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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

2026-07-05 00:39:13 +09:00

3.6 KiB

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title

PHP File Open

🎯 한 줄 통찰 (One-line insight)

feof() is specifically designed for looping through data of UNKNOWN length — rather than counting lines in advance, while(!feof($myfile)) { echo fgets($myfile); } keeps reading exactly until the end-of-file marker is hit, making it the correct pattern for files whose size isn't known ahead of time. [S1]

🧠 핵심 개념 (Core concepts)

fopen(filename, mode) — opens a file; modes: r (read), r+ (read/write, preserves data), w (write, erases existing), w+ (read/write, erases), a (append), a+ (append read/write), x (create-only, fails if exists), x+ (create-only read/write). [S1]
fread($file, length) — reads up to length bytes; filesize() reads the whole file. [S1]
fclose($file) — closes an open file; good practice to always close after use to free server resources. [S1]
fgets($file) — reads one line; advances the file pointer to the next line after each call. [S1]
feof($file) — checks for end-of-file; useful for looping over data of unknown length. [S1]
fgetc($file) — reads one character; advances the pointer to the next character. [S1]

📖 세부 내용 (Details)

Open + read whole file: $myfile = fopen("webdictionary.txt", "r") or die("Error: Unable to open file!"); echo fread($myfile, filesize("webdictionary.txt")); fclose($myfile);. [S1]
Read one line: $myfile = fopen("webdictionary.txt", "r") or die(...); echo fgets($myfile); fclose($myfile);. [S1]
Loop until EOF (line by line): while(!feof($myfile)) { echo fgets($myfile) . "<br>"; }. [S1]
Loop until EOF (char by char): while(!feof($myfile)) { echo fgetc($myfile); }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — feof()로 파일 끝까지 한 줄씩 읽어 출력하는 것이 알 수 없는 길이의 파일 처리 표준 패턴이다. [S1]

💻 코드 패턴 (Code patterns)

Reading a file line by line until EOF (PHP):

$myfile = fopen("webdictionary.txt", "r") or die("Unable to open file!");
while (!feof($myfile)) {
    echo fgets($myfile) . "<br>";
}
fclose($myfile);

✅ 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 File, PHP File Create
참조 맥락: 파일 열기/읽기/닫기 — 파일 생성/쓰기(File Create) 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — PHP File Open/Read/Close — https://www.w3schools.com/php/php_file_open.asp

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "PHP File Open/Read/Close" page (Astra wiki-curation, P-Reinforce v3.1 format).

3.6 KiB Raw Blame History