在 Laravel 框架中，怎样正确调用和使用 cosh 函数进行计算

gitbox 2025-09-17
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 这里是文章前无关的 PHP 代码示例</span></span><span>
</span><span><span class="hljs-variable">$welcomeMessage</span></span><span> = </span><span><span class="hljs-string">"欢迎阅读本文教程！"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-variable">$welcomeMessage</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">/*
标题: 在 Laravel 框架中，怎样正确调用和使用 cosh 函数进行计算
*/</span>

</span><span><span class="hljs-comment">// Laravel 是一个流行的 PHP 框架，开发者在处理数学计算时，有时会需要使用双曲余弦函数 cosh()。</span></span><span>
</span><span><span class="hljs-comment">// 本文将详细介绍在 Laravel 中正确调用和使用 cosh() 函数的方式。</span></span><span>

<span class="hljs-comment">/**
 * 1. PHP 原生 cosh() 函数
 * PHP 提供了原生的 cosh() 函数，它接收一个浮点数或整数作为参数，返回该数的双曲余弦值。
 *
 * 语法：
 * 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">"数字 <span class="hljs-subst">{$number}</span></span></span><span> 的双曲余弦值为: </span><span><span class="hljs-subst">{$result}</span></span><span>&lt;br&gt;";

<span class="hljs-comment">/**
 * 2. 在 Laravel 控制器中使用 cosh()
 * 假设我们在 Laravel 的控制器中需要计算双曲余弦值：
 */</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">$request</span></span></span><span>)
    {
        </span><span><span class="hljs-comment">// 从请求中获取数字</span></span><span>
        </span><span><span class="hljs-variable">$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">// 调用 PHP 原生 cosh() 函数</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">// 返回结果到视图或 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 结果
 * 如果你想在前端模板中展示计算结果，可以这样做：
 */</span>

</span><span><span class="hljs-comment">// 假设 $coshValue 已从控制器传到视图</span></span><span>
</span><span><span class="hljs-meta">?&gt;</span></span><span>
&lt;p&gt;数字 {{ </span><span><span class="hljs-variable">$number</span></span><span> }} 的双曲余弦值为: {{ </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. 注意事项
 * - cosh() 接受的参数类型必须是数值，否则会抛出警告。
 * - 对于大数值，结果可能会非常大，需要注意数据类型溢出。
 * - 在数学运算较多的场景中，也可以考虑使用 Laravel 封装的服务或者自定义 Helper 函数来统一调用。
 */</span>

<span class="hljs-comment">/**
 * 总结：
 * 在 Laravel 框架中，调用 cosh() 非常简单，因为 Laravel 完全支持 PHP 原生函数。
 * 你只需要在控制器或者服务类中直接调用 cosh()，然后将结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>

&lt;hr&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 这里是文章后无关的 PHP 代码示例</span></span><span>
</span><span><span class="hljs-variable">$footerMessage</span></span><span> = </span><span><span class="hljs-string">"本文示例仅用于学习和演示。"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-variable">$footerMessage</span></span><span>;
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
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