- json_encode: documentation ( source)
<?php
$test['aaa']['bbb']['ccc'] = "ddd";
$test['aaa']['bbb']['xxx'] = "xxx";
$test['aaa']['bbb']['eee'] = "eee";
$test['bbb']['ccc']['nnn'] = "nnn";
$test['bbb']['ccc']['aaa'] = "aaa";
$test['ccc']['uuu']['ooo'] = "ooo";
$test['ccc']['uuu']['zzz'] = "zzz";
$public['aaa']['bbb']['xxx'] = $test['aaa']['bbb']['xxx'];
?>
<script type="text/javascript">
var test = <?= json_encode($public) ?>;
</script>