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Twitter LiveBlog
Updated to use the public timeline (1 post)

  1. ItsDan
    Member
    Posted 3 years ago #

    So I updated the code to use the public json timeline. I'm not an expert with Twitter so if there are drawbacks to this (aside from being limited to the 20 most recent updates) I'd love feedback. All I really changed was the URL being used but full code below:

    <?php
    /*
    Plugin Name: Twitter LiveBlog
    Plugin URI: http://www.docstrangelove.com/wordpress-plugins/
    Description: A liveblogging plugin that lets you liveblog on your WordPress blog using <a href="http://twitter.com">Twitter</a>. After activating this Plugin you must visit the <a href="options-general.php?page=twitter-liveblog.php">options page</a> and configure settings to enable liveblogging.
    Version: 1.1.2
    Author: Mashuqur Rahman
    Author URI: http://www.docstrangelove.com/about/
    */
    
    /*  Copyright 2009 Mashuqur Rahman  (email : strangelove@docstrangelove.com)
    
        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.
    
        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.
    
        You should have received a copy of the GNU General Public License
        along with this program; if not, write to the Free Software
        Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    
        This program is inspired by and benefits from the excellent
        Tweeter Tools plugin (http://alexking.org/projects/wordpress)
        written by Alex King (http://alexking.org)
    */
    
    define('MASHTLB_API_USER_TIMELINE', 'http://twitter.com/statuses/user_timeline/');
    
    register_activation_hook( __FILE__, 'mashtlb_install' );
    add_action('mashtlb_twitter_event', 'mashtlb_update_tweets');
    
    function mashtlb_install() {
    	global $wpdb;
    
    	$liveblog_install = new mashtlb_liveblog;
    
    	foreach ($liveblog_install->options as $option) {
    		add_option('mashtlb_'.$option, $liveblog_install->$option);
    	}
    	add_option('aktt_update_hash', '');
    	//update_option('mashtlb_last_tweet_created_at', gmt_from_blog_time(time()));
    
    	$liveblog_install->init();
    	$liveblog_install->schedule_next_event();
    }
    
    register_deactivation_hook(__FILE__, 'mashtlb_uninstall');
    
    function mashtlb_uninstall()
    {
    	wp_clear_scheduled_hook('mashtlb_twitter_event');
    }
    
    function mashtlb_login_test($username, $password)
    {
    	require_once(ABSPATH.WPINC.'/class-snoopy.php');
    	$snoop = new Snoopy;
    	$snoop->agent = 'Twitter LiveBlog http://www.docstrangelove.com/wordpress-plugins/';
    	//$snoop->user = $username;
    	//$snoop->pass = $password;
    	$snoop->fetch(MASHTLB_API_USER_TIMELINE . $username . '.json');
    
    	if (strpos($snoop->response_code, '200')) {
    		return ('Login succeeded, youre good to go.');
    	} else {
    		$json = new Services_JSON();
    		$results = $json->decode($snoop->results);
    		return sprintf(__('Sorry, login failed. Error message from Twitter: %s', 'twitter-tools'), $results->error);
    	}
    }
    
    function mashtlb_update_tweets() {
    
    	$liveblog = new mashtlb_liveblog;
    
    	if (!$liveblog->start_tweet_processing())
    	{
    		return;
    	}
    
    	require_once(ABSPATH.WPINC.'/class-snoopy.php');
    	$snoop = new Snoopy;
    	$snoop->agent = 'Twitter LiveBlog http://www.docstrangelove.com/wordpress-plugins/';
    	//$snoop->user = $liveblog->twitter_username;
    	//$snoop->pass = $liveblog->twitter_password;
    	$snoop->fetch(MASHTLB_API_USER_TIMELINE . $liveblog->twitter_username . '.json');
    
    	if (!strpos($snoop->response_code, '200'))
    	{
    		$liveblog->end_tweet_processing();
    		return;
    	}
    	echo 'd';
    
    	$data = $snoop->results;
    	echo '!' . var_dump($data);
    
    	if (!$liveblog->is_new_tweets($data))
    	{
    		$liveblog->end_tweet_processing();
    		return;
    	}
    
    	$json = new Services_JSON();
    	$tweets = array_reverse($json->decode($data));
    
    	if (is_array($tweets) && count($tweets) > 0) {
    		foreach ($tweets as $tw_data)
    		{
    			if (empty($tw_data->in_reply_to_status_id))
    			{
    				$tweet = new mashtlb_tweet($tw_data->id, $tw_data->text);
    				$tweet->tw_created_at = $tweet->twdate_to_time($tw_data->created_at);
    
    				if($tweet->tw_created_at > $liveblog->last_tweet_created_at)
    				{
    					if($liveblog->is_liveblogging())
    					{
    
    						if(strstr($tweet->tw_text, '//NLB//'))
    						{
    							$liveblog->end_post($tweet);
    							$liveblog->start_new_post($tweet);
    						}
    						else if(strstr($tweet->tw_text, '//ELB//'))
    						{
    							$liveblog->end_post($tweet);
    						}
    						else
    						{
    							$liveblog->add_tweet($tweet);
    						}
    
    					}
    					else
    					{
    						if(strstr($tweet->tw_text, '//NLB//'))
    						{
    							$liveblog->start_new_post($tweet);
    
