Javascript / PHP question

[j1979]

<?php
$single = $_SESSION['tickets'];
var_dump($single); // This returns the integer value of 24.. (or the cost of tickets)
?>

<script type="text/javascript">

var test = "<?= $single ?>";

<b>Total: </b>£<span id="test">0</span>

// i expected this to return the same value as above (24). but the value is 0 / nul.

does anyone know what im doing wrong? (this is not the full script, but all the other code does not deal with these variables) .

[scaryjim]

I assume <?= $single ?> is equivalent to <? echo $single ?> ? Have you tried the verbose version?

The snippet above is lacking a </script>, or any method of putting the variable test into the page? Are these just typos in the snip from the full page? if not, where is the value of test meant to show in the page? If it's in the span then you'll need some javascript that does something like document.getElementById("test").innerHtml = test; (I think innerHtml is the correct property, but you can look that up on the w3 website... )

[j1979]

I assume <?= $single ?> is equivalent to <? echo $single ?> ? Have you tried the verbose version?

The snippet above is lacking a </script>, or any method of putting the variable test into the page? Are these just typos in the snip from the full page? if not, where is the value of test meant to show in the page? If it's in the span then you'll need some javascript that does something like document.getElementById("test").innerHtml = test; (I think innerHtml is the correct property, but you can look that up on the w3 website... )

nice one!! not tried it yet as the beer garden is calling.

but thanks i recon this should sort it... knowledge is power

[scaryjim]

No worries, always happy to help where possible I'm a little confused as to why you wouldn't just put

<span id="test"><?= $single ?></span>

though - do you need to use the value elsewhere in the script? Seems long winded to assign it to a variable in javascript if all you need to do is stick it in the body of the page...?

[j1979]

it turns out is was missing the semicolon ; after the PHP variable. i can't believe i didn't notice for so long.... now the script works apart from the value passed to paypal.. this line ..


<input type="hidden" name="amount" value="?????">




here is the full script.


<?php

$single = $_SESSION['tickets'];
$rate = $single + $_SESSION['services'];

?>

<script language="javascript" type="text/javascript">
var test = "<?php echo $single; ?>";
var rate = "<?php echo $rate; ?>";

var total = rate;
function priceUpdate(tog)
{
var tCheck = tog.checked;
if (tCheck)
{
total = parseInt(rate,10) + parseInt(test,10)
}
else
{
total = rate
}
tPrice = document.getElementById('totalprice');
tPrice.innerHTML = total;
}
-->
</script>
<input type="checkbox" id="chk1" onClick="priceUpdate(this)"/><b>Return Ticket</b>
<br />

<h1><b>Your Total £<span id="totalprice"><script>document.write(total);</script></span></h1><br/>



<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="GSMCxxxXD5TMA">
<input type="hidden" name="lc" value="GB">
<input type="hidden" name="item_name" value="Your Tickets">

<input type="hidden" name="amount" value="?????"> // Any idears how to get the javascript variable to pass to paypal..?

<input type="hidden" name="currency_code" value="GBP">
<input type="hidden" name="button_subtype" value="services">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="no_shipping" value="2">
<input type="hidden" name="rm" value="1">
<input type="hidden" name="return" value="http://mysite/returnpage">
<input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynowCC_LG.gif:NonHostedGuest">
<input type="image" src="https://www.paypal.com/en_US/GB/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online.">
<img alt="" border="0" src="https://www.paypal.com/en_GB/i/scr/pixel.gif" width="1" height="1">

</script>
</form>


before i had no problem passing the value when it was a PHP variable.. but now i have to send a javascript variable... i have tried so many options.

[Flash477]

Changes added in red. I added the PHP variables as the default values, as it guarantees the values exist even if the javascript doesn't run.

The <?=?> syntax shouldn't really have any spaces - hence why you needed the ;

<?php

$single = $_SESSION['tickets'];
$rate = $single + $_SESSION['services'];

?>

<script language="javascript" type="text/javascript">
var test = "<?=$single?>";
var rate = "<?=$rate?>";

var total = rate;
function priceUpdate(tog)
{
var tCheck = tog.checked;
if (tCheck)
{
total = parseInt(rate,10) + parseInt(test,10)
}
else
{
total = rate
}
tPrice = document.getElementById('totalprice');
tPrice.innerHTML = total;
document.getElementById('pp_amount').value = total;
}
-->
</script>
<input type="checkbox" id="chk1" onClick="priceUpdate(this)"/><b>Return Ticket</b>
<br />

<h1><b>Your Total £<span id="totalprice"><?=$rate?></span></h1><br/>



<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="GSMCxxxXD5TMA">
<input type="hidden" name="lc" value="GB">
<input type="hidden" name="item_name" value="Your Tickets">

<input type="hidden" name="amount" value="<?=$rate?>" id="pp_amount"> // Any idears how to get the javascript variable to pass to paypal..?

<input type="hidden" name="currency_code" value="GBP">
<input type="hidden" name="button_subtype" value="services">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="no_shipping" value="2">
<input type="hidden" name="rm" value="1">
<input type="hidden" name="return" value="http://mysite/returnpage">
<input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynowCC_LG.gif:NonHostedGuest">
<input type="image" src="https://www.paypal.com/en_US/GB/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online.">
<img alt="" border="0" src="https://www.paypal.com/en_GB/i/scr/pixel.gif" width="1" height="1">

Not needed -> </script>
</form>

[j1979]

Flash and scaryjim you are a wonderful people!!

i am truly grateful

if you're ever in Ukraine and need a train