Php 单元转换器
我正在努力让我的PHP单元转换器工作 我试图让多个转换器运行，但似乎无法让它工作 如果有人能告诉我哪里出了问题并帮我解决，那就太好了Php 单元转换器,php,html,converter,Php,Html,Converter,我正在努力让我的PHP单元转换器工作 我试图让多个转换器运行，但似乎无法让它工作 如果有人能告诉我哪里出了问题并帮我解决，那就太好了 <?php if($_POST){ $fahrenheit = $_POST['fahrenheit']; $celsius = ($fahrenheit - 32)*5/9; } if($_POST){ $celsius = $_POST['celcius']; $fahrenheit = ($celcius - 3
<?php
if($_POST){
$fahrenheit = $_POST['fahrenheit'];
$celsius = ($fahrenheit - 32)*5/9;
}
if($_POST){
$celsius = $_POST['celcius'];
$fahrenheit = ($celcius - 32)*5/9;
}
?>
<form action="" method="post">
Fahrenheit: <input type="text" name="fahrenheit" /><br />
<?php
if(isset($celsius)){
echo "Celsius = ".$celsius;
}
?>
</form>
<?php
function fahrenheit_to_celsius($given_value)
{
$celsius=5/9*($given_value-32);
return $celsius ;
}
function celsius_to_fahrenheit($given_value)
{
$fahrenheit=$given_value*9/5+32;
return $fahrenheit ;
}
function inches_to_centimeter($given_value)
{
$centimeter=$given_value/2.54;
return $centimeter ;
}
function centimeter_to_inches($given_value)
{
$inches=$given_value*2.54
}
?>
<html>
<head>
<title>Temp. Conv.</title>
</head>
<body>
<form action="" method="post">
<table>
<!-- FAHRENHEIGHT & CELCIUS V -->
<tr>
<td>
<select name="first_temp_type_name">
<option value="fahrenheit">Fahrenheit</option>
<option value="celsius">Celsius</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="text" name="given_value">
</td>
</tr>
<tr>
<td>
<select name="second_temp_type_name">
<option value="fahrenheit">Fahrenheit</option>
<option value="celsius">Celsius</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="submit" name="btn" value="Convert">
</td>
</tr>
<!--FAHRENHEIGHT & CELCIUS ^ -->
<!-- CENTEMETERS & INCHES -->
<tr>
<td>
<select name="first_length_type_name">
<option value="centimeter">centimeter</option>
<option value="inches">Inches</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="text" name="given_value">
</td>
</tr>
<tr>
<td>
<select name="second_length_type_name">
<option value="centimeter">centimeter</option>
<option value="inches">Inches</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="text" name="given_value">
</td>
</tr>
<!--CENTEMETERS & INCHES ^-->
<tr>
<td>
<?php
if(isset($_POST['btn']))
{
$first_temp_type_name=$_POST['first_temp_type_name'];
$second_temp_type_name=$_POST['second_temp_type_name'];
$given_value=$_POST['given_value'];
if($first_temp_type_name=='fahrenheit')
{
$celsious=fahrenheit_to_celsius($given_value);
echo "Fahrenheit $given_value = $celsious Celsious";
}
if($first_temp_type_name=='celsius')
{
$fahrenheit=celsius_to_fahrenheit($given_value);
echo "Celsious $given_value = $fahrenheit Fahrenheit";
}
}
if(isset($_POST['btn']))
{
$first_length_type_name=$_POST['first_length_type_name'];
$second_length_type_name=$_POST['second_length_type_name'];
$given_value=$_POST['given_value'];
if($first_length_type_name=='centimeter')
{
$centimeter=centimeter_to_inches($given_value);
echo "Centimeter $given_value = $inches Inches";
}
if($first_length_type_name=='inches')
{
$centimeter=inches_to_centimeter($given_value);
echo "Inches $given_value = $centimeter centimeter";
}
}
?>
</td>
</tr>
</table>
</form>
</body>
</html>
非常感谢您的帮助：如果您想制作一个转换器，您只需要一个输入，以及您希望转换为的内容之间的下拉列表。然后在提交表单时在PHP中使用一个开关来检查您希望使用的函数 您当前的问题是覆盖了很多值，并且没有检查正确的按钮。这也过于复杂化了 您可以进一步开发这个转换器，确保输入是一个实际的数字-使用filter_var和适合您需要的标志。您可以对其进行验证或消毒，请参阅
您好，请使用以下代码
<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$convertedTemperature = 0;
/* The condition is entered when the request is of POST type. */
if($_SERVER['REQUEST_METHOD'] == 'POST'){
$temperature = $_POST['temperature'];
$fromConvertionUnit = $_POST['fromConvertionUnit'];
$toConvertionUnit = $_POST['toConvertionUnit'];
/* if the temperature conversion are of same unit then no need for conversion */
if($fromConvertionUnit == $toConvertionUnit){
$convertedTemperature = $temperature;
}else if($fromConvertionUnit == 'fahrenheit' && $toConvertionUnit == 'celcius') {
/* formula to convert Fahrenheit to Celcius */
$convertedTemperature = ($temperature - 32) * 0.5556;
}else if($fromConvertionUnit == 'celcius' && $toConvertionUnit == 'fahrenheit') {
/* formula to convert Celcius to Fahrenheit */
$convertedTemperature = ($temperature * 1.8) + 32;
}
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Temperature Converter</title>
</head>
