Store Checkedboxes in session PHP->Javascript

[Najjar]

Hi everybody,
I am using paging in one of my websites,
in each page there are 9 images with checkbox for each one.
I want to be able to check lets say 3
of the boxes from the first page
and two of em from the second one
then I will submit the selection of these
checkboxes when I am done.

My best guess was calling a javascript function on each checkbox that stores its value in a session.

My problem is that I am noooo good in javascript and I really need your help.

One more thing that the checkboxes are
being created using a loop and array

Code sample:

 <script language="javascript">

function checkthebox() 
{
	if(document.forms[0].elements['Select_Item[0]'].checked=true)
		{
		alert(document.forms[0].elements['Select_Item[0]'].value)
		}
	else
		{
		document.forms[0].elements['Select_Item[0]'].checked=true
		alert('The box was not checked so I have checked it!');
		}
}

</script>

  while ($count<$PageLimit){ 

echo("<INPUT onClick='checkthebox(this.value);' TYPE=CHECKBOX NAME='Select_Item[$count]' VALUE='$PartNum[$count]'>");
    }

I know that my code is a mess
please help

[devinemke]

i don't quite see why you need javascript involved in this (unless it's just for form validation). simply start a new session, move thru your multi-page form stuffing each page's form data into the session, and then proccess the data as you see fit at the end. am i missing something?

[Najjar]

Maybe you are right, I thought that I will
need javascript because I want to store the
value of the checkbox immediatly when it gets checked
because I am using Paging, moving between
pages using <a href>1, 2, ...</a>
and there is a submit button in the page
that I click at the end to finish my selection.

When moving between pages using the
HREF if I do not use sessions values of
checkboxes are lost.

If I do not need to use javascript please
let me know how to do it in PHP because
I'm probably missing something here

Thank you much for you reply.

[devinemke]

here is a very simplified example that should point you in the right direction.

<?
session_start();

function form($start, $length, $page)
{
	echo '<form action="' . $_SERVER['PHP_SELF'] . '?page=' . $page . '" method="POST">';

for ($i = $start; $i <= $length; $i++)
{
	echo '<input type="checkbox" name="checkboxes[]" value="' . $i . '"> checkbox #' . $i . '<br>';
}

echo'
<br>
<input type="submit" name="submit" value="goto next page">
</form>
';
}

if (isset($_POST['submit']))
{
	if (isset($_POST['checkboxes']))
	{
		foreach ($_POST['checkboxes'] as $value) {$_SESSION['checkboxes'][] = $value;}
	}	
}

if (!isset($_GET['page'])) {$page = 1; $_SESSION = array();}
else {$page = $_GET['page'];}

if ($page == 1) {form(1, 5, 2);}
if ($page == 2) {form(6, 10, 3);}
if ($page == 3) {form(11, 15, 4);}
if ($page == 4)
{
	if (!isset($_SESSION['checkboxes'])) {echo 'you did not checked any checkboxes';}
	else
	{
		echo 'you checked the following ' . count($_SESSION['checkboxes']) . ' checkboxes<br><br>';
		foreach ($_SESSION['checkboxes'] as $value)
		{
			echo 'checkbox #' . $value . '<br>';
		}
	}
	echo '<br><a href="' . $_SERVER['PHP_SELF'] . '">start over</a>';
}
?>

[Najjar]

Thank you so much.... 🙂

I will try that and see how this will work with me.

Thanks again.