diff --git a/main/admin/configure_homepage.php b/main/admin/configure_homepage.php
index b371017a22..55abe1e16c 100755
--- a/main/admin/configure_homepage.php
+++ b/main/admin/configure_homepage.php
@@ -2,9 +2,7 @@
 /* For licensing terms, see /license.txt */
 
 $language_file = array('admin', 'accessibility');
-
 $cidReset = true;
-
 require '../inc/global.inc.php';
 
 $this_section = SECTION_PLATFORM_ADMIN;
@@ -77,7 +75,7 @@ if (!empty($_SESSION['user_language_choice'])) {
 	$lang = api_get_setting('platformLanguage');
 }
 
-// ----- Ensuring availability of main files in the corresponding language -----
+// Ensuring availability of main files in the corresponding language
 
 if ($_configuration['multiple_access_urls']) {
 	$access_url_id = api_get_current_access_url_id();
@@ -85,7 +83,7 @@ if ($_configuration['multiple_access_urls']) {
 		$url_info = api_get_access_url($access_url_id);
 		$url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $url_info['url']));
 		$clean_url = replace_dangerous_char($url);
-		$clean_url = str_replace('/','-',$clean_url);
+		$clean_url = str_replace('/', '-', $clean_url);
 		$clean_url .= '/';
 
 		$homep = api_get_path(SYS_PATH).'home/'; //homep for Home Path
diff --git a/main/auth/inscription.php b/main/auth/inscription.php
index 0f9c2a0522..42aae77722 100755
--- a/main/auth/inscription.php
+++ b/main/auth/inscription.php
@@ -60,7 +60,7 @@ if ($_configuration['multiple_access_urls']) {
 		$url_info = api_get_access_url($access_url_id);
 		$url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $url_info['url']));
 		$clean_url = replace_dangerous_char($url);
-		$clean_url = str_replace('/','-',$clean_url);
+		$clean_url = str_replace('/', '-', $clean_url);
 		$clean_url .= '/';
 		$home_old  = api_get_path(SYS_PATH).'home/';
 		$home = api_get_path(SYS_PATH).'home/'.$clean_url;
diff --git a/main/inc/banner.inc.php b/main/inc/banner.inc.php
index ae67f91d3b..67ab864317 100755
--- a/main/inc/banner.inc.php
+++ b/main/inc/banner.inc.php
@@ -1,16 +1,15 @@
 <?php
 /* For licensing terms, see /chamilo_license.txt */
-require_once api_get_path(SYS_CODE_PATH).'/inc/lib/banner.lib.php';
 
