Browse Source

[svn r13487] Various fixes, including one fix to enable filtering by group (had been lost in previous code updates)

Yannick Warnier 17 years ago
parent
commit
8f45ba47f6
2 changed files with 82 additions and 78 deletions
  1. 73 68
      main/calendar/agenda.inc.php
  2. 9 10
      main/calendar/agenda.php

+ 73 - 68
main/calendar/agenda.inc.php

@@ -1,4 +1,4 @@
-<?php //$Id: agenda.inc.php 13322 2007-09-27 12:07:11Z elixir_julian $
+<?php //$Id: agenda.inc.php 13487 2007-10-16 18:27:53Z yannoo $
 /*
 /*
 ==============================================================================
 ==============================================================================
 	Dokeos - elearning and course management software
 	Dokeos - elearning and course management software
@@ -28,7 +28,7 @@
 	reworked it and cleaned the code to make it more readable. The code for
 	reworked it and cleaned the code to make it more readable. The code for
 	the small calender on the left is taken from the My Agenda tool.
 	the small calender on the left is taken from the My Agenda tool.
 
 
-	Reabability is also the reason why I use the if ($is_allowedToEdit)
+	Reabability is also the reason why I use the if ($is_allowed_to_edit)
 	check for each part of the code. I'm aware that is duplication, but
 	check for each part of the code. I'm aware that is duplication, but
 	it makes the code much easier to read.
 	it makes the code much easier to read.
 ==============================================================================
 ==============================================================================
@@ -56,14 +56,15 @@ $MonthsLong = array (get_lang("JanuaryLong"), get_lang("FebruaryLong"), get_lang
 /**
 /**
 * Retrieves all the agenda items from the table
 * Retrieves all the agenda items from the table
 * @author: Patrick Cool <patrick.cool@UGent.be>, Ghent University
 * @author: Patrick Cool <patrick.cool@UGent.be>, Ghent University
+* @author Yannick Warnier <yannick.warnier@dokeos.com> - cleanup
 * @param integer $month: the integer value of the month we are viewing
 * @param integer $month: the integer value of the month we are viewing
 * @param integer $year: the 4-digit year indication e.g. 2005
 * @param integer $year: the 4-digit year indication e.g. 2005
 * @return array
 * @return array
 */
 */
-function get_kalender_items($month, $year)
+function get_calendar_items($month, $year)
 {
 {
 	global $_user, $_course;
 	global $_user, $_course;
-	global $is_allowedToEdit;
+	global $is_allowed_to_edit;
 
 
 	// database variables
 	// database variables
 	$TABLEAGENDA=Database::get_course_table(TABLE_AGENDA);
 	$TABLEAGENDA=Database::get_course_table(TABLE_AGENDA);
@@ -74,16 +75,18 @@ function get_kalender_items($month, $year)
 	if (is_allowed_to_edit() OR api_get_course_setting('allow_user_edit_agenda'))
 	if (is_allowed_to_edit() OR api_get_course_setting('allow_user_edit_agenda'))
 	{
 	{
 		//echo "course admin";
 		//echo "course admin";
-		// added GROUP BY `agenda`.`id` to prevent double display of a message that has been sent to two groups
+		// added GROUP BY agenda.id to prevent double display of a message that has been sent to two groups
 		$sql="SELECT
 		$sql="SELECT
 			DISTINCT agenda.*, toolitemproperties.*
 			DISTINCT agenda.*, toolitemproperties.*
 			FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 			FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-			WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-			AND MONTH(`agenda`.`start_date`)='".$month."' AND YEAR(`agenda`.`start_date`)='".$year."'
-			AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-			AND `toolitemproperties`.`visibility`='1'
-			GROUP BY `agenda`.`id`
-			ORDER BY  start_date ".$sort;
+			WHERE agenda.id = toolitemproperties.ref   ".
+			//$show_all_current.
+			" AND MONTH(agenda.start_date)='".$month."' AND YEAR(agenda.start_date)='".$year."'
+			AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+			AND toolitemproperties.visibility='1'
+			GROUP BY agenda.id ".
+			"ORDER BY  start_date ";
+			//.$sort;
 	}
 	}
 	// if the user is not an administrator of that course
 	// if the user is not an administrator of that course
 	else
 	else
@@ -94,24 +97,28 @@ function get_kalender_items($month, $year)
 			$sql="SELECT
 			$sql="SELECT
 				agenda.*, toolitemproperties.*
 				agenda.*, toolitemproperties.*
 				FROM ".$TABLEAGENDA." agenda,	".$TABLE_ITEM_PROPERTY." toolitemproperties
 				FROM ".$TABLEAGENDA." agenda,	".$TABLE_ITEM_PROPERTY." toolitemproperties
-				WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-				AND MONTH(`agenda`.`start_date`)='".$month."'
-				AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-				AND	( `toolitemproperties`.`to_user_id`='".$_user['user_id']."' OR `toolitemproperties`.`to_group_id` IN (0, ".implode(", ", $group_memberships).") )
-				AND `toolitemproperties`.`visibility`='1'
-				ORDER BY  start_date ".$sort;
+				WHERE agenda.id = toolitemproperties.ref   ".
+				//$show_all_current.
+				" AND MONTH(agenda.start_date)='".$month."'
+				AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+				AND	( toolitemproperties.to_user_id='".$_user['user_id']."' OR toolitemproperties.to_group_id IN (0, ".implode(", ", $group_memberships).") )
+				AND toolitemproperties.visibility='1'"
+				."ORDER BY  start_date ";
+				//.$sort;
 		}
 		}
 		else
 		else
 		{
 		{
 			$sql="SELECT
 			$sql="SELECT
 				agenda.*, toolitemproperties.*
 				agenda.*, toolitemproperties.*
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-				WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-				AND MONTH(`agenda`.`start_date`)='".$month."'
-				AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-				AND ( `toolitemproperties`.`to_user_id`='".$_user['user_id']."' OR `toolitemproperties`.`to_group_id`='0')
-				AND `toolitemproperties`.`visibility`='1'
-				ORDER BY  start_date ".$sort;
+				WHERE agenda.id = toolitemproperties.ref   ".
+				//$show_all_current.
+				" AND MONTH(agenda.start_date)='".$month."'
+				AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+				AND ( toolitemproperties.to_user_id='".$_user['user_id']."' OR toolitemproperties.to_group_id='0')
+				AND toolitemproperties.visibility='1' ".
+				"ORDER BY  start_date ";
+				//.$sort;
 		}
 		}
 	}
 	}
 	$result=api_sql_query($sql,__FILE__,__LINE__);
 	$result=api_sql_query($sql,__FILE__,__LINE__);
@@ -216,12 +223,11 @@ function display_minimonthcalendar($agendaitems, $month, $year, $monthName)
 function display_monthcalendar($month, $year)
 function display_monthcalendar($month, $year)
 {
 {
 	global $MonthsLong;
 	global $MonthsLong;
-	global $datakalenderitems;
 	global $DaysShort;
 	global $DaysShort;
 	global $origin;
 	global $origin;
 