<body>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<div>
<!-- If the temperature value has be submitted and has data then it will prefilled -->
<label for="temperature">Temperature</label> <br/>
<input type="number" name="temperature" id="temperature" value="<?php echo (!empty($temperature)) ? $temperature : '' ?>">
</div>
<div>
<label for="fromConvertionUnit">Select From Convertion Unit</label><br/>
<select name="fromConvertionUnit" id="fromConvertionUnit">
<option value="fahrenheit">Fahrenheit</option>
<option value="celcius">Celcius</option>
</select>
</div>
<div>
<label for="toConvertionUnit">Select To Convertion Unit</label><br/>
<select name="toConvertionUnit" id="toConvertionUnit">
<option value="fahrenheit">Fahrenheit</option>
<option value="celcius">Celcius</option>
</select>
</div>
<!-- Once the page is submitted and conversion is done the respective values will be added in the following section -->
<div>
Converted Temperature <b> <?php echo (!empty($temperature)) ? $temperature : '--' ?></b> Value From <b><?php echo (!empty($fromConvertionUnit)) ? $fromConvertionUnit : '--' ?></b> TO <b><?php echo (!empty($toConvertionUnit)) ? $toConvertionUnit : '--' ?></b> is <b><?php echo (!empty($convertedTemperature)) ? $convertedTemperature : '--' ?><b/>
<label for="converted_value">Converted Value</label><br/>
<input type="number" value="<?php echo (!empty($convertedTemperature)) ? $convertedTemperature : '0' ?>">
</div>
<div>
<input type="submit" value="Convert">
</div>
</form>
</body>
</html>
如果美元邮政{需要数组键检查我该怎么做，对不起，我是PHP新手。如果$_POST在@Scuzzy有效，它只会检查POST methodsearch在San Google上是否发送了任何内容，你会找到很多入门教程，在那里你可以学习如何使用PHP制作表单：-.@Qirel是的，但是$fahrenheit和$concerties正在被覆盖十乘二if post语句。为什么有人要复制和粘贴这个？是什么使它起作用的，你做了什么更改？一个好的答案总是包括一些文本和描述。@Qirel我在代码中添加了一条注释。首先，他添加了两倍的条件，这是不必要的，公式没有正确应用。在他没有提到要重定向哪个页面，因此必须通过使用此代码正确处理：。因此，尽管如此，我还是让他使用我的代码。因此，我希望这能回答您的问题。请您重新投票表决我的答案。
<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$convertedTemperature = 0;
/* The condition is entered when the request is of POST type. */
if($_SERVER['REQUEST_METHOD'] == 'POST'){
$temperature = $_POST['temperature'];
$fromConvertionUnit = $_POST['fromConvertionUnit'];
$toConvertionUnit = $_POST['toConvertionUnit'];
/* if the temperature conversion are of same unit then no need for conversion */
if($fromConvertionUnit == $toConvertionUnit){
$convertedTemperature = $temperature;
}else if($fromConvertionUnit == 'fahrenheit' && $toConvertionUnit == 'celcius') {
/* formula to convert Fahrenheit to Celcius */
$convertedTemperature = ($temperature - 32) * 0.5556;
}else if($fromConvertionUnit == 'celcius' && $toConvertionUnit == 'fahrenheit') {
/* formula to convert Celcius to Fahrenheit */
$convertedTemperature = ($temperature * 1.8) + 32;
}
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Temperature Converter</title>
</head>
<body>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<div>
<!-- If the temperature value has be submitted and has data then it will prefilled -->
<label for="temperature">Temperature</label> <br/>
<input type="number" name="temperature" id="temperature" value="<?php echo (!empty($temperature)) ? $temperature : '' ?>">
</div>
<div>
<label for="fromConvertionUnit">Select From Convertion Unit</label><br/>
<select name="fromConvertionUnit" id="fromConvertionUnit">
<option value="fahrenheit">Fahrenheit</option>
<option value="celcius">Celcius</option>
</select>
</div>
<div>
<label for="toConvertionUnit">Select To Convertion Unit</label><br/>
<select name="toConvertionUnit" id="toConvertionUnit">
<option value="fahrenheit">Fahrenheit</option>
<option value="celcius">Celcius</option>
</select>
</div>
<!-- Once the page is submitted and conversion is done the respective values will be added in the following section -->
<div>
Converted Temperature <b> <?php echo (!empty($temperature)) ? $temperature : '--' ?></b> Value From <b><?php echo (!empty($fromConvertionUnit)) ? $fromConvertionUnit : '--' ?></b> TO <b><?php echo (!empty($toConvertionUnit)) ? $toConvertionUnit : '--' ?></b> is <b><?php echo (!empty($convertedTemperature)) ? $convertedTemperature : '--' ?><b/>
<label for="converted_value">Converted Value</label><br/>
<input type="number" value="<?php echo (!empty($convertedTemperature)) ? $convertedTemperature : '0' ?>">
</div>
<div>
<input type="submit" value="Convert">
</div>
</form>
</body>
</html>