ini_get_all 函數返回的數據格式是怎樣的？附帶具體示例解析

gitbox 2025-09-18
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 前言部分：與文章內容無關的 PHP 代碼示例</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"歡迎使用 PHP 學習示例！\n"</span></span><span>;
</span><span><span class="hljs-variable">$time</span></span><span> = </span><span><span class="hljs-title function_ invoke__">date</span></span><span>(</span><span><span class="hljs-string">'Y-m-d H:i:s'</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"當前時間: <span class="hljs-subst">$time</span></span></span><span>\n";
</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><span><span class="hljs-comment">// 正文內容：關於 ini_get_all 函數的數據格式解析</span></span><span>

<span class="hljs-comment">/**
 * ini_get_all() 函數概述
 * 
 * ini_get_all() 是 PHP 內置函數，用於獲取配置文件 php.ini 中的配置信息。
 * 可以獲取全部配置項，也可以針對指定配置項獲取詳細信息。
 * 返回的數據是一個關聯數組，數組的鍵是配置項名稱，值是一個包含該配置項詳細信息的數組。
 * 
 * 數據格式：
 * [
 *   '配置項名' =&gt; [
 *       'global_value'  =&gt; '全局值（php.ini中定義的值）',
 *       'local_value'   =&gt; '本地值（運行時通過 ini_set 設置的值）',
 *       'access'        =&gt; int（訪問權限標識）
 *   ],
 *   ...
 * ]
 * 
 * 其中 access 值可能為：
 *   - 1 (PHP_INI_USER)：可以在用戶腳本中使用 ini_set 修改
 *   - 2 (PHP_INI_PERDIR)：可以在 php.ini、.htaccess 或 httpd.conf 中修改
 *   - 4 (PHP_INI_SYSTEM)：可以在 php.ini 或 httpd.conf 中修改
 *   - 7 (PHP_INI_ALL)：任何地方都可以修改
 */</span>

</span><span><span class="hljs-comment">// 獲取全部配置項</span></span><span>
</span><span><span class="hljs-variable">$all_ini</span></span><span> = </span><span><span class="hljs-title function_ invoke__">ini_get_all</span></span><span>();

</span><span><span class="hljs-comment">// 輸出部分示例（僅展示前5個配置項）</span></span><span>
</span><span><span class="hljs-variable">$counter</span></span><span> = </span><span><span class="hljs-number">0</span></span><span>;
</span><span><span class="hljs-keyword">foreach</span></span><span> (</span><span><span class="hljs-variable">$all_ini</span></span><span> </span><span><span class="hljs-keyword">as</span></span><span> </span><span><span class="hljs-variable">$key</span></span><span> =&gt; </span><span><span class="hljs-variable">$info</span></span><span>) {
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"配置項: <span class="hljs-subst">$key</span></span></span><span>\n";
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"全局值: "</span></span><span> . </span><span><span class="hljs-variable">$info</span></span><span>[</span><span><span class="hljs-string">'global_value'</span></span><span>] . </span><span><span class="hljs-string">"\n"</span></span><span>;
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"本地值: "</span></span><span> . </span><span><span class="hljs-variable">$info</span></span><span>[</span><span><span class="hljs-string">'local_value'</span></span><span>] . </span><span><span class="hljs-string">"\n"</span></span><span>;
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"訪問權限: "</span></span><span> . </span><span><span class="hljs-variable">$info</span></span><span>[</span><span><span class="hljs-string">'access'</span></span><span>] . </span><span><span class="hljs-string">"\n"</span></span><span>;
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"------------------------\n"</span></span><span>;
    </span><span><span class="hljs-variable">$counter</span></span><span>++;
    </span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$counter</span></span><span> &gt;= </span><span><span class="hljs-number">5</span></span><span>) </span><span><span class="hljs-keyword">break</span></span><span>;
}

<span class="hljs-comment">/**
 * 獲取指定配置項示例
 */</span>
</span><span><span class="hljs-variable">$session_config</span></span><span> = </span><span><span class="hljs-title function_ invoke__">ini_get_all</span></span><span>(</span><span><span class="hljs-string">'session'</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"\n獲取 session 配置項详细信息：\n"</span></span><span>;
</span><span><span class="hljs-title function_ invoke__">print_r</span></span><span>(</span><span><span class="hljs-variable">$session_config</span></span><span>);

<span class="hljs-comment">/**
 * 示例解析：
 * 
 * 假設 session.save_path 的返回值為：
 * [
 *   'global_value' =&gt; '/var/lib/php/sessions',
 *   'local_value'  =&gt; '/tmp',
 *   'access'       =&gt; 7
 * ]
 * 
 * 解釋：
 * - global_value: php.ini 中設置的默認路徑
 * - local_value: 當前腳本運行環境中可能通過 ini_set 修改後的路徑
 * - access: 7 表示该配置項在任何地方都可修改
 */</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><span><span class="hljs-comment">// 尾部部分：與文章內容無關的 PHP 代碼示例</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"本文示例演示完畢！\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"祝你 PHP 學習順利！\n"</span></span><span>;
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
ini_get_all