ddallala/MyClassAction.php

## api.php
<?php
require('config.php');
header('Content-Type: text/javascript');

// convert API config to Ext.Direct spec
$actions = array();
foreach($API as $aname=>&$a){
	$methods = array();
	foreach($a['methods'] as $mname=>&$m){
		$md = array(
			'name'=>$mname,
			'len'=>$m['len']
		);
		if(isset($m['formHandler']) && $m['formHandler']){
			$md['formHandler'] = true;
		}
		$methods[] = $md;
	}
	$actions[$aname] = $methods;
}

$cfg = array(
    'url'=>'php/router.php',
    'type'=>'remoting',
	'actions'=>$actions
);

echo 'Ext.app.REMOTING_API = ';

echo json_encode($cfg);
echo ';';
?>

## config.php
<?php
$API = array(
	'MyClassAction'=>array(
	    'methods'=>array(
			'myFunction'=>array(
				'len'=>2
			)
	    ),
	)
);
?>

## index.html
....

<script type="text/javascript" src="php/direct/api.php"></script>
<script type="text/javascript">
      Ext.onReady(function() {
            /*-----------------------
             * Ext Direct
             ------------------------*/
            Ext.Direct.addProvider(Ext.app.REMOTING_API);


            // calling PHP function directly from ExtJs
            MyClassAction.myFunction(1,2, function(ret){
              console.debug(ret);
            },this);

            // ... your code


      });
<script>

...

## MyClassAction.php
<?php
class MyClassAction{

   /**
     * Method
     *
     * @return json
     */
	function myFunction($a,$b)
    {

		return array();
    }
}

## router.php
<?php
require('config.php');

class BogusAction {
	public $action;
	public $method;
	public $data;
	public $tid;
}

$isForm = false;
$isUpload = false;
if(isset($HTTP_RAW_POST_DATA)){
	header('Content-Type: text/javascript');
	$data = json_decode($HTTP_RAW_POST_DATA);
}else if(isset($_POST['extAction'])){ // form post
	$isForm = true;
	$isUpload = $_POST['extUpload'] == 'true';
	$data = new BogusAction();
	$data->action = $_POST['extAction'];
	$data->method = $_POST['extMethod'];
	$data->tid = $_POST['extTID'];
	$data->data = array($_POST, $_FILES);
}else{
	die('Invalid request.');
}

function doRpc($cdata){
    global $API;
	try {
		if(!isset($API[$cdata->action])){
			throw new Exception('Call to undefined action: ' . $cdata->action);
		}

		$action = $cdata->action;
		$a = $API[$action];

		doAroundCalls($a['before'], $cdata);

		$method = $cdata->method;
		$mdef = $a['methods'][$method];
		if(!$mdef){
			throw new Exception("Call to undefined method: $method on action $action");
		}
		doAroundCalls($mdef['before'], $cdata);

		$r = array(
			'type'=>'rpc',
			'tid'=>$cdata->tid,
			'action'=>$action,
			'method'=>$method
		);

		require_once("classes/$action.php");
		$o = new $action();

		$params = isset($cdata->data) && is_array($cdata->data) ? $cdata->data : array();

		$r['result'] = call_user_func_array(array($o, $method), $params);

		doAroundCalls($mdef['after'], $cdata, $r);
		doAroundCalls($a['after'], $cdata, $r);
	}
	catch(Exception $e){
		$r['type'] = 'exception';
		$r['message'] = $e->getMessage();
		$r['where'] = $e->getTraceAsString();
	}
	return $r;
}


function doAroundCalls(&$fns, &$cdata, &$returnData=null){
	if(!$fns){
		return;
	}
	if(is_array($fns)){
		foreach($fns as $f){
			$f($cdata, $returnData);
		}
	}else{
		$fns($cdata, $returnData);
	}
}

$response = null;
if(is_array($data)){
	$response = array();
	foreach($data as $d){
		$response[] = doRpc($d);
	}
}else{
	$response = doRpc($data);
}
if($isForm && $isUpload){
	echo '<html><body><textarea>';
	echo json_encode($response);
	echo '</textarea></body></html>';
}else{
	echo prepareJSON($response);
}

/*	Function to permit json encoding of javascript functions */
function prepareJSON($resp) {

	$value_arr = array();
	$replace_keys = array();

	// replacing all values defined as js functions by trailing ___ with a random number
	recursiveReplace($value_arr,$replace_keys,$resp);

	// transforming the data into json
	$encoded_json = json_encode($resp);

	// replacing the random numbers with their corresponding values from the value_array
	$encoded_json = str_replace($replace_keys,$value_arr,$encoded_json);

	return $encoded_json;

}

function recursiveReplace(&$value_arr,&$replace_keys,&$resp) {
	foreach($resp as $key => &$value){
			// if value is array recursively check for a function type
			if(is_array($value)) {
				recursiveReplace($value_arr,$replace_keys,$value);
			}
			// Look for values starting with '___'
			else if(strpos($value, '___')===0){
				$rand = rand();

				// Store function string.
				$value_arr[$rand] = substr($value,3);
				// Replace function string in $foo with a 'unique' special key.
				$value = $rand;
				// Later on, we'll look for the value, and replace it.
				$replace_keys[] = $value;
			}
	}