 
-	// grabbing all the kalender items for this year and storing it in a array
-	$data=get_kalender_items($month,$year);
+	// grabbing all the calendar items for this year and storing it in a array
+	$data=get_calendar_items($month,$year);
 
 
 
 
 	//Handle leap year
 	//Handle leap year
@@ -1223,7 +1229,7 @@ function delete_agenda_item($id)
 			// displaying the result message in the yellow box
 			// displaying the result message in the yellow box
 			Display::display_normal_message(get_lang("AgendaDeleteSuccess"));
 			Display::display_normal_message(get_lang("AgendaDeleteSuccess"));
 			}	  // if (isset($id)&&$id&&isset($action)&&$action=="delete")
 			}	  // if (isset($id)&&$id&&isset($action)&&$action=="delete")
-		} // if ($is_allowedToEdit)
+		} // if ($is_allowed_to_edit)
 
 
 }
 }
 /**
 /**
@@ -1251,6 +1257,7 @@ function showhide_agenda_item($id)
 /**
 /**
 * Displays all the agenda items
 * Displays all the agenda items
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
 * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
+* @author Yannick Warnier <yannick.warnier@dokeos.com> - cleanup
 */
 */
 function display_agenda_items()
 function display_agenda_items()
 {
 {
@@ -1259,8 +1266,7 @@ function display_agenda_items()
 	global $select_month, $select_year;
 	global $select_month, $select_year;
 	global $DaysShort, $DaysLong, $MonthsLong;
 	global $DaysShort, $DaysLong, $MonthsLong;
 	global $is_courseAdmin;
 	global $is_courseAdmin;
-	global $dateFormatLong, $timeNoSecFormat,$charset;
-	global $_user;
+	global $dateFormatLong, $timeNoSecFormat,$charset, $_user, $_course;
 
