确定是否没有使用 PHP 选择单选按钮

Question

我正在尝试编写一些代码来确定表单上是否没有选择单选按钮

表单由许多字段组成，但只是在下面的表单中包含了单选按钮

<form action="myPHPPage.php" method="post"> 

Value 1 <input type="radio" name="basic" value="myValue1"> 
Value 2 <input type="radio" name="silver" value="myValue2">
Value 3 <input type="radio" name="gold" value="myValue3">

<input type="submit" name="send" value="Submit">

然后在 myPHPPage.php 页面中，我有类似下面的内容将 POST 值分配给变量：

if(!isset($_POST['basic'])) {
 $var = $_POST['basic'];};
 $someValue = $var;
}

但我想要一些代码，例如：如果没有选择单选按钮 $var = $someValue

Answer 1

您可以检查所有 $_POST 元素，而不是比较名称和它们的值。

foreach($_POST as $key=>$value)
{
  echo "$key=$value";
}

PHP: Possible to automatically get all POSTed data?

Answer 2

    <form action="myPHPPage.php" method="post"> 

如果按钮是可选的，请制作一组带有名称属性值的单选按钮。

 Value 1 <input type="radio" name="basic" value="myValue1"> 
 Value 2 <input type="radio" name="basic" value="myValue2">
 Value 3 <input type="radio" name="basic" value="myValue3">

 <input type="submit" name="send" value="Submit">

 Then use a php condition here.
 <?php


if(isset($_POST['basic'])) {
 $var = $_POST['basic'];};
 $someValue = $var;
}

Answer 3

关于单选按钮，您首先要了解的是，如果它们反映相同的属性，它们应该具有相同的名称。 因此，您的表单必须像这样更改。

  <form action="myPHPPage.php" method="post"> 

Value 1 <input type="radio" name="radioName" value="basic"> 
Value 2 <input type="radio" name="radioName" value="silver">
Value 3 <input type="radio" name="radioName" value="gold">

<input type="submit" name="send" value="Submit">

然后，如果没有选择单选按钮，您想要分配一个值。 您可以执行以下操作：

$var="";
$someValue="abc";
    if(isset($_POST['radionName'])) {
 $var = $_POST['radionName'];// This means one radio button is selected, thus you have a value.
}
else{
$var=$someValue; // No radio button is selected, thus you can assign a default desired value.
}

Answer 4

试试这个....你应该让所有单选按钮都具有相同的名称

<form action="myPHPPage.php" method="post"> 

    Value 1 <input type="radio" name="basic" value="myValue1"> 
    Value 2 <input type="radio" name="basic" value="myValue2">
    Value 3 <input type="radio" name="basic" value="myValue3">

    <input type="submit" name="send" value="Submit">

</form>

这里是您提交后在服务器上的 php 代码

<?php
    if(isset($_POST['send'])) { //change index to submit button name

         if($_POST['basic'] == ''){ // if no button is selected then

         $var = $someValue;

         }//if ends here

        else
         { //if any of the radio is selected "if you don't want else so remove that"

         $var = $_POST['basic'];

        }//else ends here

    }//isset ends here

?>

Answer 5

如果您使用收音机，则该特定选项的所有 input radio 名称应该相同。

Value 1 <input type="radio" name="basic" value="basic"> 
Value 2 <input type="radio" name="basic" value="silver">
Value 3 <input type="radio" name="basic" value="gold">

<?php
if(isset($_POST['basic'])) 
{
  $var = $_POST['basic'];
}
?>

Answer 6

试试这个：

<?php

// Handle Post
if (isset($_POST['send']))
{
    // Get Post Values
    $basic  = isset($_POST['basic'])  ? $_POST['basic']  : '';
    $silver = isset($_POST['silver']) ? $_POST['silver'] : '';
    $gold   = isset($_POST['gold'])   ? $_POST['gold']   : '';

    // Atleast one is selected
    if (!empty($basic) || !empty($silver) || !empty($gold))
    {
        echo 'You have made atleast one selection';
    }
    else
    {
        echo 'You have not made any selection.';
    }
}

?>

<form action="" method="post"> 
Value 1 <input type="radio" name="basic" value="myValue1"> 
Value 2 <input type="radio" name="silver" value="myValue2">
Value 3 <input type="radio" name="gold" value="myValue3">
<input type="submit" name="send" value="Submit">
</form>

Answer 7

您需要将all-radio buttons 绑定在group 中

Value 1 <input type="radio" name="basic" value="basic"> 
Value 2 <input type="radio" name="basic" value="silver">
Value 3 <input type="radio" name="basic" value="gold">

然后在 PHP

<?php
   if(isset($_POST['basic'])) { //remove ! from condition
      $var = $_POST['basic'];};
      echo $someValue = $var;
   }
?>

Answer 8

<form action="myPHPPage.php" method="post"> 

   Value 1 <input type="radio" name="basic" value="myValue1"> 
   Value 2 <input type="radio" name="basic" value="myValue2">
   Value 3 <input type="radio" name="basic" value="myValue3">

   <input type="submit" name="send" value="Submit">

   <?php


    if(!isset($_POST['basic'])) {
     $var = $_POST['basic'];};
     $someValue = $var;


     Please Try this one