-/* For licensing terms, see /dokeos_license.txt */
 /**
-==============================================================================
-*	This script contains the actual html code to display the "header"
-*	or "banner" on top of every Dokeos page.
-*
-*	@package dokeos.include
-==============================================================================
-*/
+ *	This script contains the actual html code to display the "header"
+ *	or "banner" on top of every Dokeos page.
+ *
+ *	@package chamilo.include
+ */
+
+require_once api_get_path(SYS_CODE_PATH).'/inc/lib/banner.lib.php';
+
 $session_id     = api_get_session_id();
 $session_name   = api_get_session_name($my_session_id);
 ?>
@@ -31,39 +30,33 @@ $session_name   = api_get_session_name($my_session_id);
 		</div>
 <?php
 /*
------------------------------------------------------------------------------
 	Course title section
------------------------------------------------------------------------------
 */
 if (!empty($_cid) and $_cid != -1 and isset($_course)) {
 	//Put the name of the course in the header
 ?>
 	<div id="my_courses"><a href="<?php echo api_get_path(WEB_COURSE_PATH).$_course['path']; ?>/index.php" target="_top">
 <?php
-	echo $_course['name']." ";
-	/*echo '
-		<div id="my_courses">
-			<a href="'.api_get_path(WEB_COURSE_PATH).$_course['path'].'/index.php" target="_top">'.$_course['name'].' ';*/
-	if (api_get_setting("display_coursecode_in_courselist") == "true") {
+	echo $_course['name'].' ';
+	if (api_get_setting('display_coursecode_in_courselist') == 'true') {
 		echo $_course['official_code'];
 	}
-
-	if(api_get_setting("use_session_mode") == "true" && isset($_SESSION['session_name'])) {
+	if (api_get_setting('use_session_mode') == 'true' && isset($_SESSION['session_name'])) {
 		echo '&nbsp;('.$_SESSION['session_name'].')&nbsp;';
 	}
-	if (api_get_setting("display_coursecode_in_courselist") == "true" AND api_get_setting("display_teacher_in_courselist") == "true") {
-		echo " - ";
+	if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
+		echo ' - ';
 	}
-	if (api_get_setting("display_teacher_in_courselist") == "true") {
+	if (api_get_setting('display_teacher_in_courselist') == 'true') {
 		echo stripslashes($_course['titular']);
 	}
-	echo "</a></div>";
-} elseif (isset ($nameTools) && $language_file != 'course_home') {
+	echo '</a></div>';
+} elseif (isset($nameTools) && $language_file != 'course_home') {
 	//Put the name of the user-tools in the header
-	if (!isset ($_user['user_id'])) {
+	if (!isset($_user['user_id'])) {
 		echo '<div id="my_courses"></div>';
-	} elseif(!$noPHP_SELF) {
-		echo "<div id=\"my_courses\"><a href=\"".api_get_self()."?".api_get_cidreq(), "\" target=\"_top\">", $nameTools, "</a></div>", "\n";
+	} elseif (!$noPHP_SELF) {
+		echo '<div id="my_courses"><a href="'.api_get_self().'?'.api_get_cidreq(), '" target="_top">', $nameTools, '</a></div>', "\n";
 	} else {
 		echo '<div id="my_courses">'.$nameTools.'</div>';
 	}
@@ -74,28 +67,23 @@ if (!empty($_cid) and $_cid != -1 and isset($_course)) {
 echo '<div class="clear">&nbsp;</div>';
 
 /*
------------------------------------------------------------------------------
 	Plugins for banner section
------------------------------------------------------------------------------
 */
 api_plugin('header');
 $web_course_path = api_get_path(WEB_COURSE_PATH);
 
 /*
------------------------------------------------------------------------------
 	External link section
------------------------------------------------------------------------------
 */
-if (isset($_course['extLink']) && $_course['extLink']['name'] != "") {
-	echo "<span class=\"extLinkSeparator\"> / </span>";
-	if ($_course['extLink']['url'] != "") {
-		echo "<a class=\"extLink\" href=\"".$_course['extLink']['url']."\" target=\"_top\">";
+if (isset($_course['extLink']) && $_course['extLink']['name'] != '') {
+	echo '<span class="extLinkSeparator"> / </span>';
+	if ($_course['extLink']['url'] != '') {
+		echo '<a class="extLink" href="'.$_course['extLink']['url'].'" target="_top">';
 		echo $_course['extLink']['name'];
-		echo "</a>";
+		echo '</a>';
 	} else {
 		echo $_course['extLink']['name'];
 	}
-
 }
 ?>
 	</div>
@@ -103,28 +91,28 @@ if (isset($_course['extLink']) && $_course['extLink']['name'] != "") {
 		<div id="Header2Right">
 			<ul>
 <?php
-if ((api_get_setting('showonline','world') == "true" AND !$_user['user_id']) OR (api_get_setting('showonline','users') == "true" AND $_user['user_id']) OR (api_get_setting('showonline','course') == "true" AND $_user['user_id'] AND $_cid)) {
-	if (api_get_setting("use_session_mode") == "true" && isset($_user['user_id']) && api_is_coach()) {
+if ((api_get_setting('showonline', 'world') == 'true' AND !$_user['user_id']) OR (api_get_setting('showonline', 'users') == 'true' AND $_user['user_id']) OR (api_get_setting('showonline', 'course') == 'true' AND $_user['user_id'] AND $_cid)) {
+	if (api_get_setting('use_session_mode') == 'true' && isset($_user['user_id']) && api_is_coach()) {
 	    echo '<li><a href="'.api_get_path(WEB_PATH).'whoisonlinesession.php?id_coach='.$_user['user_id'].'&amp;referer='.urlencode($_SERVER['REQUEST_URI']).'" target="_top">'.get_lang('UsersConnectedToMySessions').'</a></li>';
 	}
 	$number = count(WhoIsOnline(api_get_setting('time_limit_whosonline')));
 	if(!empty($_course['id'])) {
 		$online_in_course = who_is_online_in_this_course(api_get_user_id(), api_get_setting('time_limit_whosonline'), $_course['id']);
-		$number_online_in_course= count( $online_in_course );
+		$number_online_in_course = count($online_in_course);
 	} else {
 		$number_online_in_course = 0;
 	}
 
