. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — array_splice()로 특정 위치에 항목을 삽입하는 것이 배열 중간 삽입의 표준 패턴이다. [S1]

## 💻 코드 패턴 (Code patterns)
Bulk-adding key-value pairs to an associative array (PHP):
```php
$cars = array("brand" => "Ford", "model" => "Mustang");
$cars += ["color" => "red", "year" => 1964];
```

## ✅ 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 Update]], [[PHP Arrays Remove]], [[PHP Arrays Functions]]
- **참조 맥락:** 배열 항목 추가 방법 — 항목 삭제(Remove) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — PHP Add Array Items — https://www.w3schools.com/php/php_arrays_add.asp

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