Palce a PHP avariable into JQuery Script

How do you place a PHP variable into a JQuey Script?
See currentAmount: below.

<?php
$gaol = "23";
?>

<script>
!function($){
$.fn.extend({
goalProgress: function(options) {
var defaults = {
goalAmount: 100,
[b]currentAmount:.'$goal'.,[/b]
speed: 1000,
textBefore: '',
textAfter: '',
milestoneNumber: 70,
milestoneClass: 'almost-full',
callback: function() {}
}

etc....

</script>

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