- 	echo "<li>";
+ 	echo '<li>';
 	// Display the who's online of the platform
-	if ((api_get_setting('showonline','world') == "true" AND !$_user['user_id']) OR (api_get_setting('showonline','users') == "true" AND $_user['user_id'])) {
+	if ((api_get_setting('showonline', 'world') == 'true' AND !$_user['user_id']) OR (api_get_setting('showonline', 'users') == 'true' AND $_user['user_id'])) {
 		//echo '<a href="'.api_get_path(WEB_PATH).'whoisonline.php" target="_top">'.$number.'</a>';
 		echo '<a href="'.api_get_path(WEB_PATH).'whoisonline.php" target="_top">'.get_lang('UsersOnline').': '.$number.'</a>';
 	}
 
 	// Display the who's online for the course
-	if (is_array($_course) AND api_get_setting('showonline','course') == "true" AND isset($_course['sysCode'])) {
-		echo "(<a href='".api_get_path(WEB_PATH)."whoisonline.php?cidReq=".$_course['sysCode']."' target='_top'>$number_online_in_course ".get_lang('InThisCourse')."</a>)";
+	if (is_array($_course) AND api_get_setting('showonline', 'course') == 'true' AND isset($_course['sysCode'])) {
+		echo '(<a href="'.api_get_path(WEB_PATH).'whoisonline.php?cidReq='.$_course['sysCode'].'" target="_top">'.$number_online_in_course.' '.get_lang('InThisCourse').'</a>)';
 	}
 	echo '</li>';
 }
@@ -136,13 +124,13 @@ if ($_user['user_id'] && isset($_cid)) {
 		echo '</li>';
 	}
 }
-if ( api_is_allowed_to_edit() ) {
-	if(!empty($help)) {
+if (api_is_allowed_to_edit()) {
+	if (!empty($help)) {
 	// Show help
 	?>
 	<li>|
-	<a href="#" onclick="MyWindow=window.open('<?php echo api_get_path(WEB_CODE_PATH)."help/help.php"; ?>?open=<?php echo $help; ?>','MyWindow','toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,width=620,height=600,left=200,top=20'); return false;">
-	<img src="<?php echo api_get_path(WEB_CODE_PATH); ?>img/khelpcenter.gif" style="vertical-align: middle;" alt="<?php echo get_lang("Help") ?>"/>&nbsp;<?php echo get_lang("Help") ?></li></a>
+	<a href="#" onclick="MyWindow=window.open('<?php echo api_get_path(WEB_CODE_PATH).'help/help.php'; ?>?open=<?php echo $help; ?>','MyWindow','toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,width=620,height=600,left=200,top=20'); return false;">
+	<img src="<?php echo api_get_path(WEB_CODE_PATH); ?>img/khelpcenter.gif" style="vertical-align: middle;" alt="<?php echo get_lang('Help'); ?>"/>&nbsp;<?php echo get_lang('Help'); ?></li></a>
 