    						}
    					}
    				}
    			}
    		}
    
    		if($liveblog->is_liveblogging())
    		{
    			$liveblog->save_post();
    		}
    	}
    	$liveblog->end_tweet_processing();
    }
    
    function mashtlb_tweets_check()
    {
    		print('<br>Testing Testing');
    
      mashtlb_update_tweets();
      print('<br>Testing Testing');
    }
    
    class mashtlb_liveblog
    {
    	function mashtlb_liveblog()
    	{
    		$this->options = array
    		(
    			'twitter_username'
    			,'twitter_password'
    			,'blog_post_tags'
    			,'blog_post_author'
    			,'blog_post_category'
    			,'twitter_interval'
    			,'twitter_liveblog_interval'
    			,'time_format'
    			,'tweet_prefix'
    			,'update_hash'
    			,'last_tweet_download'
    			,'doing_tweet_download'
    			,'liveblog_post_id'
    			,'last_tweet_id'
    			,'last_tweet_text'
    			,'last_tweet_created_at'
    		);
    
    		$this->twitter_username = '';
    		$this->twitter_password = '';
    		$this->blog_post_tags = '';
    		$this->blog_post_author = '1';
    		$this->blog_post_category = '1';
    		$this->twitter_interval = '10';
    		$this->twitter_liveblog_interval = '2';
    		$this->time_format = 'g:i:s A';
    		$this->tweet_prefix = '';
    
    		$this->update_hash = '';
    		$this->last_tweet_download = '';
    		$this->doing_tweet_download = '0';
    
    		$this->liveblog_post_id = '';
    		$this->last_tweet_id = '0';
    		$this->last_tweet_text = '';
    		$this->last_tweet_created_at = '';
    
    		$this->tweet_text = '';
    	}
    
    	function init()
    	{
    		foreach ($this->options as $option)
    		{
    			$this->$option = get_option('mashtlb_'.$option);
    		}
    	}
    
    	function schedule_next_event()
    	{
    		wp_clear_scheduled_hook('mashtlb_twitter_event');
    		wp_schedule_single_event(time()+ $this->tweet_download_interval(), 'mashtlb_twitter_event');
    	}
    
    	function populate_settings()
    	{
    		foreach ($this->options as $option)
    		{
    			if (isset($_POST['mashtlb_'.$option]))
    			{
    				$this->$option = stripslashes($_POST['mashtlb_'.$option]);
    			}
    		}
    	}
    
    	function update_settings()
    	{
    		foreach ($this->options as $option)
    		{
    			update_option('mashtlb_'.$option, $this->$option);
    		}
    	}
    
    	function start_new_post($tweet)
    	{
    		if ($this->last_tweet_created_at < $tweet->tw_created_at)
    		{
    
    			$this->liveblog_post_id = $this->insert_new_post($this->get_post_title($tweet->tw_text));
    			$this->last_tweet_id = $tweet->tw_id;
    			$this->last_tweet_text = $tweet->tw_text;
    			$this->last_tweet_created_at = $tweet->tw_created_at;
    
    			update_option('mashtlb_liveblog_post_id', $this->liveblog_post_id);
    			update_option('mashtlb_last_tweet_id', $this->last_tweet_id);
    			update_option('mashtlb_last_tweet_text', $this->last_tweet_text);
    			update_option('mashtlb_last_tweet_created_at', $this->last_tweet_created_at);
    
    		}
    	}
    
    	function insert_new_post($title)
    	{
    		global $wpdb;
    
    		$post_data = array(
    			'post_content' => $wpdb->escape(''),
    			'post_title' => $wpdb->escape($title),
    			'post_category' => array($this->blog_post_category),
    			'post_status' => 'draft',
    			'post_author' => $wpdb->escape($this->blog_post_author)
    		);
    
    		$post_id = wp_insert_post($post_data);
    		add_post_meta($post_id, 'aktt_tweeted', '1', true); // to prevent Twitter Tools from notifying Twitter
    		wp_set_post_tags($post_id, $this->blog_post_tags);
    		wp_publish_post($post_id);
    		return $post_id;
    	}
    
    	function get_post_title($post_title)
    	{
    		if (strlen($post_title) > 7)
    		{
    			return trim(substr($post_title, 7));
    		}
    
    		return $this->default_post_title();
    
    	}
    
    	function default_post_title()
    	{
    		return 'Live Blogging';
    	}
    
    	function end_post($tweet)
    	{
    		//
    		// Write buffered tweets to the post
    		//
    		$this->save_post();
    
    		$this->liveblog_post_id = '';
    		$this->last_tweet_id = $tweet->tw_id;
    		$this->last_tweet_text = $tweet->tw_text;
    		$this->last_tweet_created_at = $tweet->tw_created_at;
    
    		update_option('mashtlb_liveblog_post_id', '');
    		update_option('mashtlb_last_tweet_id', $this->last_tweet_id);
    		update_option('mashtlb_last_tweet_text', $this->last_tweet_text);
    		update_option('mashtlb_last_tweet_created_at', $this->last_tweet_created_at);
    
    	}
    
    	function add_tweet($tweet)
    	{
    			$this->last_tweet_id = $tweet->tw_id;
    			$this->last_tweet_text = $tweet->tw_text;
    			$this->last_tweet_created_at = $tweet->tw_created_at;
    			update_option('mashtlb_last_tweet_id', $this->last_tweet_id);
    			update_option('mashtlb_last_tweet_text', $this->last_tweet_text);
    			update_option('mashtlb_last_tweet_created_at', $this->last_tweet_created_at);
    
