mysqli_result :: fetch_column을 사용하여 데이터를 추출하고 외부 API와 결합하십시오.

gitbox 2025-08-22
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 이것은 기사의 내용과 관련이 없습니다.PHP코드 예제，데이터베이스 연결 및 간단한 쿼리를 보여줍니다</span></span><span>
</span><span><span class="hljs-variable">$mysqli</span></span><span> = </span><span><span class="hljs-keyword">new</span></span><span> </span><span><span class="hljs-title function_ invoke__">mysqli</span></span><span>(</span><span><span class="hljs-string">"localhost"</span></span><span>, </span><span><span class="hljs-string">"user"</span></span><span>, </span><span><span class="hljs-string">"password"</span></span><span>, </span><span><span class="hljs-string">"database"</span></span><span>);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;connect_errno) {
    </span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"연결이 실패했습니다: "</span></span><span> . </span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;connect_error);
}
</span><span><span class="hljs-variable">$query</span></span><span> = </span><span><span class="hljs-string">"SELECT id, name FROM users LIMIT 5"</span></span><span>;
</span><span><span class="hljs-variable">$result</span></span><span> = </span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">query</span></span><span>(</span><span><span class="hljs-variable">$query</span></span><span>);
</span><span><span class="hljs-meta">?&gt;</span></span><span>

&lt;hr&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
<span class="hljs-comment">/*
 * 사용 mysqli_result::fetch_column 데이터와 외부에서 추출하십시오 API 결합 된 처리
 *
 * 존재하다PHP가운데，mysqli확장은 작업입니다MySQL数据库的常사용방법之一。
 * ~에서PHP 8.1증가，mysqli_result새로운 카테고리가 추가되었습니다fetch_column방법，
 * 可以直接提取查询结果가운데的某一列，편리하고 빠릅니다。
 *
 * 本文将介绍如何使사용fetch_column단일 열 데이터를 추출하십시오，추출 된 데이터를 외부에 추가하십시오API결합 된 처리，
 * 例如调사용一个시뮬레이션的API，获取每个사용户的详细信息。
 */</span>

</span><span><span class="hljs-variable">$mysqli</span></span><span> = </span><span><span class="hljs-keyword">new</span></span><span> </span><span><span class="hljs-title function_ invoke__">mysqli</span></span><span>(</span><span><span class="hljs-string">"localhost"</span></span><span>, </span><span><span class="hljs-string">"user"</span></span><span>, </span><span><span class="hljs-string">"password"</span></span><span>, </span><span><span class="hljs-string">"database"</span></span><span>);
</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;connect_errno) {
    </span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"연결이 실패했습니다: "</span></span><span> . </span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;connect_error);
}

</span><span><span class="hljs-comment">// 查询사용户ID목록</span></span><span>
</span><span><span class="hljs-variable">$sql</span></span><span> = </span><span><span class="hljs-string">"SELECT id FROM users"</span></span><span>;
</span><span><span class="hljs-variable">$result</span></span><span> = </span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">query</span></span><span>(</span><span><span class="hljs-variable">$sql</span></span><span>);

</span><span><span class="hljs-keyword">if</span></span><span> (!</span><span><span class="hljs-variable">$result</span></span><span>) {
    </span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"쿼리가 실패했습니다: "</span></span><span> . </span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;error);
}

</span><span><span class="hljs-comment">// 使사용fetch_column提取所有사용户ID，배열로 돌아갑니다</span></span><span>
</span><span><span class="hljs-variable">$user_ids</span></span><span> = [];
</span><span><span class="hljs-keyword">while</span></span><span> (</span><span><span class="hljs-variable">$id</span></span><span> = </span><span><span class="hljs-variable">$result</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">fetch_column</span></span><span>(</span><span><span class="hljs-number">0</span></span><span>)) {  </span><span><span class="hljs-comment">// 매개 변수0첫 번째 열을 취하는 것을 나타냅니다</span></span><span>
    </span><span><span class="hljs-variable">$user_ids</span></span><span>[] = </span><span><span class="hljs-variable">$id</span></span><span>;
}

</span><span><span class="hljs-comment">// 쿼리 결과 세트를 닫습니다</span></span><span>
</span><span><span class="hljs-variable">$result</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">free</span></span><span>();

</span><span><span class="hljs-comment">// 시뮬레이션调사용外部API，根据사용户ID批量获取사용户信息</span></span><span>
</span><span><span class="hljs-comment">// 这里我们사용一个简单函数代替真实API调사용</span></span><span>
</span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">getUserInfoFromApi</span></span><span>(</span><span><span class="hljs-params"><span class="hljs-keyword">array</span></span></span><span> </span><span><span class="hljs-variable">$ids</span></span><span>): </span><span><span class="hljs-title">array</span></span><span> {
    </span><span><span class="hljs-variable">$data</span></span><span> = [];
    </span><span><span class="hljs-keyword">foreach</span></span><span> (</span><span><span class="hljs-variable">$ids</span></span><span> </span><span><span class="hljs-keyword">as</span></span><span> </span><span><span class="hljs-variable">$id</span></span><span>) {
        </span><span><span class="hljs-comment">// 시뮬레이션API데이터 구조를 반환하십시오</span></span><span>
        </span><span><span class="hljs-variable">$data</span></span><span>[</span><span><span class="hljs-variable">$id</span></span><span>] = [
            </span><span><span class="hljs-string">'id'</span></span><span> =&gt; </span><span><span class="hljs-variable">$id</span></span><span>,
            </span><span><span class="hljs-string">'name'</span></span><span> =&gt; </span><span><span class="hljs-string">"User_<span class="hljs-subst">$id</span></span></span><span>",
            </span><span><span class="hljs-string">'email'</span></span><span> =&gt; </span><span><span class="hljs-string">"user<span class="hljs-subst">{$id}</span></span></span><span>@example.com",
        ];
    }
    </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-variable">$data</span></span><span>;
}

</span><span><span class="hljs-comment">// 调사용API자세한 정보를 얻으십시오</span></span><span>
</span><span><span class="hljs-variable">$user_details</span></span><span> = </span><span><span class="hljs-title function_ invoke__">getUserInfoFromApi</span></span><span>(</span><span><span class="hljs-variable">$user_ids</span></span><span>);

</span><span><span class="hljs-comment">// 결과를 처리하고 출력합니다</span></span><span>
</span><span><span class="hljs-keyword">foreach</span></span><span> (</span><span><span class="hljs-variable">$user_details</span></span><span> </span><span><span class="hljs-keyword">as</span></span><span> </span><span><span class="hljs-variable">$user</span></span><span>) {
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"사용户ID: <span class="hljs-subst">{$user['id']}</span></span></span><span>&lt;br&gt;";
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"이름: <span class="hljs-subst">{$user['name']}</span></span></span><span>&lt;br&gt;";
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"우편: <span class="hljs-subst">{$user['email']}</span></span></span><span>&lt;br&gt;&lt;hr&gt;";
}

</span><span><span class="hljs-variable">$mysqli</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">close</span></span><span>();
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
관련 태그:
mysqli_result API
mysqli_result::fetch_column