 	<?php
 	}
@@ -156,9 +144,7 @@ if ( api_is_allowed_to_edit() ) {
 	<div id="header3">
 <?php
 /*
------------------------------------------------------------------------------
 	User section
------------------------------------------------------------------------------
 */
 if ($_user['user_id']) {
 	$login = '';
@@ -247,7 +233,7 @@ if ($_user['user_id'] && !api_is_anonymous()) {
 
 	// Dashboard
 	if (api_get_setting('show_tabs', 'dashboard') == 'true') {
-		if (api_is_platform_admin() || $_user['status']==DRH) {
+		if (api_is_platform_admin() || $_user['status'] == DRH) {
 			$navigation['dashboard'] = $possible_tabs['dashboard'];
 		}
 	} else{
@@ -255,7 +241,7 @@ if ($_user['user_id'] && !api_is_anonymous()) {
 	}
 
 	// Administration
-	if(api_is_platform_admin(true)) {
+	if (api_is_platform_admin(true)) {
 		if (api_get_setting('show_tabs', 'platform_administration') == 'true') {
 			$navigation['platform_admin'] = $possible_tabs['platform_admin'];
 		} else {
@@ -265,36 +251,35 @@ if ($_user['user_id'] && !api_is_anonymous()) {
 }
 
 // Displaying the tabs
-foreach($navigation as $section => $navigation_info) {
-	if(isset($GLOBALS['this_section'])) {
-		$current = ($section == $GLOBALS['this_section'] ? ' id="current"' : '');
+foreach ($navigation as $section => $navigation_info) {
+	if (isset($GLOBALS['this_section'])) {
+		$current = $section == $GLOBALS['this_section'] ? ' id="current"' : '';
 	} else {
 		$current = '';
 	}
 	echo '<li'.$current.'><a  href="'.$navigation_info['url'].'" target="_top"><span id="tab_active">'.$navigation_info['title'].'</span></a></li>'."\n";
 }
 
-/*********************/
 $lang = ''; //el for "Edit Language"
-if(!empty($_SESSION['user_language_choice'])) {
-	$lang=$_SESSION['user_language_choice'];
-} elseif(!empty($_SESSION['_user']['language'])) {
-	$lang=$_SESSION['_user']['language'];
+if (!empty($_SESSION['user_language_choice'])) {
+	$lang = $_SESSION['user_language_choice'];
+} elseif (!empty($_SESSION['_user']['language'])) {
+	$lang = $_SESSION['_user']['language'];
 } else {
-	$lang=get_setting('platformLanguage');
+	$lang = get_setting('platformLanguage');
 }
 
-if ($_configuration['multiple_access_urls']==true) {
+if ($_configuration['multiple_access_urls']) {
 	$access_url_id = api_get_current_access_url_id();
-	if ($access_url_id != -1){
+	if ($access_url_id != -1) {
 		$url_info = api_get_access_url($access_url_id);
-		//$url = substr($url_info['url'],7,strlen($url_info['url'])-8);
 		$url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $url_info['url']));
 		$clean_url = replace_dangerous_char($url);
-		$clean_url = str_replace('/','-',$clean_url);
+		$clean_url = str_replace('/', '-', $clean_url);
 		$clean_url .= '/';
-		$homep = '../../home/'; //homep for Home Path
-		$homep_new = '../../home/'.$clean_url; //homep for Home Path added the url
+
+		$homep = api_get_path(SYS_PATH).'home/'; //homep for Home Path
+		$homep_new = api_get_path(SYS_PATH).'home/'.$clean_url; //homep for Home Path added the url
 		$new_url_dir = api_get_path(SYS_PATH).'home/'.$clean_url;
 		//we create the new dir for the new sites
 		if (!is_dir($new_url_dir)){
@@ -302,49 +287,46 @@ if ($_configuration['multiple_access_urls']==true) {
 		}
 	}
 } else {
-	$homep_new ='';
-	$vv = explode('/', api_get_self());
-	if(count($vv) > 2)	$homep = '../../home/';
-	else				$homep = 'home/';
+	$homep_new = '';
+	$homep = api_get_path(SYS_PATH).'home/';
 }
+
 $ext = '.html';
 $menutabs = 'home_tabs';
-if(is_file($homep.$menutabs.'_'.$lang.$ext) && is_readable($homep.$menutabs.'_'.$lang.$ext)) {
-	$home_top=file_get_contents($homep.$menutabs.'_'.$lang.$ext);
-} elseif(is_file($homep.$menutabs.$lang.$ext) && is_readable($homep.$menutabs.$lang.$ext)) {
-	$home_top=file_get_contents($homep.$menutabs.$lang.$ext);
+if (is_file($homep.$menutabs.'_'.$lang.$ext) && is_readable($homep.$menutabs.'_'.$lang.$ext)) {
+	$home_top = file_get_contents($homep.$menutabs.'_'.$lang.$ext);
+} elseif (is_file($homep.$menutabs.$lang.$ext) && is_readable($homep.$menutabs.$lang.$ext)) {
+	$home_top = file_get_contents($homep.$menutabs.$lang.$ext);
 } else {
-	$errorMsg=get_lang('HomePageFilesNotReadable');
+	$errorMsg = get_lang('HomePageFilesNotReadable');
 }
 