    			$this->tweet_text = $this->tweet_text.'<br><strong>'.date($this->get_time_format(), blog_time_from_gmt($this->last_tweet_created_at)).'</strong>: '.make_clickable($tweet->tw_text).'<br/>';
    	}
    
    	function get_time_format()
    	{
    		if (strlen($this->time_format) == 0)
    		{
    			return 'g:i:s A';
    		}
    
    		return $this->time_format;
    	}
    
    	function is_liveblogging()
    	{
    		if (strlen($this->liveblog_post_id) == 0)
    		{
    			return false;
    		}
    
    		return true;
    	}
    
    	function save_post()
    	{
    		global $wpdb;
    		$post_data = get_post($this->liveblog_post_id);
    		$previous_post_content = $post_data->post_content;
    
    		$post_data = array(
    			'ID' => $this->liveblog_post_id,
    			'post_content' => $wpdb->escape($previous_post_content . $this->tweet_text)
    		);
    		wp_update_post($post_data);
    
    		//
    		// Empty the tweet buffer
    		//
    		$this->tweet_text = '';
    	}
    
    	function is_new_tweets($data)
    	{
    		$hash = md5($data);
    		if ($hash == $this->update_hash)
    		{
    			update_option('mashtlb_last_tweet_download', time());
    			update_option('mashtlb_doing_tweet_download', '0');
    
    			return false;
    		}
    
    		update_option('mashtlb_update_hash', $hash);
    		return true;
    	}
    
    	function tweet_download_interval()
    	{
    		if ($this->is_liveblogging())
    		{
    			return (intval(get_option('mashtlb_twitter_liveblog_interval'))*60);
    		}
    		return (intval(get_option('mashtlb_twitter_interval'))*60);
    	}
    
    	function start_tweet_processing()
    	{
    		$this->init();
    		$this->schedule_next_event();
    
    		// check to see if username and password have been set
    		if (empty($this->twitter_username) || empty($this->twitter_password))
    		{
    			return false;
    		}
    
    		// let the last update run for interval minutes
    
    		if (time() - intval(get_option('mashtlb_doing_tweet_download')) < $this->tweet_download_interval())
    		{
    			return false;
    		}
    
    		/*
    		// wait interval between downloads
    		if (time() - intval(get_option('mashtlb_last_tweet_download')) < $this->tweet_download_interval())
    		{
    			return false;
    		}
    		*/
    
    		update_option('mashtlb_doing_tweet_download', time());
    
    		return true;
    	}
    
    	function end_tweet_processing()
    	{
    		update_option('mashtlb_last_tweet_download', time());
    		update_option('mashtlb_doing_tweet_download', '0');
    	}
    }
    
    function blog_time_from_gmt($gmttime)
    {
    	return $gmttime + (get_option('gmt_offset') * 3600);
    }
    
    function gmt_from_blog_time($blogtime)
    {
    	return $blogtime - (get_option('gmt_offset') * 3600);
    }
    
    class mashtlb_tweet {
    	function mashtlb_tweet(
    		$tw_id = ''
    		, $tw_text = ''
    		, $tw_created_at = ''
    	)
          {
    		$this->tw_created_at = $tw_created_at;
    		$this->tw_text = $tw_text;
    		$this->tw_id = $tw_id;
    	}
    
    	function twdate_to_time($date) {
    		$parts = explode(' ', $date);
    		$date = strtotime($parts[1].' '.$parts[2].', '.$parts[5].' '.$parts[3]);
    		return $date;
    	}
    
    }
    
    // Create a option page for settings
    add_action('admin_menu', 'add_mashtlb_option_page' );
    
    // Hook in the options page function
    function add_mashtlb_option_page()
    {
    	global $wpdb;
    	add_options_page('Twitter LiveBlog Options', 'Twitter LiveBlog', 8, basename(__FILE__), 'mashtlb_options_page');
    }
    
    function mashtlb_options_page()
    {
    
    	$liveblog = new mashtlb_liveblog;
    	$liveblog->init();
    
    	$updated_text = '';
    
    	if ( isset( $_POST['mashtlb_update_settings'] ) )
    	{
    		$liveblog->populate_settings();
    		$liveblog->update_settings();
    
    		//
    		// Set up scheduled event to check for tweets. The first check does not occur until
    		// options are saved. Each subsequent event is scheduled during the next twitter check.
    		$liveblog->schedule_next_event();
    
    		$updated_text = '<div class="updated"><p><strong>Twitter LiveBlog options updated.</strong></p></div>';
    	//	wp_redirect(get_bloginfo('wpurl').'/wp-admin/options-general.php?page=twitter-liveblog.php&updated=true');
    	//	die();
    	}
    
    	$categories = get_categories('hide_empty=0');
    	$cat_options = '';
    	foreach ($categories as $category)
    	{
    		// WP < 2.3 compatibility
    		!empty($category->term_id) ? $cat_id = $category->term_id : $cat_id = $category->cat_ID;
    		!empty($category->name) ? $cat_name = $category->name : $cat_name = $category->cat_name;
    		if ($cat_id == $liveblog->blog_post_category)
    		{
    			$selected = 'selected="selected"';
    		}
    		else
    		{
    			$selected = '';
    		}
    		$cat_options .= "\n\t<option value='$cat_id' $selected>$cat_name</option>";
    	}
    
    	$authors = get_users_of_blog();
    	$author_options = '';
    	foreach ($authors as $user) {
    		$usero = new WP_User($user->user_id);
    		$author = $usero->data;
    		// Only list users who are allowed to publish
    		if (! $usero->has_cap('publish_posts'))
    		{
    			continue;
    		}
    		if ($author->ID == $liveblog->blog_post_author)
    		{
    			$selected = 'selected="selected"';
    		}
    		else {
    			$selected = '';
    		}
    		$author_options .= "\n\t<option value='$author->ID' $selected>$author->user_nicename</option>";
    	}
    