 
 	// getting the group memberships
 	// getting the group memberships
 	$group_memberships=GroupManager::get_group_ids($_course['dbName'],$_user['user_id']);
 	$group_memberships=GroupManager::get_group_ids($_course['dbName'],$_user['user_id']);
@@ -1304,7 +1310,7 @@ function display_agenda_items()
 	{
 	{
 		// A.1. you are a course admin with a USER filter
 		// A.1. you are a course admin with a USER filter
 		// => see only the messages of this specific user + the messages of the group (s)he is member of.
 		// => see only the messages of this specific user + the messages of the group (s)he is member of.
-		if ($_SESSION['user']!==null)
+		if (!empty($_SESSION['user']))
 		{
 		{
 			$group_memberships=GroupManager::get_group_ids($_course['dbName'],$_SESSION['user']);
 			$group_memberships=GroupManager::get_group_ids($_course['dbName'],$_SESSION['user']);
 			if (is_array($group_memberships))
 			if (is_array($group_memberships))
@@ -1312,10 +1318,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND	( `toolitemproperties`.`to_user_id`=$user_id OR `toolitemproperties`.`to_group_id` IN (0, ".implode(", ", $group_memberships).") )
-					AND `toolitemproperties`.`visibility`='1'
+					WHERE agenda.id = toolitemproperties.ref   ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND	( toolitemproperties.to_user_id=$user_id OR toolitemproperties.to_group_id IN (0, ".implode(", ", $group_memberships).") )
+					AND toolitemproperties.visibility='1'
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 			}
 			}
 			else
 			else
@@ -1323,10 +1329,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND ( `toolitemproperties`.`to_user_id`=$user_id OR `toolitemproperties`.`to_group_id`='0')
-					AND `toolitemproperties`.`visibility`='1'
+					WHERE agenda.id = toolitemproperties.ref   ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND ( toolitemproperties.to_user_id=$user_id OR toolitemproperties.to_group_id='0')
+					AND toolitemproperties.visibility='1'
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 			}
 			}
 		}
 		}
@@ -1337,13 +1343,12 @@ function display_agenda_items()
 			$sql="SELECT
 			$sql="SELECT
 				agenda.*, toolitemproperties.*
 				agenda.*, toolitemproperties.*
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-				WHERE `agenda`.`id` = `toolitemproperties`.`ref`  ".$show_all_current."
-				AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-				AND ( `toolitemproperties`.`to_group_id`=$group_id OR `toolitemproperties`.`to_group_id`='0')
-				AND `toolitemproperties`.`visibility`='1'
-				GROUP BY `toolitemproperties`.`ref`
+				WHERE agenda.id = toolitemproperties.ref  ".$show_all_current."
+				AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+				AND ( toolitemproperties.to_group_id=$group_id OR toolitemproperties.to_group_id='0')
+				AND toolitemproperties.visibility='1'
+				GROUP BY toolitemproperties.ref
 				ORDER BY start_date ".$_SESSION['sort'];
 				ORDER BY start_date ".$_SESSION['sort'];
-
 		}
 		}
 		// A.3 you are a course admin without any group or user filter
 		// A.3 you are a course admin without any group or user filter
 		else
 		else
@@ -1355,10 +1360,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`  ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND `toolitemproperties`.`visibility`='1'
-					GROUP BY `toolitemproperties`.`ref`
+					WHERE agenda.id = toolitemproperties.ref  ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND toolitemproperties.visibility='1'
+					GROUP BY toolitemproperties.ref
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 
 
 			}
 			}
@@ -1369,10 +1374,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`  ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND ( `toolitemproperties`.`visibility`='0' or `toolitemproperties`.`visibility`='1')
-					GROUP BY `toolitemproperties`.`ref`
+					WHERE agenda.id = toolitemproperties.ref  ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND ( toolitemproperties.visibility='0' or toolitemproperties.visibility='1')
+					GROUP BY toolitemproperties.ref
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 			}
 			}
 		}
 		}
@@ -1387,10 +1392,10 @@ function display_agenda_items()
 			$sql="SELECT
 			$sql="SELECT
 				agenda.*, toolitemproperties.*
 				agenda.*, toolitemproperties.*
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 				FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-				WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-				AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-				AND	( `toolitemproperties`.`to_user_id`=$user_id OR `toolitemproperties`.`to_group_id` IN (0, ".implode(", ", $group_memberships).") )
-				AND `toolitemproperties`.`visibility`='1'
+				WHERE agenda.id = toolitemproperties.ref   ".$show_all_current."
+				AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+				AND	( toolitemproperties.to_user_id=$user_id OR toolitemproperties.to_group_id IN (0, ".implode(", ", $group_memberships).") )
+				AND toolitemproperties.visibility='1'
 				ORDER BY start_date ".$_SESSION['sort'];
 				ORDER BY start_date ".$_SESSION['sort'];
 		}
 		}
 		else
 		else
@@ -1400,10 +1405,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND ( `toolitemproperties`.`to_user_id`=$user_id OR `toolitemproperties`.`to_group_id`='0')
-					AND `toolitemproperties`.`visibility`='1'
+					WHERE agenda.id = toolitemproperties.ref   ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND ( toolitemproperties.to_user_id=$user_id OR toolitemproperties.to_group_id='0')
+					AND toolitemproperties.visibility='1'
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 			}
 			}
 			else
 			else
@@ -1411,10 +1416,10 @@ function display_agenda_items()
 				$sql="SELECT
 				$sql="SELECT
 					agenda.*, toolitemproperties.*
 					agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`   ".$show_all_current."
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND `toolitemproperties`.`to_group_id`='0'
-					AND `toolitemproperties`.`visibility`='1'
+					WHERE agenda.id = toolitemproperties.ref   ".$show_all_current."
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND toolitemproperties.to_group_id='0'
+					AND toolitemproperties.visibility='1'
 					ORDER BY start_date ".$_SESSION['sort'];
 					ORDER BY start_date ".$_SESSION['sort'];
 			}
 			}
 		}
 		}
@@ -1638,10 +1643,10 @@ function display_one_agenda_item($agenda_id)
 
