1-get_withQuery.php

// This function simply processes a Mongo query, and returns an array of objects of the specified type. The type is saved in the _model_class
// parameter (which is saved along with the mongo data). This allows us to know which concrete subclass was saved, and how to load it again.
protected static function get_withQuery ( $query, $collection_name, $sort = null, $limit = null, $skip = null ) {
	$mongo = new MongoConnection();
	$collection = $mongo->get_db()->selectCollection( $collection_name );
	$resultCursor = $collection->find( $query );

	if ( !empty($sort) ) $resultCursor->sort( $sort );
	if ( !empty($limit) ) $resultCursor->limit( $limit );
	if ( !empty($skip) ) $resultCursor->skip( $skip );

	$results = array();

	foreach ($resultCursor as $result) {
		// ===================== SEE HERE ============================ //
		$object = MongoObjectWrapper::arrayToObject_recursive( $result, NULL, $collection_name );
		// ========================================================== //
		$object->_mongo_postLoad();

		$results[] = $object;
	}
	return $results;
}

2-arrayToObject_recursive.php

function arrayToObject_recursive ( $data, $key = NULL, $collection_name = NULL) {
	// if the passed data is just a value, return it, and terminate the recursion.
	if ( !is_array( $data ) )
		return $data; 

	// otherwise, read the class name out of the data.
	if ( array_keys($data) !== range(0, count($data) - 1) ) {
		
		if ( !is_null($collection_name) ) {
			$class = "Sibi".ucwords(rtrim($collection_name, "s"));
		} else if (array_key_exists("_id", $data)) {
			$class = ucwords($key);
		} else {
			$class = "stdClass";
		}
		

		// instantiate an object of the found class.
		$result = new $class;
		// then recursively parse it's values, and add them as fields on the object.
		foreach ($data as $key => $value) 
			$result->$key = arrayToObject_recursive( $value, $key );
	}else{
		// if no class name could be found, treat it as just a raw array.
		$result = array();
		// then recursively parse it's values, and add them as fields on the object.
		foreach ($data as $key => $value) 
			$result[$key] = arrayToObject_recursive( $value, $key );
	}

	// finally, return the structure.
	return $result;
}

3-test-cases.php

class SibiPost { 
    public $aMemberVar = 'aMemberVar Member Variable'; 
    public $aFuncName = 'aMemberFunc'; 
    
    
    function aMemberFunc() { 
        print 'Inside `aMemberFunc()`'; 
    } 
}

$arr1 = array(
	"bar" => Array("foo", "bar"),
);


$object1 = arrayToObject_recursive($arr1, NULL, "posts");

echo(get_class($object1));