Joomla plugin to insert codes in head section

Following is a template that can be used to develop plugins to inert code into Joomla head section.

01.<?xml version="1.0" encoding="utf-8"?>

02.<install version="1.5" type="plugin" group="system">

03.<name>System - Name of Plugin</name>

04.<author>Name of  author</author>

05.<creationDate>19th April 2010</creationDate>

06.<authorEmail>

07.<script language="JavaScript" type="text/javascript">

08.<!--

09.var prefix = 'mailto:';

10.var suffix = '';

11.var attribs = '';

12.var path = 'hr' + 'ef' + '=';

13.var addy40766 = 'email' + '@';

14.addy40766 = addy40766 + 'email' + '.' + 'com';

15.document.write( '<a ' + path + '\'' + prefix + addy40766 + suffix + '\'' + attribs + '>' );

16.document.write( addy40766 );

17.document.write( '<\/a>' );

18.//-->

19.</script><a href="mailto:email@email.com">email@email.com</a><script language="JavaScript" type="text/javascript">

20.<!--

21.document.write( '<span style=\'display: none;\'>' );

22.//-->

23.</script><span style="display: none;">This e-mail address is being protected from spambots. You need JavaScript enabled to view it

24.<script language="JavaScript" type="text/javascript">

25.<!--

26.document.write( '</' );

27.document.write( 'span>' );

28.//-->

29.</script></span></authorEmail>

30.<authorUrl>http://www.khawaib.co.uk</authorUrl>

31.<version>1.0</version>

32.<copyright>Copyright (c) 2010 Khawaib Ahmed. All rights reserved.</copyright>

33.<license>http://www.gnu.org/copyleft/gpl.html GNU/GPL</license>

34.<description> Plugin description.</description>

35.<files>

36.<filename plugin="phpFileName">phpFileName.php</filename>

37.</files>

38.<params>

39.<param name="code" type="text" default="[DEFAULT VALUE]" label="[LABEL]" description=" [DESCRIPTION]"  />

40.</params>

41.</install>

01.<?php

02.// no direct access

03.defined( '_JEXEC' ) or die( 'Restricted access' );

04.

05.jimport( 'joomla.plugin.plugin');

06.

07.class plgSystemAsynGoogleAnalytics extends JPlugin {

08.function plgAsynGoogleAnalytics(&$subject, $config)   {

09.parent::__construct($subject, $config);

10.$this->_plugin = JPluginHelper::getPlugin( 'system', 'AsynGoogleAnalytics' );

11.$this->_params = new JParameter( $this->_plugin->params );

12.}

13.

14.function onAfterRender() {

15.global $mainframe;

16.

17.// skip if admin page

18.if($mainframe->isAdmin()) {

19.return;

20.}

21.

22.// get params

23.$trackerCode = $this->params->get( 'code', '' );

24.

25.//getting body code and storing as buffer

26.$buffer = JResponse::getBody();

27.

28.//embed Google Analytics code

29.$javascript = "<script type=\"text/javascript\">

30.var _gaq = _gaq || [];

31.

32._gaq.push(['_setAccount', '".$trackerCode."']);

33._gaq.push(['_trackPageview']);

34.

35.(function() {

36.var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;

37.ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';

38.var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);

39.})();

40.</script>";

41.

42.// adding the Google Analytics code in the header before the ending </head> tag and then replacing the buffer

43.$buffer = preg_replace ("/<\/head>/", "\n\n".$javascript."\n\n</head>", $buffer);

44.

45.//output the buffer

46.JResponse::setBody($buffer);

47.

48.return true;

49.}

50.}

51.?>