JSON Pretty Print

<?php
function json_pretty($json, $html = false) {
$out = ''; $nl = "\n"; $cnt = 0; $tab = 4; $len = strlen($json); $space = ' ';
if($html) {
$space = ' ';
$nl = '<br/>';
}
$k = strlen($space)?strlen($space):1;
for ($i=0; $i<=$len; $i++) {
$char = substr($json, $i, 1);
if($char == '}' || $char == ']') {
$cnt --;
$out .= $nl . str_pad('', ($tab * $cnt * $k), $space);
} else if($char == '{' || $char == '[') {
$cnt ++;
}
$out .= $char;
if($char == ',' || $char == '{' || $char == '[') {
$out .= $nl . str_pad('', ($tab * $cnt * $k), $space);
}
if($char == ':') {
$out .= ' ';
}
}
return $out;
}
$arr = array('name'=>'John', 'age'=>19, 'address'=>array(array('city'=>'Nashville', 'country'=>'US')));
$json_string = json_encode($arr);
echo json_pretty($json_string, true); // Pass true as the second parameter to get the output in HTML
?>