Php - 测试是否选择了单选按钮并获取值

php

2022-08-31 00:08:58

我正在使用php。我想知道如何测试是否选择了单选按钮并获取值？我可以测试是否选择了单选按钮，但我无法获得该值。我创建了一个按钮来测试我的表单。首先，我选择一个单选按钮，然后单击该按钮，它必须显示一条消息，说明我选择了哪个值并将此值放入变量中。为了测试是否选择了单选按钮，我这样做了：

$selected_radio=$_POST['SINGLE_' . $question->id . $multi_name_adjust . ''];
if ($selected_radio = 'checked'){}

谢谢

答案 1

这很简单，看看下面的代码：

形式：

<form action="result.php" method="post">
  Answer 1 <input type="radio" name="ans" value="ans1" /><br />
  Answer 2 <input type="radio" name="ans" value="ans2"  /><br />
  Answer 3 <input type="radio" name="ans" value="ans3"  /><br />
  Answer 4 <input type="radio" name="ans" value="ans4"  /><br />
  <input type="submit" value="submit" />
</form>

PHP 代码：

<?php 

$answer = $_POST['ans'];  
if ($answer == "ans1") {          
    echo 'Correct';      
}
else {
    echo 'Incorrect';
}          
?>

答案 2

在php中执行此操作的一种非常有效的方法：

<form action="#" method="post">
<select name="Color">
<option value="Red">Red</option>
<option value="Green">Green</option>
<option value="Blue">Blue</option>
<option value="Pink">Pink</option>
<option value="Yellow">Yellow</option>
</select>
<input type="submit" name="submit" value="Get Selected Values" />
</form>
<?php
if(isset($_POST['submit'])){
$selected_val = $_POST['Color'];  // Storing Selected Value In Variable
echo "You have selected :" .$selected_val;  // Displaying Selected Value
}
?>

对于复选框，多选：

<form action="#" method="post">
<select name="Color[]" multiple> // Initializing Name With An Array
<option value="Red">Red</option>
<option value="Green">Green</option>
<option value="Blue">Blue</option>
<option value="Pink">Pink</option>
<option value="Yellow">Yellow</option>
</select>
<input type="submit" name="submit" value="Get Selected Values" />
</form>
<?php
if(isset($_POST['submit'])){
// As output of $_POST['Color'] is an array we have to use foreach Loop to display individual value
foreach ($_POST['Color'] as $select)
{
echo "You have selected :" .$select; // Displaying Selected Value
}
?>