    	$twitter_intervals = array('2','5','10','15','30');
    	$twitter_interval_options = '';
    	foreach ($twitter_intervals as $twitter_interval) {
    		if ($twitter_interval == $liveblog->twitter_interval)
    		{
    			$selected = 'selected="selected"';
    		}
    		else {
    			$selected = '';
    		}
    		$twitter_interval_options .= "\n\t<option value='$twitter_interval' $selected>$twitter_interval</option>";
    	}
    
    	$twitter_liveblog_intervals = array('1','2','3','4','5','10','15','30');
    	$twitter_liveblog_interval_options = '';
    	foreach ($twitter_liveblog_intervals as $twitter_liveblog_interval) {
    		if ($twitter_liveblog_interval == $liveblog->twitter_liveblog_interval)
    		{
    			$selected = 'selected="selected"';
    		}
    		else {
    			$selected = '';
    		}
    		$twitter_liveblog_interval_options .= "\n\t<option value='$twitter_liveblog_interval' $selected>$twitter_liveblog_interval</option>";
    	}
    
    	print('
    			<style type="text/css">
    					#mashtlb_twitterliveblog .options {
    						overflow: hidden;
    						border: none;
    					}
    					#mashtlb_twitterliveblog .option {
    						overflow: hidden;
    						border-bottom: solid 1px #ccc;
    						padding-bottom: 9px;
    						padding-top: 9px;
    					}
    					#mashtlb_twitterliveblog .option label {
    						display: block;
    						float: left;
    						width: 200px;
    						margin-right: 24px;
    						text-align: right;
    					}
    					#mashtlb_twitterliveblog .option span {
    						display: block;
    						float: left;
    						margin-left: 230px;
    						margin-top: 6px;
    						clear: left;
    					}
    					#mashtlb_twitterliveblog select,
    					#mashtlb_twitterliveblog input {
    						float: left;
    						display: block;
    						margin-right: 6px;
    					}
    					#mashtlb_twitterliveblog p.submit {
    						overflow: hidden;
    					}
    					#mashtlb_twitterliveblog .option span {
    						color: #666;
    						display: block;
    					}
    			</style>
    
    			<div class="wrap" id="mashtlb_options_page">
    				<h2>'.__('Twitter LiveBlog Options', 'twitter-liveblog').'</h2>
    				'.$updated_text.'
    				<form id="mashtlb_twitterliveblog" name="mashtlb_twitterliveblog" action="'.get_bloginfo('wpurl').'/wp-admin/options-general.php?page=twitter-liveblog.php" method="post">
    					<fieldset class="options">
    						<div class="option">
    							<label for="mashtlb_twitter_username">'.__('Twitter Username', 'twitter-liveblog').'/'.__('Password', 'twitter-liveblog').'</label>
    							<input type="text" size="25" name="mashtlb_twitter_username" id="mashtlb_twitter_username" value="'.$liveblog->twitter_username.'" autocomplete="off" />
    							<input type="password" size="25" name="mashtlb_twitter_password" id="mashtlb_twitter_password" value="'.$liveblog->twitter_password.'" autocomplete="off" />
    						</div>
    
    						<div class="option">
    							<label for="mashtlb_blog_post_category">'.__('Category for liveblog posts:', 'twitter-liveblog').'</label>
    							<select name="mashtlb_blog_post_category" id="mashtlb_blog_post_category">'.$cat_options.'</select>
    						</div>
    						<div class="option">
    							<label for="mashtlb_blog_post_tags">'.__('Tag(s) for liveblog posts:', 'twitter-liveblog').'</label>
    							<input name="mashtlb_blog_post_tags" id="mashtlb_blog_post_tags" value="'.$liveblog->blog_post_tags.'">
    							<span>'._('Separate multiple tags with commas.').'</span>
    						</div>
    						<div class="option">
    							<label for="mashtlb_blog_post_author">'.__('Author for liveblog posts:', 'twitter-liveblog').'</label>
    							<select name="mashtlb_blog_post_author" id="mashtlb_blog_post_author">'.$author_options.'</select>
    						</div>
    						<div class="option">
    							<label for="mashtlb_twitter_interval">'.__('Check Twitter for new liveblog posts (in minutes):', 'twitter-liveblog').'</label>
    							<select name="mashtlb_twitter_interval" id="mashtlb_twitter_interval">'.$twitter_interval_options.'</select>
    						</div>
    						<div class="option">
    							<label for="mashtlb_twitter_liveblog_interval">'.__('Check Twitter during liveblog (in minutes):', 'twitter-liveblog').'</label>
    							<select name="mashtlb_twitter_liveblog_interval" id="mashtlb_twitter_liveblog_interval">'.$twitter_liveblog_interval_options.'</select>
    						</div>
    					</fieldset>
    					<p class="submit">
    						<input type="submit" name="mashtlb_update_settings" value="Update Options" />
    					</p>
    				</form>
    			</div>
    	');
    }
    
