HTML multiple checkboxes with identical name= into PHP $_POST - php

Question

So I have a 3rd party survey tool that generates html surveys, and for multi-select checkboxes in a given question, it will name them all the same:
<input type="checkbox" value="1" id="V25_1" name="V25">
<input type="checkbox" value="2" id="V25_2" name="V25">
Is there a way that all the selected values can be retrieved in PHP?
$_POST by default seems to simply store only the last selected value.

Answer 1

Your code should be approximately the following:
<select multiple="multiple">
<input type="checkbox" value="1" id="V25_1" name="V25[]">
<input type="checkbox" value="2" id="V25_2" name="V25[]">
</select>
V25[] means that you can get the value from an array. e.g. $_GET['V25'][0]
You could also specify an index if needed:
V25[1] or V25[a]

Answer 2

You could run something like this before the form submit:
$(":checkbox").each(function(){
$(this).attr("name",$(this).attr("id"));
});
or
$(":checkbox").each(function(){
$(this).attr("name",$(this).attr("name")+"[]");
});

Answer 3

It is possible to retrieve all variables when you have multiple elements with identical 'name' parameters.
After much scouring the internet for a solution, I wrote the following php script which grabs the raw post data, and parses it:
<?php
function RawPostToArray() {
$rawPostData = file_get_contents("php://input");
if($rawPostData) {
$rawPostData = explode('&', $rawPostData);
if($rawPostData && is_array($rawPostData) && count($rawPostData)) {
$result = array();
foreach($rawPostData as $entry) {
$thisArray = array();
$split = explode('=', urldecode($entry), 2);
$value = (count($split) == 2) ? $split[1] : '';
if(array_key_exists($split[0], $result)) {
if(is_array($result[$split[0]])) {
$result[$split[0]][] = $value;
}
else {
$thisArray[] = $result[$split[0]];
$thisArray[] = $value;
$result[$split[0]] = $thisArray;
}
}
else {
$result[$split[0]] = $split[1];
}
}
return $result;
}
else return array();
}
else return array();
}
?>
Any duplicate 'names' are bumped down into an array within the result, much the way $_POST does, when the HTML is coded correctly.
There is probably plenty of room for improvement here, and I'm sure not all situations are accounted for, but it works well for my application.
Suggestions are appreciated where improvements can be made.