PHP实现简单的计算器

本文实例为大家分享了PHP实现简单计算器的具体代码，供大家参考，具体内容如下

caculator.php

<html><head></head><body><?phpif (!empty($_POST)) {$data1 = $_POST[\"data1\"];$data2 = $_POST[\"data2\"];$fuhao = $_POST[\"fuhao\"];$result = \"\";echo $data1;echo $data2;echo $fuhao;echo $result;if ($fuhao == \'+\') {$result = $data1 + $data2;} else if ($fuhao == \'-\') {$result = $data1 - $data2;} else if ($fuhao == \'*\') {$result = $data1 * $data2;} else if ($fuhao == \'/\') {$result = $data1 / $data2;}} else {$data1 = \"\";$data2 = \"\";$fuhao = \"\";$result = \"\";}?><form action=\"caculator.php\" method=\"post\"><input type=\"text\" name=\"data1\" value=\"<?php echo $data1; ?>\"/><select name=\"fuhao\"><option value=\"+\"<?php if ($fuhao == \"+\") {echo \'selected=\"selected\"\';} ?>>+</option><option value=\"-\"<?php if ($fuhao == \"-\") {echo \'selected=\"selected\"\';} ?>>-</option><option value=\"*\"<?php if ($fuhao == \"*\") {echo \'selected=\"selected\"\';} ?>>*</option><option value=\"/\"<?php if ($fuhao == \"/\") {echo \'selected=\"selected\"\';} ?>>/</option></option></select><input type=\"text\" name=\"data2\" value=\"<?php echo $data2; ?>\"/><input type=\"submit\" value=\"=\"/><input name=\"result\" type=\"text\" value=\"<?php echo $result; ?>\"/><input type=\"reset\"/></form></body></html>

运行结果：