 
 	$sql="SELECT agenda.*, toolitemproperties.*
 	$sql="SELECT agenda.*, toolitemproperties.*
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
 					FROM ".$TABLEAGENDA." agenda, ".$TABLE_ITEM_PROPERTY." toolitemproperties
-					WHERE `agenda`.`id` = `toolitemproperties`.`ref`
-					AND `toolitemproperties`.`tool`='".TOOL_CALENDAR_EVENT."'
-					AND `toolitemproperties`.`visibility`='1'
-					AND `agenda`.`id`='$agenda_id'";
+					WHERE agenda.id = toolitemproperties.ref
+					AND toolitemproperties.tool='".TOOL_CALENDAR_EVENT."'
+					AND toolitemproperties.visibility='1'
+					AND agenda.id='$agenda_id'";
 	$result=api_sql_query($sql,__FILE__,__LINE__) or die(mysql_error());
 	$result=api_sql_query($sql,__FILE__,__LINE__) or die(mysql_error());
 	$number_items=mysql_num_rows($result);
 	$number_items=mysql_num_rows($result);
 	$myrow=mysql_fetch_array($result); // there should be only one item so no need for a while loop
 	$myrow=mysql_fetch_array($result); // there should be only one item so no need for a while loop

+ 9 - 10
main/calendar/agenda.php

@@ -1,4 +1,4 @@
-<?php //$Id: agenda.php 12663 2007-06-25 12:25:05Z pcool $
+<?php //$Id: agenda.php 13487 2007-10-16 18:27:53Z yannoo $
 /*
 /*
 ==============================================================================
 ==============================================================================
 	Dokeos - elearning and course management software
 	Dokeos - elearning and course management software
@@ -209,8 +209,7 @@ $tbl_session_course_user= Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USE
 /* ==============================================================================
 /* ==============================================================================
   			ACCESS RIGHTS
   			ACCESS RIGHTS
 ============================================================================== */
 ============================================================================== */
-// permission stuff
-$is_allowedToEdit 	= is_allowed_to_edit();
+// permission stuff - also used by loading from global in agenda.inc.php
 $is_allowed_to_edit = is_allowed_to_edit();
 $is_allowed_to_edit = is_allowed_to_edit();
 
 
 /* ==============================================================================
 /* ==============================================================================
@@ -243,8 +242,8 @@ if (($select_year==NULL) && ($select_month==NULL))
 
 
 
 
 
 
-echo "<table width=\"100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">"
-		. "<tr>";
+echo '<table width="100%" border="0" cellspacing="0" cellpadding="0">'
+		. '<tr>';
 
 
 // THE LEFT PART
 // THE LEFT PART
 if ($_GET['origin']!='learnpath')
 if ($_GET['origin']!='learnpath')
@@ -252,18 +251,18 @@ if ($_GET['origin']!='learnpath')
 	echo '<td width="220" height="19" valign="top">';
 	echo '<td width="220" height="19" valign="top">';
 	// the small calendar
 	// the small calendar
 	$MonthName = $MonthsLong[$select_month -1];
 	$MonthName = $MonthsLong[$select_month -1];
-	$agenda_items=get_kalender_items($select_month,$select_year);
+	$agenda_items=get_calendar_items($select_month,$select_year);
 	display_minimonthcalendar($agenda_items, $select_month,$select_year, $MonthName);
 	display_minimonthcalendar($agenda_items, $select_month,$select_year, $MonthName);
 	// the links for adding, filtering, showall, ...
 	// the links for adding, filtering, showall, ...
-	echo "<ul id=\"agenda_select\">";
+	echo '<ul id="agenda_select">';
 	if (is_allowed_to_edit())
 	if (is_allowed_to_edit())
 	{
 	{
 		display_courseadmin_links();
 		display_courseadmin_links();
 	}
 	}
 	display_student_links();
 	display_student_links();
-	echo "</ul>";
-	echo "</td>";
-	echo "<td width=\"20\" background=\"../img/verticalruler.gif\">&nbsp;</td>";
+	echo '</ul>';
+	echo '</td>';
+	echo '<td width="20" background="../img/verticalruler.gif">&nbsp;</td>';
 }
 }
 
 
 $fck_attribute['Width'] = '600';
 $fck_attribute['Width'] = '600';