}
	<?php
	require('config.php');
	header('Content-Type: text/javascript');

	// convert API config to Ext.Direct spec
	$actions = array();
	foreach($API as $aname=>&$a){
	$methods = array();
	foreach($a['methods'] as $mname=>&$m){
	$md = array(
	'name'=>$mname,
	'len'=>$m['len']
	);
	if(isset($m['formHandler']) && $m['formHandler']){
	$md['formHandler'] = true;
	}
	$methods[] = $md;
	}
	$actions[$aname] = $methods;
	}

	$cfg = array(
	'url'=>'php/router.php',
	'type'=>'remoting',
	'actions'=>$actions
	);

	echo 'Ext.app.REMOTING_API = ';

	echo json_encode($cfg);
	echo ';';
	?>
	<?php
	$API = array(
	'MyClassAction'=>array(
	'methods'=>array(
	'myFunction'=>array(
	'len'=>2
	)
	),
	)
	);
	?>
	....

	<script type="text/javascript" src="php/direct/api.php"></script>
	<script type="text/javascript">
	Ext.onReady(function() {
	/*-----------------------
	* Ext Direct
	------------------------*/
	Ext.Direct.addProvider(Ext.app.REMOTING_API);


	// calling PHP function directly from ExtJs
	MyClassAction.myFunction(1,2, function(ret){
	console.debug(ret);
	},this);

	// ... your code


	});
	<script>

	...
	<?php
	class MyClassAction{

	/**
	* Method
	*
	* @return json
	*/
	function myFunction($a,$b)
	{

	return array();
	}
	}
	<?php
	require('config.php');

	class BogusAction {
	public $action;
	public $method;
	public $data;
	public $tid;
	}

	$isForm = false;
	$isUpload = false;
	if(isset($HTTP_RAW_POST_DATA)){
	header('Content-Type: text/javascript');
	$data = json_decode($HTTP_RAW_POST_DATA);
	}else if(isset($_POST['extAction'])){ // form post
	$isForm = true;
	$isUpload = $_POST['extUpload'] == 'true';
	$data = new BogusAction();
	$data->action = $_POST['extAction'];
	$data->method = $_POST['extMethod'];
	$data->tid = $_POST['extTID'];
	$data->data = array($_POST, $_FILES);
	}else{
	die('Invalid request.');
	}

	function doRpc($cdata){
	global $API;
	try {
	if(!isset($API[$cdata->action])){
	throw new Exception('Call to undefined action: ' . $cdata->action);
	}

	$action = $cdata->action;
	$a = $API[$action];

	doAroundCalls($a['before'], $cdata);

	$method = $cdata->method;
	$mdef = $a['methods'][$method];
	if(!$mdef){
	throw new Exception("Call to undefined method: $method on action $action");
	}
	doAroundCalls($mdef['before'], $cdata);

	$r = array(
	'type'=>'rpc',
	'tid'=>$cdata->tid,
	'action'=>$action,
	'method'=>$method
	);

	require_once("classes/$action.php");
	$o = new $action();

	$params = isset($cdata->data) && is_array($cdata->data) ? $cdata->data : array();

	$r['result'] = call_user_func_array(array($o, $method), $params);

	doAroundCalls($mdef['after'], $cdata, $r);
	doAroundCalls($a['after'], $cdata, $r);
	}
	catch(Exception $e){
	$r['type'] = 'exception';
	$r['message'] = $e->getMessage();
	$r['where'] = $e->getTraceAsString();
	}
	return $r;
	}


	function doAroundCalls(&$fns, &$cdata, &$returnData=null){
	if(!$fns){
	return;
	}
	if(is_array($fns)){
	foreach($fns as $f){
	$f($cdata, $returnData);
	}
	}else{
	$fns($cdata, $returnData);
	}
	}

	$response = null;
	if(is_array($data)){
	$response = array();
	foreach($data as $d){
	$response[] = doRpc($d);
	}
	}else{
	$response = doRpc($data);
	}
	if($isForm && $isUpload){
	echo '<html><body><textarea>';
	echo json_encode($response);
	echo '</textarea></body></html>';
	}else{
	echo prepareJSON($response);
	}

	/* Function to permit json encoding of javascript functions */
	function prepareJSON($resp) {

	$value_arr = array();
	$replace_keys = array();

	// replacing all values defined as js functions by trailing ___ with a random number
	recursiveReplace($value_arr,$replace_keys,$resp);

	// transforming the data into json
	$encoded_json = json_encode($resp);

	// replacing the random numbers with their corresponding values from the value_array
	$encoded_json = str_replace($replace_keys,$value_arr,$encoded_json);

	return $encoded_json;

	}

	function recursiveReplace(&$value_arr,&$replace_keys,&$resp) {
	foreach($resp as $key => &$value){
	// if value is array recursively check for a function type
	if(is_array($value)) {
	recursiveReplace($value_arr,$replace_keys,$value);
	}
	// Look for values starting with '___'
	else if(strpos($value, '___')===0){
	$rand = rand();

	// Store function string.
	$value_arr[$rand] = substr($value,3);
	// Replace function string in $foo with a 'unique' special key.
	$value = $rand;
	// Later on, we'll look for the value, and replace it.
	$replace_keys[] = $value;
	}
	}

	}