-if(api_get_self() != '/main/admin/configure_homepage.php') {
-	if(file_exists($homep.$menutabs.'_'.$lang.$ext)) {
-		$home_top_temp=file_get_contents($homep.$menutabs.'_'.$lang.$ext);
+if (api_get_self() != '/main/admin/configure_homepage.php') {
+	if (file_exists($homep.$menutabs.'_'.$lang.$ext)) {
+		$home_top_temp = file_get_contents($homep.$menutabs.'_'.$lang.$ext);
 	} else if (file_exists($homep.$menutabs.$ext)) {
-		$home_top_temp=file_get_contents($homep.$menutabs.$ext);
+		$home_top_temp = file_get_contents($homep.$menutabs.$ext);
 	}
-	$open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
+	$open = str_replace('{rel_path}',api_get_path(REL_PATH), $home_top_temp);
 	echo $open;
 } else {
 	$home_menu = '';
-	if(file_exists($homep.$menutabs.'_'.$lang.$ext)) {
+	if (file_exists($homep.$menutabs.'_'.$lang.$ext)) {
 		$home_menu = file($homep.$menutabs.'_'.$lang.$ext);
 	} else {
-		$home_menu = file ($homep.$menutabs.$ext);
+		$home_menu = file($homep.$menutabs.$ext);
 	}
-	foreach($home_menu as $key=>$enreg) {
-		$enreg=trim($enreg);
-		if(!empty($enreg)) {
-			$edit_link='<a href="'.api_get_self().'?action=edit_tabs&amp;link_index='.$key.'" ><span>'.Display::return_icon('edit.gif', get_lang('Edit')).'</span></a>';
-			$delete_link='<a href="'.api_get_self().'?action=delete_tabs&amp;link_index='.$key.'"  onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)).'\')) return false;"><span>'.Display::return_icon('delete.gif', get_lang('Delete')).'</span></a>';
+	foreach ($home_menu as $key => $enreg) {
+		$enreg = trim($enreg);
+		if (!empty($enreg)) {
+			$edit_link = '<a href="'.api_get_self().'?action=edit_tabs&amp;link_index='.$key.'" ><span>'.Display::return_icon('edit.gif', get_lang('Edit')).'</span></a>';
+			$delete_link = '<a href="'.api_get_self().'?action=delete_tabs&amp;link_index='.$key.'"  onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)).'\')) return false;"><span>'.Display::return_icon('delete.gif', get_lang('Delete')).'</span></a>';
 			$tab_string = str_replace(array('href="'.api_get_path(WEB_PATH).'index.php?include=','</li>'),array('href="'.api_get_path(WEB_CODE_PATH).'admin/'.basename(api_get_self()).'?action=open_link&link=',''.$edit_link.$delete_link.'</li>'),$enreg);
 			echo $tab_string;
 		}
 	}
-	echo '<li id="insert-link"> <a href="'.api_get_self().'?action=insert_tabs" style="padding-right:0px;"><span>'. Display::return_icon('insert_row.png', get_lang('InsertLink'),array('style'=>'vertical-align:middle')).' '.get_lang('InsertLink').'</span></a></li>';
+	echo '<li id="insert-link"> <a href="'.api_get_self().'?action=insert_tabs" style="padding-right:0px;"><span>'. Display::return_icon('insert_row.png', get_lang('InsertLink'), array('style' => 'vertical-align:middle')).' '.get_lang('InsertLink').'</span></a></li>';
 }
-/*********************/
-//Header about the tabs
 