    if (!class_exists('Services_JSON'))
    {
    
    // PEAR JSON class
    
    /**
    * Converts to and from JSON format.
    *
    * JSON (JavaScript Object Notation) is a lightweight data-interchange
    * format. It is easy for humans to read and write. It is easy for machines
    * to parse and generate. It is based on a subset of the JavaScript
    * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
    * This feature can also be found in  Python. JSON is a text format that is
    * completely language independent but uses conventions that are familiar
    * to programmers of the C-family of languages, including C, C++, C#, Java,
    * JavaScript, Perl, TCL, and many others. These properties make JSON an
    * ideal data-interchange language.
    *
    * This package provides a simple encoder and decoder for JSON notation. It
    * is intended for use with client-side Javascript applications that make
    * use of HTTPRequest to perform server communication functions - data can
    * be encoded into JSON notation for use in a client-side javascript, or
    * decoded from incoming Javascript requests. JSON format is native to
    * Javascript, and can be directly eval()'ed with no further parsing
    * overhead
    *
    * All strings should be in ASCII or UTF-8 format!
    *
    * LICENSE: Redistribution and use in source and binary forms, with or
    * without modification, are permitted provided that the following
    * conditions are met: Redistributions of source code must retain the
    * above copyright notice, this list of conditions and the following
    * disclaimer. Redistributions in binary form must reproduce the above
    * copyright notice, this list of conditions and the following disclaimer
    * in the documentation and/or other materials provided with the
    * distribution.
    *
    * THIS SOFTWARE IS PROVIDED <code></code>AS IS'' AND ANY EXPRESS OR IMPLIED
    * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
    * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
    * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
    * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
    * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
    * DAMAGE.
    *
    * @category
    * @package     Services_JSON
    * @author      Michal Migurski <mike-json@teczno.com>
    * @author      Matt Knapp <mdknapp[at]gmail[dot]com>
    * @author      Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
    * @copyright   2005 Michal Migurski
    * @version     CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $
    * @license     http://www.opensource.org/licenses/bsd-license.php
    * @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
    */
    
    /**
    * Marker constant for Services_JSON::decode(), used to flag stack state
    */
    define('SERVICES_JSON_SLICE',   1);
    
    /**
    * Marker constant for Services_JSON::decode(), used to flag stack state
    */
    define('SERVICES_JSON_IN_STR',  2);
    
    /**
    * Marker constant for Services_JSON::decode(), used to flag stack state
    */
    define('SERVICES_JSON_IN_ARR',  3);
    
    /**
    * Marker constant for Services_JSON::decode(), used to flag stack state
    */
    define('SERVICES_JSON_IN_OBJ',  4);
    
    /**
    * Marker constant for Services_JSON::decode(), used to flag stack state
    */
    define('SERVICES_JSON_IN_CMT', 5);
    
    /**
    * Behavior switch for Services_JSON::decode()
    */
    define('SERVICES_JSON_LOOSE_TYPE', 16);
    
    /**
    * Behavior switch for Services_JSON::decode()
    */
    define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
    
    /**
    * Converts to and from JSON format.
    *
    * Brief example of use:
    *
    * <code>
    * // create a new instance of Services_JSON
    * $json = new Services_JSON();
    *
    * // convert a complexe value to JSON notation, and send it to the browser
    * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
    * $output = $json->encode($value);
    *
    * print($output);
    * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
    *
    * // accept incoming POST data, assumed to be in JSON notation
    * $input = file_get_contents('php://input', 1000000);
    * $value = $json->decode($input);
    * </code>
    */
    class Services_JSON
    {
       /**
        * constructs a new JSON instance
        *
        * @param    int     $use    object behavior flags; combine with boolean-OR
        *
        *                           possible values:
        *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
        *                                   "{...}" syntax creates associative arrays
        *                                   instead of objects in decode().
        *                           - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
        *                                   Values which can't be encoded (e.g. resources)
        *                                   appear as NULL instead of throwing errors.
        *                                   By default, a deeply-nested resource will
        *                                   bubble up with an error, so all return values
        *                                   from encode() should be checked with isError()
        */
        function Services_JSON($use = 0)
        {
            $this->use = $use;
        }
    
     /**
        * convert a string from one UTF-16 char to one UTF-8 char
        *
        * Normally should be handled by mb_convert_encoding, but
        * provides a slower PHP-only method for installations
        * that lack the multibye string extension.
        *
        * @param    string  $utf16  UTF-16 character
        * @return   string  UTF-8 character
        * @access   private
        */
        function utf162utf8($utf16)
        {
            // oh please oh please oh please oh please oh please
            if(function_exists('mb_convert_encoding')) {
                return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
            }
    
            $bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
    
            switch(true) {
                case ((0x7F & $bytes) == $bytes):
                    // this case should never be reached, because we are in ASCII range
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return chr(0x7F & $bytes);
    
                case (0x07FF & $bytes) == $bytes:
                    // return a 2-byte UTF-8 character
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return chr(0xC0 | (($bytes >> 6) & 0x1F))
                         . chr(0x80 | ($bytes & 0x3F));
    
                case (0xFFFF & $bytes) == $bytes:
                    // return a 3-byte UTF-8 character
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return chr(0xE0 | (($bytes >> 12) & 0x0F))
                         . chr(0x80 | (($bytes >> 6) & 0x3F))
                         . chr(0x80 | ($bytes & 0x3F));
            }
    
            // ignoring UTF-32 for now, sorry
            return '';
        }
    
       /**
        * convert a string from one UTF-8 char to one UTF-16 char
        *
        * Normally should be handled by mb_convert_encoding, but
        * provides a slower PHP-only method for installations
        * that lack the multibye string extension.
        *
        * @param    string  $utf8   UTF-8 character
        * @return   string  UTF-16 character
        * @access   private
        */
        function utf82utf16($utf8)
        {
            // oh please oh please oh please oh please oh please
            if(function_exists('mb_convert_encoding')) {
                return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
            }
    
            switch(strlen($utf8)) {
                case 1:
                    // this case should never be reached, because we are in ASCII range
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return $utf8;
    
                case 2:
                    // return a UTF-16 character from a 2-byte UTF-8 char
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return chr(0x07 & (ord($utf8{0}) >> 2))
                         . chr((0xC0 & (ord($utf8{0}) << 6))
                             | (0x3F & ord($utf8{1})));
    
                case 3:
                    // return a UTF-16 character from a 3-byte UTF-8 char
                    // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                    return chr((0xF0 & (ord($utf8{0}) << 4))
                             | (0x0F & (ord($utf8{1}) >> 2)))
                         . chr((0xC0 & (ord($utf8{1}) << 6))
                             | (0x7F & ord($utf8{2})));
            }
    
