Web form to email giving Undefined index: error

maxwell_

I am trying to create a survey form that emails the results to an email address - not a database
None of the radio buttons are pre-selected.
If I submit the form without choosing any of the buttons I receive the following error -

Notice: Undefined index: radio_group_1 in /public_html/processForm.php on line 8
Fill All Fields..

 if(isset($_POST["send_message"])){

if($_POST["radio_group_1"]==""||$_POST["radio_group_2"]==""||$_POST["radio_group_3"]==""||$_POST["radio_group_4"]==""||$_POST["radio_group_5"]==""||$_POST["radio_group_6"]==""||$_POST["radio_group_7"]==""||$_POST["radio_group_8"]==""||$_POST["radio_group_9"]==""||$_POST["radio_group_10"]==""||$_POST["sender_message"]==""){
echo "Fill All Fields..";
}else{

$mail_to = "email@account"; 

$message = $_POST['sender_message'] = preg_replace("/\r|\n/", "", $_POST['sender_message']);

$data = strip_tags(trim($message));  

$question1 = $_POST['radio_group_1'];	
$question2 = $_POST['radio_group_2'];
$question3 = $_POST['radio_group_3'];
$question4 = $_POST['radio_group_4'];
$question5 = $_POST['radio_group_5'];
$question6 = $_POST['radio_group_6'];
$question7 = $_POST['radio_group_7'];
$question8 = $_POST['radio_group_8'];
$question9 = $_POST['radio_group_9'];
$question10 = $_POST['radio_group_10'];

This is an example of one of the radio button groups

<label for="radio_1">
      <input type="radio" name="radio_group_1" value="1" id="radio_1">
      1</label>
    <label for="radio_2">
      <input type="radio" name="radio_group_1" value="2" id="radio_2">
      2</label>
    <label for="radio_3">
      <input type="radio" name="radio_group_1" value="3" id="radio_3">
      3</label>
    <label for="radio_4">
      <input type="radio" name="radio_group_1" value="4" id="radio_4">
      4</label>
    <label for="radio_5">
      <input type="radio" name="radio_group_1" value="5" id="radio_5">
      5</label>

Weedpacket

If none of the radio buttons in a group is selected, the $_POST variable with that group's name won't exist (what would it contain if it did?).

So, like any other value submitted from a form, you need to check that it exists before you try to use it (and decide what to do if it doesn't).

sid

i.e. on top of checking for

if($_POST["radio_group_1"]==""|| //&#8230;

you would have to first check for

if(isset($_POST["radio_group_1"])|| //&#8230;

NogDog

You could always define a default value for each radio button set and initialize it as checked, to ensure something gets sent -- though it's still always a good idea to check for existence of all form elements you want to access.