 if ($_self == 'admin_intro_edition_page')
 ?>
@@ -357,29 +339,29 @@ if ($_self == 'admin_intro_edition_page')
  */
 $navigation = array();
 // part 1: Course Homepage. If we are in a course then the first breadcrumb is a link to the course homepage
-//hide_course_breadcrumb the parameter has been added to hide the name of the course, that appeared in the default $interbreadcrumb
-$my_session_name= ($session_name==null) ? '' : '&nbsp;('.$session_name.')';
-if (isset ($_cid) and $_cid!=-1 and isset($_course) and !isset($_GET['hide_course_breadcrumb'])) {
-	$navigation_item['url'] = $web_course_path . $_course['path'].'/index.php'.(!empty($session_id)?'?id_session='.$session_id:'');
-	switch(api_get_setting('breadcrumbs_course_homepage')) {
+// hide_course_breadcrumb the parameter has been added to hide the name of the course, that appeared in the default $interbreadcrumb
+$my_session_name = is_null($session_name) ? '' : '&nbsp;('.$session_name.')';
+if (isset ($_cid) and $_cid != -1 and isset($_course) and !isset($_GET['hide_course_breadcrumb'])) {
+	$navigation_item['url'] = $web_course_path . $_course['path'].'/index.php'.(!empty($session_id) ? '?id_session='.$session_id : '');
+	switch (api_get_setting('breadcrumbs_course_homepage')) {
 		case 'get_lang':
-			$navigation_item['title'] =  get_lang('CourseHomepageLink');
+			$navigation_item['title'] = get_lang('CourseHomepageLink');
 			break;
 		case 'course_code':
-			$navigation_item['title'] =  $_course['official_code'];
+			$navigation_item['title'] = $_course['official_code'];
 			break;
 		case 'session_name_and_course_title':
-			$navigation_item['title'] =  $_course['name'].$my_session_name;
+			$navigation_item['title'] = $_course['name'].$my_session_name;
 			break;
 		default:
-			$navigation_item['title'] =  $_course['name'];
+			$navigation_item['title'] = $_course['name'];
 			break;
 	}
 	$navigation[] = $navigation_item;
 }
 // part 2: Interbreadcrumbs. If there is an array $interbreadcrumb defined then these have to appear before the last breadcrumb (which is the tool itself)
 if (isset($interbreadcrumb) && is_array($interbreadcrumb)) {
-	foreach($interbreadcrumb as $breadcrumb_step) {
+	foreach ($interbreadcrumb as $breadcrumb_step) {
 		$sep = (strrchr($breadcrumb_step['url'], '?') ? '&amp;' : '?');
 		$navigation_item['url'] = $breadcrumb_step['url'].$sep.api_get_cidreq();
 		$navigation_item['title'] = $breadcrumb_step['name'];
@@ -388,30 +370,30 @@ if (isset($interbreadcrumb) && is_array($interbreadcrumb)) {
 }
 // part 3: The tool itself. If we are on the course homepage we do not want to display the title of the course because this
 // is the same as the first part of the breadcrumbs (see part 1)
-if (isset ($nameTools) AND $language_file<>"course_home") {
+if (isset($nameTools) && $language_file != 'course_home') { // TODO: This condition $language_file != 'course_home' might bring surprises.
 	$navigation_item['url'] = '#';
 	$navigation_item['title'] = $nameTools;
 	$navigation[] = $navigation_item;
 }
 
