为增值税计算器布尔值 - Boolean for VAT Calculator

Boolean for VAT Calculator

本文关键字：布尔值计算器增值税 | 更新日期: 2023-09-27

我正在创建一个简单的增值税计算器，我有一个问题与下拉列表选项。这两个选项是$vatincluded &vatexcluded美元。如果选择了$vatincluded，则进行简单的计算，如果选择了$vatexcluded，则输入的金额保持原样。我收集我需要设置一个布尔值来检查$vatincluded是否已在下拉列表中选择，但不确定如何添加到脚本中。谁能给我指个正确的方向?

Many Thanks in advance…

<?php
  $first_name = $_POST['firstname'];
  $last_name = $_POST['lastname'];
  $email = $_POST['email'];
  $ammount = $_POST['ammount'];
  $vatincluded = $_POST['vatincluded'];
  $vatexcluded = $_POST['vatexcluded'];
  if ($vatincluded) {
    $netammount = ($ammount / 120 * 100);
  }
   else  
   {
    $netammount = $ammount;
    $vatammount = ($netammount * 0.20);
    $grossammount = ($netammount + $vatammount);
   }
  echo 'Thanks for submitting the form.<br />';
  echo 'Net Ammount &pound;: ' . $netammount  . '<br />';
  echo 'Vat Ammount &pound;: ' . $vatammount . '<br />';
  echo 'Gross Ammount &pound;: ' . $grossammount . '<br />';
  echo 'Your first name ' . $first_name . '<br />';
  echo 'Your last name: ' . $last_name . '<br />';
  echo 'Your email address is ' . $email;
?>

如果你说的dropdown list是指一个选择元素。

你可以这样做:

HTML

<select name="vat">
    <option value="yes">Include</option>
    <option value="no">Not included</option>
</select>

PHP

if ($_POST['vat'] == 'yes') {
  // vat include
} else {
  // vat excluded
}