网页开发使用php实现简单的计算器php

<?php // 获取用户输入 $number1 = $_POST['number1'] ?? 0; $number2 = $_POST['number2'] ?? 0; $operation = $_POST['operation'] ?? '+'; // 执行运算 switch ($operation) { case '+': $result = $number1 + $number2; break; case '-': $result = $number1 - $number2; break; case '*': $result = $number1 * $number2; break; case '/': if ($number2 == 0) { $result = "无穷大"; // 或者处理错误 } else { $result = $number1 / $number2; } break; default: $result = "无效运算"; // 或者处理错误 break; } // 显示结果 echo "结果是：" . $result; ?>