            // ignoring UTF-32 for now, sorry
            return '';
        }
    
       /**
        * encodes an arbitrary variable into JSON format
        *
        * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
        *                           see argument 1 to Services_JSON() above for array-parsing behavior.
        *                           if var is a strng, note that encode() always expects it
        *                           to be in ASCII or UTF-8 format!
        *
        * @return   mixed   JSON string representation of input var or an error if a problem occurs
        * @access   public
        */
        function encode($var)
        {
            switch (gettype($var)) {
                case 'boolean':
                    return $var ? 'true' : 'false';
    
                case 'NULL':
                    return 'null';
    
                case 'integer':
                    return (int) $var;
    
                case 'double':
                case 'float':
                    return (float) $var;
    
                case 'string':
                    // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
                    $ascii = '';
                    $strlen_var = strlen($var);
    
                   /*
                    * Iterate over every character in the string,
                    * escaping with a slash or encoding to UTF-8 where necessary
                    */
                    for ($c = 0; $c < $strlen_var; ++$c) {
    
                        $ord_var_c = ord($var{$c});
    
                        switch (true) {
                            case $ord_var_c == 0x08:
                                $ascii .= '\b';
                                break;
                            case $ord_var_c == 0x09:
                                $ascii .= '\t';
                                break;
                            case $ord_var_c == 0x0A:
                                $ascii .= '\n';
                                break;
                            case $ord_var_c == 0x0C:
                                $ascii .= '\f';
                                break;
                            case $ord_var_c == 0x0D:
                                $ascii .= '\r';
                                break;
    
                            case $ord_var_c == 0x22:
                            case $ord_var_c == 0x2F:
                            case $ord_var_c == 0x5C:
                                // double quote, slash, slosh
                                $ascii .= '\\'.$var{$c};
                                break;
    
                            case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
                                // characters U-00000000 - U-0000007F (same as ASCII)
                                $ascii .= $var{$c};
                                break;
    
                            case (($ord_var_c & 0xE0) == 0xC0):
                                // characters U-00000080 - U-000007FF, mask 110XXXXX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
                                $c += 1;
                                $utf16 = $this->utf82utf16($char);
                                $ascii .= sprintf('\u%04s', bin2hex($utf16));
                                break;
    
                            case (($ord_var_c & 0xF0) == 0xE0):
                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                $char = pack('C*', $ord_var_c,
                                             ord($var{$c + 1}),
                                             ord($var{$c + 2}));
                                $c += 2;
                                $utf16 = $this->utf82utf16($char);
                                $ascii .= sprintf('\u%04s', bin2hex($utf16));
                                break;
    
                            case (($ord_var_c & 0xF8) == 0xF0):
                                // characters U-00010000 - U-001FFFFF, mask 11110XXX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                $char = pack('C*', $ord_var_c,
                                             ord($var{$c + 1}),
                                             ord($var{$c + 2}),
                                             ord($var{$c + 3}));
                                $c += 3;
                                $utf16 = $this->utf82utf16($char);
                                $ascii .= sprintf('\u%04s', bin2hex($utf16));
                                break;
    
                            case (($ord_var_c & 0xFC) == 0xF8):
                                // characters U-00200000 - U-03FFFFFF, mask 111110XX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                $char = pack('C*', $ord_var_c,
                                             ord($var{$c + 1}),
                                             ord($var{$c + 2}),
                                             ord($var{$c + 3}),
                                             ord($var{$c + 4}));
                                $c += 4;
                                $utf16 = $this->utf82utf16($char);
                                $ascii .= sprintf('\u%04s', bin2hex($utf16));
                                break;
    
                            case (($ord_var_c & 0xFE) == 0xFC):
                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                $char = pack('C*', $ord_var_c,
                                             ord($var{$c + 1}),
                                             ord($var{$c + 2}),
                                             ord($var{$c + 3}),
                                             ord($var{$c + 4}),
                                             ord($var{$c + 5}));
                                $c += 5;
                                $utf16 = $this->utf82utf16($char);
                                $ascii .= sprintf('\u%04s', bin2hex($utf16));
                                break;
                        }
                    }
    
                    return '"'.$ascii.'"';
    
                case 'array':
                   /*
                    * As per JSON spec if any array key is not an integer
                    * we must treat the the whole array as an object. We
                    * also try to catch a sparsely populated associative
                    * array with numeric keys here because some JS engines
                    * will create an array with empty indexes up to
                    * max_index which can cause memory issues and because
                    * the keys, which may be relevant, will be remapped
                    * otherwise.
                    *
                    * As per the ECMA and JSON specification an object may
                    * have any string as a property. Unfortunately due to
                    * a hole in the ECMA specification if the key is a
                    * ECMA reserved word or starts with a digit the
                    * parameter is only accessible using ECMAScript's
                    * bracket notation.
                    */
    
                    // treat as a JSON object
                    if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
                        $properties = array_map(array($this, 'name_value'),
                                                array_keys($var),
                                                array_values($var));
    
                        foreach($properties as $property) {
                            if(Services_JSON::isError($property)) {
                                return $property;
                            }
                        }
    
