Identifying if no radio buttons selected with PHP - php

Question

I'm trying to write some code that will determine if no radio buttons are selected on a form
the form consists of many fields but have just included the radio buttons in form below
<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">
then in the myPHPPage.php page I have something like below to assign the POST value to a variable:
if(!isset($_POST['basic'])) {
$var = $_POST['basic'];};
$someValue = $var;
}
But I want some code like: If no radio buttons selected $var = $someValue

Answer 1

You need to bind all-radio buttons in a group like
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">
Then in PHP
<?php
if(isset($_POST['basic'])) { //remove ! from condition
$var = $_POST['basic'];};
echo $someValue = $var;
}
?>

Answer 2

TRY THIS....you should have all radio button same NAME
<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>
here your php code on server after the submit is press
<?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 3

Try this:
<?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 4

If you are using radio, all the names of input radio for that particular option should be same.
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 5

The first thing you have to know about radio button is that if they are reflecting the same attribute, they should have a same name.
Thus your form have to be changed like this.
<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">
Then you want to assign a value if no radio button is selected.
You can do the following:
$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 6

<form action="myPHPPage.php" method="post">
if buttons are optional please make a group of radio button with name attribute value.
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 7

You can check all $_POST elements,than can compare name and their values.
foreach($_POST as $key=>$value)
{
echo "$key=$value";
}
PHP: Possible to automatically get all POSTed data?

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