arisexylightboxlite static method error - php

Question

I am using a php module in my joomla site called: Ari Sexy Lightbox Lite. I was running on php 5.3 and had to go to 5.6.
However... Since this php upgrade i am getting two errors in my page.
Deprecated: Non-static method AriJSONHelper::encode() should not be called statically, assuming $this from incompatible context in /home/deb25878n3/domains/hang-on-run.nl/public_html/plugins/content/arisexylightboxlite/arisexylightboxlite.php on line 93
Deprecated: Non-static method AriJSONHelper::_getJSONHandler() should not be called statically, assuming $this from incompatible context in /home/deb25878n3/domains/hang-on-run.nl/public_html/plugins/content/arisexylightboxlite/arisexylightboxlite/kernel/Web/JSON/class.JSONHelper.php on line 21
I tried to fix this myself but my php knowledge is way to rusty...
I really hope that someone can help solve this.
This is the code itself:
<?php
/*
* ARI Sexy Lightbox Lite Joomla! 1.5 plugin
*
* #package ARI Sexy Lightbox Lite
* #version 1.0.0
* #author ARI Soft
* #copyright Copyright (c) 2009 www.ari-soft.com. All rights reserved
* #license GNU/GPL (http://www.gnu.org/copyleft/gpl.html)
*
*/
defined('_JEXEC') or die('Restricted access');
jimport('joomla.plugin.plugin');
jimport('joomla.filter.filterinput');
require_once dirname(__FILE__) . '/arisexylightboxlite/kernel/class.AriKernel.php';
AriKernel::import('Web.JSON.JSONHelper');
class plgContentArisexylightboxlite extends JPlugin
{
/*
* Constructor
*/
function __construct(&$subject, $config)
{
parent::__construct($subject, $config);
}
function onContentPrepare($context, &$article, &$params)
{
$this->prepareContent($article, 'arisexylightboxlite');
}
function onPrepareContent(&$article, &$params, $limitstart)
{
$this->prepareContent($article);
}
function prepareContent($article, $folder = '')
{
static $loaded;
if ($loaded)
return ;
$mainframe = JFactory::getApplication();
$plgParams = $this->params;
$rel = $plgParams->get('opt_find', 'sexylightbox');
$loadAssets = $plgParams->get('loadAssets', 'auto');
if ($loadAssets == 'auto' && (empty($article->text) || !preg_match('/<[^>]*rel=("|\')?' . $rel . '(\[|"|\'| |\/)/i', $article->text)))
return ;
$document = JFactory::getDocument();
$baseUri = JURI::root(true) . '/plugins/content/' . ($folder ? $folder . '/' : '') . 'arisexylightboxlite/js/';
$loadJQuery = (bool)$plgParams->get('includeJQuery', false);
$noConflict = (bool)$plgParams->get('noConflict', true);
if ($loadJQuery)
{
$loadJQueryMethod = $plgParams->get('loadJQueryMethod', 'google_cdn');
if ($loadJQueryMethod == 'local')
{
if (J3_0)
JHtml::_('jquery.framework', $noConflict);
else
$document->addScript($baseUri . 'jquery.min.js');
}
else
{
$document->addScript('//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js');
}
if ($noConflict)
{
if (!J3_0 || $loadJQueryMethod != 'local')
$document->addScript($baseUri . 'jquery.noconflict.js');
}
}
$document->addScript($baseUri . 'jquery.easing.js');
$document->addScript($baseUri . 'jquery.sexylightbox.min.js');
$document->addStyleSheet($baseUri . 'sexylightbox.css');
$jsOptions = $this->getOptions($folder);
$document->addScriptDeclaration(
sprintf('jQuery(document).ready(function(){ SexyLightbox.initialize(%s); });',
$jsOptions ? AriJSONHelper::encode($jsOptions) : ''));
$loaded = true;
}
function getOptions($folder = '')
{
$defOptions = array(
'find' => 'sexylightbox',
'zIndex' => 32000,
'color' => 'black',
'emergefrom' => 'top',
'showDuration' => 200,
'closeDuration' => 400,
'moveDuration' => 1000,
'moveEffect' => 'easeInOutBack',
'resizeDuration' => 1000,
'resizeEffect' => 'easeInOutBack',
'shake' => array(
'distance' => 10,
'duration' => 100,
'loops' => 2,
'transition' => 'easeInOutBack'
)
);
$options = $this->getParamOptions($defOptions);
$options['dir'] = str_replace(' ', '%20', JURI::root(true) . '/plugins/content/' . ($folder ? $folder . '/' : '') . 'arisexylightboxlite/js/sexyimages');
return $options;
}
function getParamOptions($defOptions, $prefix = 'opt_')
{
$plgParams = $this->params;
$options = array();
$filter = JFilterInput::getInstance();
foreach ($defOptions as $key => $value)
{
if (is_array($value))
{
$subOptions = $this->getParamOptions($value, $prefix . $key . '_');
if (count($subOptions) > 0)
$options[$key] = $subOptions;
}
else
{
$paramValue = $plgParams->get($prefix . $key, $value);
if ($paramValue !== $value)
{
$paramValue = $filter->clean($paramValue, gettype($value));
if ($paramValue !== $value)
$options[$key] = $paramValue;
}
}
}
return $options;
}
}