get form data of radio buttons with different names

Question

my php page contains a form with multiple radio buttons with different names as shown below:

for( $i=1; $i<=$unknownNumber; $i++ ){

echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"cercle\" onchange=\"submit(this.form)\" checked >");
echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"rectangle\"  onchange=\"submit(this.form)\" >");
echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"triangle\"   onchange=\"submit(this.form)\" >");

}

How can i get the form data via $_POST[" ? "] from a process php page?

I dont know what i should write into the quote of $_POST["..."] , because the names of radio buttons are different.

A friend of mine advice me to get these Data just by doing as below,

foreach ($_POST as $answer) {


}

I get them with this method, but i am blocked to use ajax with it.

$(document).ready(function() {

    $('#myForm').on('submit', function() {

        var radio = $('#....').val(); // I dont know which name i should use here

        $.post( "process.php", { radio: ? }, function(data){ 

            alert('Good');

        });

        return false; 
    });

});

Answer 1

I modified your code. In php removed onclick event

for( $i=1; $i<=$unknownNumber; $i++ ){

   echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"cercle\" checked>");
   echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"rectangle\">");
   echo("<input type=\"radio\" name=\""."radio".$i."\" value=\"triangle\">");
}

And JS modified to this

$(document).ready(function() {

    $('input[name^="radio"]').on('click', function() {
        $.post( "process.php", $("#myForm").serialize(), function(data){
            alert('Good');
        });
    });
});

After each click on radio to your PHP script "process.php" will be sent full form. For exapmle here is POST data :

radio1:triangle

radio2:cercle

radio3:triangle

According to this request you will have

$_POST["radio1"]='triangle'; 
$_POST["radio2"]='cercle';
$_POST["radio3"]='triangle';

Update!!!!

In chrome developer tools you can see smth like this

Here is my process.php

$myArray = $_POST;
var_dump($myArray);