                        return '{' . join(',', $properties) . '}';
                    }
    
                    // treat it like a regular array
                    $elements = array_map(array($this, 'encode'), $var);
    
                    foreach($elements as $element) {
                        if(Services_JSON::isError($element)) {
                            return $element;
                        }
                    }
    
                    return '[' . join(',', $elements) . ']';
    
                case 'object':
                    $vars = get_object_vars($var);
    
                    $properties = array_map(array($this, 'name_value'),
                                            array_keys($vars),
                                            array_values($vars));
    
                    foreach($properties as $property) {
                        if(Services_JSON::isError($property)) {
                            return $property;
                        }
                    }
    
                    return '{' . join(',', $properties) . '}';
    
                default:
                    return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
                        ? 'null'
                        : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
            }
        }
    
       /**
        * array-walking function for use in generating JSON-formatted name-value pairs
        *
        * @param    string  $name   name of key to use
        * @param    mixed   $value  reference to an array element to be encoded
        *
        * @return   string  JSON-formatted name-value pair, like '"name":value'
        * @access   private
        */
        function name_value($name, $value)
        {
            $encoded_value = $this->encode($value);
    
            if(Services_JSON::isError($encoded_value)) {
                return $encoded_value;
            }
    
            return $this->encode(strval($name)) . ':' . $encoded_value;
        }
    
       /**
        * reduce a string by removing leading and trailing comments and whitespace
        *
        * @param    $str    string      string value to strip of comments and whitespace
        *
        * @return   string  string value stripped of comments and whitespace
        * @access   private
        */
        function reduce_string($str)
        {
            $str = preg_replace(array(
    
                    // eliminate single line comments in '// ...' form
                    '#^\s*//(.+)$#m',
    
                    // eliminate multi-line comments in '/* ... */' form, at start of string
                    '#^\s*/\*(.+)\*/#Us',
    
                    // eliminate multi-line comments in '/* ... */' form, at end of string
                    '#/\*(.+)\*/\s*$#Us'
    
                ), '', $str);
    
            // eliminate extraneous space
            return trim($str);
        }
    
       /**
        * decodes a JSON string into appropriate variable
        *
        * @param    string  $str    JSON-formatted string
        *
        * @return   mixed   number, boolean, string, array, or object
        *                   corresponding to given JSON input string.
        *                   See argument 1 to Services_JSON() above for object-output behavior.
        *                   Note that decode() always returns strings
        *                   in ASCII or UTF-8 format!
        * @access   public
        */
        function decode($str)
        {
            $str = $this->reduce_string($str);
    
            switch (strtolower($str)) {
                case 'true':
                    return true;
    
                case 'false':
                    return false;
    
                case 'null':
                    return null;
    
                default:
                    $m = array();
    
                    if (is_numeric($str)) {
                        // Lookie-loo, it's a number
    
                        // This would work on its own, but I'm trying to be
                        // good about returning integers where appropriate:
                        // return (float)$str;
    
                        // Return float or int, as appropriate
                        return ((float)$str == (integer)$str)
                            ? (integer)$str
                            : (float)$str;
    
                    } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
                        // STRINGS RETURNED IN UTF-8 FORMAT
                        $delim = substr($str, 0, 1);
                        $chrs = substr($str, 1, -1);
                        $utf8 = '';
                        $strlen_chrs = strlen($chrs);
    
                        for ($c = 0; $c < $strlen_chrs; ++$c) {
    
                            $substr_chrs_c_2 = substr($chrs, $c, 2);
                            $ord_chrs_c = ord($chrs{$c});
    
                            switch (true) {
                                case $substr_chrs_c_2 == '\b':
                                    $utf8 .= chr(0x08);
                                    ++$c;
                                    break;
                                case $substr_chrs_c_2 == '\t':
                                    $utf8 .= chr(0x09);
                                    ++$c;
                                    break;
                                case $substr_chrs_c_2 == '\n':
                                    $utf8 .= chr(0x0A);
                                    ++$c;
                                    break;
                                case $substr_chrs_c_2 == '\f':
                                    $utf8 .= chr(0x0C);
                                    ++$c;
                                    break;
                                case $substr_chrs_c_2 == '\r':
                                    $utf8 .= chr(0x0D);
                                    ++$c;
                                    break;
    
                                case $substr_chrs_c_2 == '\\"':
                                case $substr_chrs_c_2 == '\\\'':
                                case $substr_chrs_c_2 == '\\\\':
                                case $substr_chrs_c_2 == '\\/':
                                    if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
                                       ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
                                        $utf8 .= $chrs{++$c};
                                    }
                                    break;
    
                                case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
                                    // single, escaped unicode character
                                    $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
                                           . chr(hexdec(substr($chrs, ($c + 4), 2)));
                                    $utf8 .= $this->utf162utf8($utf16);
                                    $c += 5;
                                    break;
    
                                case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
                                    $utf8 .= $chrs{$c};
                                    break;
    
                                case ($ord_chrs_c & 0xE0) == 0xC0:
                                    // characters U-00000080 - U-000007FF, mask 110XXXXX
                                    //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                    $utf8 .= substr($chrs, $c, 2);
                                    ++$c;
                                    break;
    
                                case ($ord_chrs_c & 0xF0) == 0xE0:
                                    // characters U-00000800 - U-0000FFFF, mask 1110XXXX
                                    // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                    $utf8 .= substr($chrs, $c, 3);
                                    $c += 2;
                                    break;
    
                                case ($ord_chrs_c & 0xF8) == 0xF0:
                                    // characters U-00010000 - U-001FFFFF, mask 11110XXX
                                    // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                    $utf8 .= substr($chrs, $c, 4);
                                    $c += 3;
                                    break;
    
