reference a php string in jquery? - php

Question

I am using the following code to generate a random string in php, and then am storing this in my database like so:
<?php $allowance_promo = substr(str_shuffle("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"), 0, 8); ?>
I am then using my query to store this value into the database:
$query = sprintf("UPDATE internal_users SET allowance_promo = '$allowance_promo' WHERE user_id ='{$_SESSION['id']}'");
$result = mysql_query($query);
I then use another query to retrieve the value:
$query2 = sprintf("SELECT * FROM internal_users WHERE user_id ='{$_SESSION['id']}'");
$result2 = mysql_query($query2);
while ($row = mysql_fetch_array($result2)) {
$check = $row['allowance_promo'];
Then i am trying to use jquery to check if the value entered into my input field matches the one in the database like so:
<script>
$(document).ready(function() {
$('.promo_check').click(function() {
var discountCode = "<?php echo $check; ?>";
var codeEntered = $("input[name='promo']").val();
if (discountCode == codeEntered) {
$('#submit').removeAttr("disabled");
}
});
});
</script>
However i am having some difficulty getting it to work using a php string. If i use normal text like var discountCode = '123'; then it works, but when i try and use var discountCode = "<?php echo $check; ?>"; it wont work. Can someone please show me what i am doing wrong. Thanks,

Answer 1

Replace your script by the script below. Put discountCode outside the click event handler and remove $(document).ready();
<script type="text/javascript">
var discountCode = "<?php echo $allowance_promo; ?>";
$('.promo_check').click(function() {
var codeEntered = $("input[name='promo']").val();
if (discountCode == codeEntered) {
$('#submit').removeAttr("disabled");
}
});
</script>