Переменная для вывода ссылки - Разработка расширений для Joomla 3.x

<?php the_permalink(); ?>

<div id="share">
<div class="like">Понравилось? Поделитесь с друзьями!</div>
<div class="social" data-url="<?php the_permalink(); ?>" data-title="<?php the_title(); ?>">
	<a class="push facebook" data-id="fb"><i class="fa fa-facebook"></i> Facebook</a>
	<a class="push twitter" data-id="tw"><i class="fa fa-twitter"></i> Twitter</a>
	<a class="push vkontakte" data-id="vk"><i class="fa fa-vk"></i> Вконтакте</a>
	<a class="push ok" data-id="ok"><i class="fa fa-odnoklassniki"></i> Одноклассники</a>
</div>
</div>

var Shares = {
	title: 'Поделиться',
	width: 800,
	height: 800,
	init: function() {
		var share = document.querySelectorAll('.social');
		for (var i = 0, l = share.length; i < l; i++) {
			var url = share[i].getAttribute('data-url') || location.href,
				title = share[i].getAttribute('data-title') || '',
				desc = share[i].getAttribute('data-desc') || '',
				el = share[i].querySelectorAll('a');
			for (var a = 0, al = el.length; a < al; a++) {
				var id = el[a].getAttribute('data-id');
				if (id) this.addEventListener(el[a], 'click', {
					id: id,
					url: url,
					title: title,
					desc: desc
				});
			}
		}
	},
	addEventListener: function(el, eventName, opt) {
		var _this = this,
			handler = function() {
				_this.share(opt.id, opt.url, opt.title, opt.desc);
			};
		if (el.addEventListener) {
			el.addEventListener(eventName, handler);
		} else {
			el.attachEvent('on' + eventName, function() {
				handler.call(el);
			});
		}
	},
	share: function(id, url, title, desc) {
		url = encodeURIComponent(url);
		desc = encodeURIComponent(desc);
		title = encodeURIComponent(title);
		switch (id) {
			case 'fb':
				this.popupCenter('https://www.facebook.com/sharer/sharer.php?u=' + url, this.title, this.width, this.height);
				break;
			case 'tw':
				var text = title || desc || '';
				if (title.length > 0 && desc.length > 0) text = title + ' - ' + desc;
				if (text.length > 0) text = '&text=' + text;
				this.popupCenter('https://twitter.com/intent/tweet?url=' + url + text, this.title, this.width, this.height);
				break;
			case 'viber':
				this.popupCenter('viber://forward?text=' + url, this.title, this.width, this.height);
				break;
			case 'whatsapp':
				this.popupCenter('https://api.whatsapp.com/send?text=' + url, this.title, this.width, this.height);
				break;
			case 'telegram':
				this.popupCenter('https://telegram.me/share/url?url=' + url, this.title, this.width, this.height);
				break;
		}
	},
	newTab: function(url) {
		var win = window.open(url, '_blank');
		win.focus();
	},
	popupCenter: function(url, title, w, h) {
		var dualScreenLeft = window.screenLeft !== undefined ? window.screenLeft : screen.left;
		var dualScreenTop = window.screenTop !== undefined ? window.screenTop : screen.top;
		var width = window.innerWidth ? window.innerWidth : document.documentElement.clientWidth ? document.documentElement.clientWidth : screen.width;
		var height = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : screen.height;
		var left = ((width / 2) - (w / 2)) + dualScreenLeft;
		var top = ((height / 3) - (h / 3)) + dualScreenTop;
		var newWindow = window.open(url, title, 'scrollbars=yes, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);
		if (window.focus) {
			newWindow.focus();
		}
	}
};
jQuery(document).ready(function($) {
	$('.social a').on('click', function() {
		var id = $(this).data('id');
		if (id) {
			var data = $(this).parent('.social');
			var url = data.data('url') || location.href,
				title = data.data('title') || '',
				desc = data.data('desc') || '';
			Shares.share(id, url, title, desc);
		}
	});
});

<?php echo JURI::Current(); ?>

<?php the_title(); ?>

<?php bloginfo('name'); ?>

$app = JFactory::getApplication('site');
// Установить title
$app->getDocument()->setTitle('Новый титл');
// Получить название сайта (фактически - чтение параметра из файла конфигурации /configuration.php)
$sitename = $app->getCfg('sitename', '');