                                case ($ord_chrs_c & 0xFC) == 0xF8:
                                    // characters U-00200000 - U-03FFFFFF, mask 111110XX
                                    // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                    $utf8 .= substr($chrs, $c, 5);
                                    $c += 4;
                                    break;
    
                                case ($ord_chrs_c & 0xFE) == 0xFC:
                                    // characters U-04000000 - U-7FFFFFFF, mask 1111110X
                                    // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                    $utf8 .= substr($chrs, $c, 6);
                                    $c += 5;
                                    break;
    
                            }
    
                        }
    
                        return $utf8;
    
                    } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
                        // array, or object notation
    
                        if ($str{0} == '[') {
                            $stk = array(SERVICES_JSON_IN_ARR);
                            $arr = array();
                        } else {
                            if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
                                $stk = array(SERVICES_JSON_IN_OBJ);
                                $obj = array();
                            } else {
                                $stk = array(SERVICES_JSON_IN_OBJ);
                                $obj = new stdClass();
                            }
                        }
    
                        array_push($stk, array('what'  => SERVICES_JSON_SLICE,
                                               'where' => 0,
                                               'delim' => false));
    
                        $chrs = substr($str, 1, -1);
                        $chrs = $this->reduce_string($chrs);
    
                        if ($chrs == '') {
                            if (reset($stk) == SERVICES_JSON_IN_ARR) {
                                return $arr;
    
                            } else {
                                return $obj;
    
                            }
                        }
    
                        //print("\nparsing {$chrs}\n");
    
                        $strlen_chrs = strlen($chrs);
    
                        for ($c = 0; $c <= $strlen_chrs; ++$c) {
    
                            $top = end($stk);
                            $substr_chrs_c_2 = substr($chrs, $c, 2);
    
                            if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
                                // found a comma that is not inside a string, array, etc.,
                                // OR we've reached the end of the character list
                                $slice = substr($chrs, $top['where'], ($c - $top['where']));
                                array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
                                //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    
                                if (reset($stk) == SERVICES_JSON_IN_ARR) {
                                    // we are in an array, so just push an element onto the stack
                                    array_push($arr, $this->decode($slice));
    
                                } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
                                    // we are in an object, so figure
                                    // out the property name and set an
                                    // element in an associative array,
                                    // for now
                                    $parts = array();
    
                                    if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
                                        // "name":value pair
                                        $key = $this->decode($parts[1]);
                                        $val = $this->decode($parts[2]);
    
                                        if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
                                            $obj[$key] = $val;
                                        } else {
                                            $obj->$key = $val;
                                        }
                                    } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
                                        // name:value pair, where name is unquoted
                                        $key = $parts[1];
                                        $val = $this->decode($parts[2]);
    
                                        if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
                                            $obj[$key] = $val;
                                        } else {
                                            $obj->$key = $val;
                                        }
                                    }
    
                                }
    
                            } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
                                // found a quote, and we are not inside a string
                                array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
                                //print("Found start of string at {$c}\n");
    
                            } elseif (($chrs{$c} == $top['delim']) &&
                                     ($top['what'] == SERVICES_JSON_IN_STR) &&
                                     ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {
                                // found a quote, we're in a string, and it's not escaped
                                // we know that it's not escaped becase there is _not_ an
                                // odd number of backslashes at the end of the string so far
                                array_pop($stk);
                                //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
    
                            } elseif (($chrs{$c} == '[') &&
                                     in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                                // found a left-bracket, and we are in an array, object, or slice
                                array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
                                //print("Found start of array at {$c}\n");
    
                            } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
                                // found a right-bracket, and we're in an array
                                array_pop($stk);
                                //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    
                            } elseif (($chrs{$c} == '{') &&
                                     in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                                // found a left-brace, and we are in an array, object, or slice
                                array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
                                //print("Found start of object at {$c}\n");
    
                            } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
                                // found a right-brace, and we're in an object
                                array_pop($stk);
                                //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    
                            } elseif (($substr_chrs_c_2 == '/*') &&
                                     in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                                // found a comment start, and we are in an array, object, or slice
                                array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
                                $c++;
                                //print("Found start of comment at {$c}\n");
    
                            } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
                                // found a comment end, and we're in one now
                                array_pop($stk);
                                $c++;
    
                                for ($i = $top['where']; $i <= $c; ++$i)
                                    $chrs = substr_replace($chrs, ' ', $i, 1);
    
                                //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    
                            }
    
                        }
    
                        if (reset($stk) == SERVICES_JSON_IN_ARR) {
                            return $arr;
    
                        } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
                            return $obj;
    
                        }
    
                    }
            }
        }
    
        /**
         * @todo Ultimately, this should just call PEAR::isError()
         */
        function isError($data, $code = null)
        {
            if (class_exists('pear')) {
                return PEAR::isError($data, $code);
            } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
                                     is_subclass_of($data, 'services_json_error'))) {
                return true;
            }
    
            return false;
        }
    }
    
    if (class_exists('PEAR_Error')) {
    
        class Services_JSON_Error extends PEAR_Error
        {
            function Services_JSON_Error($message = 'unknown error', $code = null,
                                         $mode = null, $options = null, $userinfo = null)
            {
                parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
            }
        }
    
    } else {
    
        /**
         * @todo Ultimately, this class shall be descended from PEAR_Error
         */
        class Services_JSON_Error
        {
            function Services_JSON_Error($message = 'unknown error', $code = null,
                                         $mode = null, $options = null, $userinfo = null)
            {
    
            }
        }
    
    }
    
    }
    
    ?>

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