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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

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title

PHP AJAX PHP

🎯 한 줄 통찰 (One-line insight)

The classic autocomplete pattern splits work cleanly across the stack — JavaScript's onkeyup fires on every keystroke and sends the partial text via XMLHttpRequest to a PHP endpoint, while PHP does the actual matching against its name array and returns plain text that JavaScript drops straight into the DOM — meaning the PHP side never touches the DOM and the JS side never touches the data logic. [S1]

🧠 핵심 개념 (Core concepts)

onkeyup event — triggers the JavaScript function on every keystroke, enabling real-time feedback. [S1]
XMLHttpRequest — the JS object used to send the async GET request. [S1]
onreadystatechange — a callback fired when the request's state changes; checks readyState == 4 (done) and status == 200 (success) before using the response. [S1]
Query string parameter passing — the input's current value is appended to the request URL (gethint.php?q=" + str). [S1]
PHP-side matching — $_REQUEST["q"] retrieves the query string; stristr() performs a case-insensitive substring search against a hardcoded name array. [S1]
Plain-text response — the PHP script just echos the matched name(s); no JSON/XML wrapping needed for this simple case. [S1]

📖 세부 내용 (Details)

JS trigger: <input type="text" id="fname" name="fname" onkeyup="showHint(this.value)">. [S1]
Async request: var xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { document.getElementById("txtHint").innerHTML = this.responseText; } }; xmlhttp.open("GET", "gethint.php?q=" + str, true); xmlhttp.send();. [S1]
PHP matching: $q = $_REQUEST["q"]; if ($q !== "") { $q = strtolower($q); $len=strlen($q); foreach($a as $name) { if (stristr($q, substr($name, 0, $len))) { ... } } } echo $hint === "" ? "no suggestion" : $hint;. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이름 자동완성(입력 시 실시간 제안 표시)이 AJAX+PHP 연동의 대표 실전 사례다. [S1]

💻 코드 패턴 (Code patterns)

PHP-side substring matching against user input (PHP):

$q = $_REQUEST["q"];
$hint = "";
if ($q !== "") {
    $q = strtolower($q);
    $len = strlen($q);
    foreach ($a as $name) {
        if (stristr($q, substr($name, 0, $len))) {
            $hint = ($hint === "") ? $name : $hint . ", $name";
        }
    }
}
echo $hint === "" ? "no suggestion" : $hint;

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.88
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: PHP Tutorial
관련 개념: PHP AJAX Intro, PHP AJAX Database, PHP Superglobals Request
참조 맥락: JS-PHP 데이터 교환 기초 — 데이터베이스 연동(AJAX Database) 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — PHP - AJAX and PHP — https://www.w3schools.com/php/php_ajax_php.asp

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "PHP - AJAX and PHP" page (Astra wiki-curation, P-Reinforce v3.1 format).

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