codeingiter 1.5.4 and EXTJS 2.0.1

[eluser]olavski[/eluser]
CodeIgniter works like a dream with ExtJS.

The only thing I've done to "integrate" extjs is to set up a library class that will handle the JSON output for both php 4 and 5.

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
require "json/JSON.php";

class MY_Json extends Services_JSON{

function sendJSONsuccess($responseText = "", $data_a = "")
{
$ajax_res = array(
"responseText" => $responseText,
"success" => "true",
);

if (is_array($data_a))
$ajax_res = array_merge($ajax_res, $data_a);

$this->sendJSON($ajax_res);
}

function sendJSONfailure($responseText = "", $data_a = "")
{
$ajax_res = array(
"responseText" => $responseText,
"success" => "false",
);

if (is_array($data_a))
$ajax_res = array_merge($ajax_res, $data_a);

$this->sendJSON($ajax_res);
}

function sendJSON($json_array)
{

if (function_exists('json_encode')){
$json_str = json_encode($json_array);
}
else{
$json_str = $this->encode($json_array);
}

header("Content-length: ". strlen($json_str));
echo $json_str;
exit;
}
}
?>

Get the JSON.php class from PEAR: http://pear.php.net/pepr/pepr-proposal-show.php?id=198

Then add 'my_json' to the autoload libraries.
$autoload['libraries'] = array('database', 'my_json');

The controller function can be something like this:
function getSomeList()
{
$some_a = Array();

$query = $this->db->query("SELECT some_id, some_name FROM some_list");
foreach ($query->result_array() as $row)
$some_a[] = $row;

$ajax_res = array(
"totalCount" => count($some_a),
"some_a" => $some_a,
);

$this->my_json->sendJSON($ajax_res);
}

The ExtJS javascrip code to load that data into a data store would then be:
some_ds = new Ext.data.Store({
proxy: new Ext.data.HttpProxy({
url: 'index.php?c=lists&m=getSomeList'
}),

// create reader that reads the Topic records
reader: new Ext.data.JsonReader({
root: 'some_a',
totalProperty: 'totalCount',
id: 'some_id'
}, [
{name: 'some_id', mapping: 'some_id'},
{name: 'some_name', mapping: 'some_name'}
]),

// turn on remote sorting
remoteSort: true
});

some_ds.load();


A bit messy but hope some of this helps...