Access a PHP array using an index from javascript

[NoBullMan]

Hi,
is it possible to access an array defined in php section of a file using an index from javascript?

$arr = some_array;

n = this.option[this.selectedIndex].value;

To handle an onChange event in a listbox, I need to call a javascript function but need a value from the array that is at index j.

function show_divs(m,n)
{
var j = <?php echo $row['n']['NumIDs']?>
for (i = 1; i <= j; i++)
show ('div'+m+i');
}

[Wynder]

Meh.

I know you can do it the other way around...

<?= $num = 4; ?>

<script>
   n = <?= $num; ?>;
</script>

I can't think of a way off the top of my head to do what you're thinking.

NoBullMan wrote:

Hi,
is it possible to access an array defined in php section of a file using an index from javascript?

$arr = some_array;

n = this.option[this.selectedIndex].value;

To handle an onChange event in a listbox, I need to call a javascript function but need a value from the array that is at index j.

function show_divs(m,n)
{
var j = <?php echo $row['n']['NumIDs']?>
for (i = 1; i <= j; i++)
show ('div'+m+i');
}

[frost110]

Not possible to go from JS to PHP unless you use cookies, which would require a page reload maybe? If not than yea just do something like this:

<script>
function show_divs(m,n)
{
document.cookie = "n=" + n;

var j = <?php echo $row[$_COOKIE['n']]['NumIDs']; ?>;
for (i = 1; i <= j; i++)
show ('div'+m+i');
}
</script>

I am unsure if this would work, but hell give it a try. You may be surprised =)

--FrosT

[mmilano]

unless you were using something like AJAX to make a call back to the server, then you would have to print the PHP array to javascript.

if you had php_json installed on your system, it would be as easy as this:

<?
$myarray = array(1,2,3,4,5,6,7,8,9,0);
?>
<script language="text/javascript">
var jsarray = new Array();
jsarray = eval(<?=json_encode($myarray)?>);
</script>