<!-- Collection of code snippets by Arne Vajhøj -->
<!-- posted to eksperten.dk, usenet and other places (2002-now) -->
<?php
$fromdb = '{"a": 123, "b": "ABC"}';
echo $fromdb . "\r\n";
$o = json_decode($fromdb, true);
$o['c'] = array('c1' => array('c1x' => array('x' => 1), 'c1y' => array('y' => 2)), 'c2' => array('c2x' => array('x' => 3), 'c2y' => array('y' => 4)));
$todb = json_encode($o);
echo $todb . "\r\n";
?>