 $final_navigation = array();
-foreach($navigation as $index => $navigation_info) {
-	if(!empty($navigation_info['title'])) {
+foreach ($navigation as $index => $navigation_info) {
+	if (!empty($navigation_info['title'])) {
 		$final_navigation[$index] = '<a href="'.$navigation_info['url'].'" class="breadcrumb breadcrumb'.$index.'" target="_top">'.$navigation_info['title'].'</a>';
 	}
 }
 
 if (!empty($final_navigation)) {
 	echo '<div id="header4">';
-	echo implode(' &gt; ',$final_navigation);
+	echo implode(' &gt; ', $final_navigation);
 	echo '</div>';
 } else {
 	echo '<div id="header4">';
 	echo '</div>';
 }
-if(api_get_setting('show_toolshortcuts')=='true') {
+if (api_get_setting('show_toolshortcuts') == 'true') {
 	echo '<div id="toolshortcuts">';
-	require_once('tool_navigation_menu.inc.php');
+	require_once 'tool_navigation_menu.inc.php';
  	show_navigation_tool_shortcuts();
   	echo '</div>';
 }
@@ -432,21 +414,20 @@ if (isset ($dokeos_database_connection)) {
 <?php
 //to mask the main div, set $header_hide_main_div to true in any script just before calling Display::display_header();
 global $header_hide_main_div;
-if (!empty($header_hide_main_div) && $header_hide_main_div===true) {
+if (!empty($header_hide_main_div) && $header_hide_main_div === true) {
 	//do nothing
 } else {
 ?>
 <div id="main"> <!-- start of #main wrapper for #content and #menu divs -->
 <?php
 }
+
 /*
------------------------------------------------------------------------------
 	"call for chat" module section
------------------------------------------------------------------------------
 */
 $chat = strpos(api_get_self(), 'chat_banner.php');
 if (!$chat) {
-	include_once (api_get_path(LIBRARY_PATH)."online.inc.php");
+	include_once api_get_path(LIBRARY_PATH).'online.inc.php';
 	//echo $accept;
 	$chatcall = chatcall();
 	if ($chatcall) {
@@ -455,26 +436,24 @@ if (!$chat) {
 }
 
 /*
------------------------------------------------------------------------------
 	Navigation menu section
------------------------------------------------------------------------------
 */
-if(api_get_setting('show_navigation_menu') != 'false' && api_get_setting('show_navigation_menu') != 'icons') {
+if (api_get_setting('show_navigation_menu') != 'false' && api_get_setting('show_navigation_menu') != 'icons') {
 	Display::show_course_navigation_menu($_GET['isHidden']);
 	$course_id = api_get_course_id();
-   if (!empty($course_id) && ($course_id != -1)) {
+	if (!empty($course_id) && ($course_id != -1)) {
 		echo '<div id="menuButton">';
  		echo $output_string_menu;
  		echo '</div>';
-		if(isset($_SESSION['hideMenu'])) {
-			if($_SESSION['hideMenu'] =="shown") {
- 				if (isset($_cid) ) {
+		if (isset($_SESSION['hideMenu'])) {
+			if ($_SESSION['hideMenu'] == 'shown') {
+ 				if (isset($_cid)) {
 					echo '<div id="centerwrap"> <!-- start of #centerwrap -->';
 					echo '<div id="center"> <!-- start of #center -->';
 				}
 			}
  		} else {
-			if (isset($_cid) ) {
+			if (isset($_cid)) {
 				echo '<div id="centerwrap"> <!-- start of #centerwrap -->';
 				echo '<div id="center"> <!-- start of #center -->';
 			}
@@ -482,6 +461,5 @@ if(api_get_setting('show_navigation_menu') != 'false' && api_get_setting('show_n
  	}
 }
 
-
 ?>
 <!--   Begin Of script Output   -->