Dont use this class, there is a better one (which i didnt know about), see mindlessLemmings post.
Ive written this class because I wanted to use JSON in an application I’m building, and wasn’t too keen on making it rely on yet another extension to be installed on the server.
The class can be used to encode a php array or object into JavaScript Object Notation. The class only currently supports encoding, not decoding. This is because I personally only need it for encoding, and because I’m not currently sure how to go about scripting the decoder. I defiantly want to develop a decoder at some point (hence the 0.5 version number), but I don’t currently have time to work out how to do it.
Anyway, let me know what you think.
PHP Code:
<?php
/*----------------------------------------------------------------------
PHP JSON Class
==============
The PHP JSON Class can be used to encode a php array or object into
Java Script Object Notation, without the need for an additional PHP
Extension.
Normal usage is as follows:
$json = new json;
$encoded = $json->encode($var);
echo $encoded;
Version 0.5
Copyright Jack Sleight - www.reallyshiny.com
This script is licensed under the:
Creative Commons Attribution-ShareAlike 2.5 License
----------------------------------------------------------------------*/
class json {
/*--------------------------------------------------
Encode the variable/array/object
--------------------------------------------------*/
function encode($input) {
$output = $this->get(NULL, $input);
return $output;
}
/*--------------------------------------------------
Get the encoded variable
--------------------------------------------------*/
function get($key, $value, $parent = NULL) {
$type = $this->type($key, $value);
switch ($type) {
case 'object':
$value = '{'.$this->loop($value, $type).'}';
break;
case 'array':
$value = '['.$this->loop($value, $type).']';
break;
case 'number':
$value = $value;
break;
case 'string':
$value = '"'.$this->escape($value).'"';
break;
case 'boolean':
$value = ($value) ? 'true' : 'false';
break;
case 'null':
$value = 'null';
break;
}
if(!is_null($key) && $parent != 'array')
$value = '"'.$key.'":'.$value;
return $value;
}
/*--------------------------------------------------
Check the type of the variable
--------------------------------------------------*/
function type($key, $value) {
if(is_object($value)) {
$type = 'object';
}
elseif(is_array($value)) {
if($this->is_assoc($value))
$type = 'object';
else
$type = 'array';
}
elseif(is_int($value) || is_float($value)) {
$type = 'number';
}
elseif(is_string($value)) {
$type = 'string';
}
elseif(is_bool($value)) {
$type = 'boolean';
}
elseif(is_null($value)) {
$type = 'null';
}
else {
die($key.' is of an unsupported type.');
}
return $type;
}
/*--------------------------------------------------
Loop through the array/object
--------------------------------------------------*/
function loop($input, $type) {
$output = NULL;
foreach($input as $key => $value) {
$output .= $this->get($key, $value, $type).',';
}
$output = trim($output, ',');
return $output;
}
/*--------------------------------------------------
Escape strings
--------------------------------------------------*/
function escape($string) {
$find = array('\\', '"', '/', "\b", "\f", "\n", "\r", "\t", "\u");
$repl = array('\\\\', '\"', '\/', '\b', '\f', '\n', '\r', '\t', '\u');
$string = str_replace($find, $repl, $string);
return $string;
}
/*--------------------------------------------------
Check if the array is associative
--------------------------------------------------*/
function is_assoc($array) {
krsort($array, SORT_STRING);
return !is_numeric(key($array));
}
}
?>
Usage:
PHP Code:
$json = new json;
$encoded = $json->encode($var);
echo $encoded;
I will try to keep this thread updated with any future versions, but failing that, any updates will be on my website (link in sig).
Before you post, read our: 
)
. Oh well, people should use that one then. Least i got in some more coding practice.
