在Laravel 框架中，怎樣正確調用和使用cosh 函數進行計算

gitbox 2025-09-17
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 這裡是文章前無關的 PHP 代碼示例</span></span><span>
</span><span><span class="hljs-variable">$welcomeMessage</span></span><span> = </span><span><span class="hljs-string">"歡迎閱讀本文教程！"</span></span><span>;
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&lt;hr&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
<span class="hljs-comment">/*
標題: 在 Laravel 框架中，怎樣正確調用和使用 cosh 函數進行計算
*/</span>

</span><span><span class="hljs-comment">// Laravel 是一個流行的 PHP 框架，開發者在處理數學計算時，有時會需要使用雙曲餘弦函數 cosh()。</span></span><span>
</span><span><span class="hljs-comment">// 本文將詳細介紹在 Laravel 中正確調用和使用 cosh() 函數的方式。</span></span><span>

<span class="hljs-comment">/**
 * 1. PHP 原生 cosh() 函數
 * PHP 提供了原生的 cosh() 函數，它接收一個浮點數或整數作為參數，返回該數的雙曲餘弦值。
 *
 * 文法：
 * float cosh(float $number)
 *
 * 例子：
 */</span>
</span><span><span class="hljs-variable">$number</span></span><span> = </span><span><span class="hljs-number">2.0</span></span><span>;
</span><span><span class="hljs-variable">$result</span></span><span> = </span><span><span class="hljs-title function_ invoke__">cosh</span></span><span>(</span><span><span class="hljs-variable">$number</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"數字 <span class="hljs-subst">{$number}</span></span></span><span> 的雙曲餘弦值為: </span><span><span class="hljs-subst">{$result}</span></span><span>&lt;br&gt;";

<span class="hljs-comment">/**
 * 2. 在 Laravel 控制器中使用 cosh()
 * 假設我們在 Laravel 的控制器中需要計算雙曲餘弦值：
 */</span>

</span><span><span class="hljs-keyword">namespace</span></span><span> </span><span><span class="hljs-title class_">App</span></span><span>\</span><span><span class="hljs-title class_">Http</span></span><span>\</span><span><span class="hljs-title class_">Controllers</span></span><span>;

</span><span><span class="hljs-keyword">use</span></span><span> </span><span><span class="hljs-title">Illuminate</span></span><span>\</span><span><span class="hljs-title">Http</span></span><span>\</span><span><span class="hljs-title">Request</span></span><span>;

</span><span><span class="hljs-class"><span class="hljs-keyword">class</span></span></span><span> </span><span><span class="hljs-title">MathController</span></span><span> </span><span><span class="hljs-keyword">extends</span></span><span> </span><span><span class="hljs-title">Controller</span></span><span>
{
    </span><span><span class="hljs-keyword">public</span></span><span> </span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">calculateCosh</span></span><span>(</span><span><span class="hljs-params">Request <span class="hljs-variable">$request</span></span></span><span>)
    {
        </span><span><span class="hljs-comment">// 从请求中获取數字</span></span><span>
        </span><span><span class="hljs-variable">$number</span></span><span> = </span><span><span class="hljs-variable">$request</span></span><span>-&gt;</span><span><span class="hljs-title function_ invoke__">input</span></span><span>(</span><span><span class="hljs-string">'number'</span></span><span>, </span><span><span class="hljs-number">0</span></span><span>);

        </span><span><span class="hljs-comment">// 調用 PHP 原生 cosh() 函數</span></span><span>
        </span><span><span class="hljs-variable">$coshValue</span></span><span> = </span><span><span class="hljs-title function_ invoke__">cosh</span></span><span>(</span><span><span class="hljs-variable">$number</span></span><span>);

        </span><span><span class="hljs-comment">// 返回結果到視圖或 JSON</span></span><span>
        </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-title function_ invoke__">response</span></span><span>()-&gt;</span><span><span class="hljs-title function_ invoke__">json</span></span><span>([
            </span><span><span class="hljs-string">'number'</span></span><span> =&gt; </span><span><span class="hljs-variable">$number</span></span><span>,
            </span><span><span class="hljs-string">'cosh'</span></span><span> =&gt; </span><span><span class="hljs-variable">$coshValue</span></span><span>,
        ]);
    }
}

<span class="hljs-comment">/**
 * 3. 在 Blade 模板中展示 cosh 結果
 * 如果你想在前端模板中展示计算結果，可以這樣做：
 */</span>

</span><span><span class="hljs-comment">// 假設 $coshValue 已從控制器傳到視圖</span></span><span>
</span><span><span class="hljs-meta">?&gt;</span></span><span>
&lt;p&gt;數字 {{ </span><span><span class="hljs-variable">$number</span></span><span> }} 的雙曲餘弦值為: {{ </span><span><span class="hljs-variable">$coshValue</span></span><span> }}&lt;/p&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
<span class="hljs-comment">/**
 * 4. 注意事項
 * - cosh() 接受的參數類型必須是數值，否則會拋出警告。
 * - 對於大數值，結果可能会非常大，需要注意數據類型溢出。
 * - 在數學運算較多的場景中，也可以考慮使用 Laravel 封裝的服務或者自定義 Helper 函數来统一調用。
 */</span>

<span class="hljs-comment">/**
 * 總結：
 * 在 Laravel 框架中，調用 cosh() 非常簡單，因為 Laravel 完全支持 PHP 原生函數。
 * 你只需要在控制器或者服务类中直接調用 cosh()，然后将結果返回给前端或其他业务逻辑即可。
 */</span>

</span><span><span class="hljs-meta">?&gt;</span></span><span>

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</span><span><span class="hljs-meta">&lt;?php</span></span><span>
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</span><span><span class="hljs-variable">$footerMessage</span></span><span> = </span><span><span class="hljs-string">"本文示例僅用於學習和演示。"</span></span><span>;
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</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
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