Ajax Form submit receiving in PHP - php

Question

I am experiencing some issues with a form I am making. I have the code to post a form to my PHP script that is meant to handle the data with this code:
<script type="text/javascript">
$(document).ready(function()
{
$("#submit").click(function()
{
var q1 = $("#q1").val();
var q2 = $("#q2").val();
var answers = "page=1&q1="+q1+"&q2="+q2;
$.ajax({
type:'POST',
url:'add.php',
data:answers,
success:function(response)
{
$("#answers").html(response);
}
});
});
});
</script>
This form is then received in my PHP script like this:
$page = $_POST['page'];
$q1 = $_POST['q1'];
$q2 = $_POST['q2'];
echo "Page: " .$page . "<br/>Question 1: " . $q1 . "<br/>Question 2: " . $q2;
The issue of it all is that I want this form to be able to handle X amount of inputs and also handle input I do not know the name of. Like I can get 5 textboxes, or 2 textboxes + a string of radiobuttons and so on. Is there a way to collect ALL $_POST data and then explode it or something similar so I can get it ready for the database? I wish to recover all question id's(values) and all answer values(could be a string or an int representing a radiobutton id).

Answer 1

You can iterate through all POST and GET request parameters by simply treating POST and GET as an array. For an example:
print_r($_POST);
Alternatively:
foreach ($_POST as $key => $value) {
echo $key." = ".$value."<br>";
}
If you want to handle a variating amount of input fields, you can define an incrementing naming convention and use loops to gather them all to an array.

Answer 2

with print_r($_POST); you can look at all values.
or something like this:
foreach ( $_POST AS $key => $value) {
echo $key." => ".$value."<br>";
}

Answer 3

First: Let jQuery build your data string, your current method requires you to know each field in advance and can't handle data with special characters in it.
url:'add.php',
data: $('#myForm').serialize(),
success:function(response)
Second: Name your fields using the PHP multiple fields with the same name convention:
<input type="radio" name="answer[1]" value="foo">
<input type="radio" name="answer[1]" value="bar">
You can then access them as:
$_POST['answer'][]
It is an array, so you can get the '1' and the 'foo' or the 'bar' in a loop.