PHP5实现的一个简单的计算器
1.配置phpstorm2018 ,php环境
2.配置内置web server
3.新建项目，编写代码：
caculator.php
<html>
<head>
</head>
<body>
<?php
if (!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：