diff --git a/api/src/Mail.php b/api/src/Mail.php
index 24bfe313a2..a576075c40 100644
--- a/api/src/Mail.php
+++ b/api/src/Mail.php
@@ -3391,7 +3391,7 @@ class Mail
 		//highest precedence
 		try
 		{
-			$_folderName = $this->icServer->$types[$_type]['profileKey'];
+			$_folderName = $this->icServer->{$types[$_type]['profileKey']};
 		}
 		catch (\Exception $e)
 		{
diff --git a/calendar/inc/class.calendar_export_csv.inc.php b/calendar/inc/class.calendar_export_csv.inc.php
index 4d334f9bb9..72eff6edf4 100644
--- a/calendar/inc/class.calendar_export_csv.inc.php
+++ b/calendar/inc/class.calendar_export_csv.inc.php
@@ -103,7 +103,7 @@ class calendar_export_csv implements importexport_iface_export_plugin {
 							if(method_exists($ui, $states['view']))
 							{
 								ob_start();
-								$ui->$states['view']();
+								$ui->{$states['view']}();
 								ob_end_clean();
 							}
 							$query += array(
diff --git a/calendar/inc/class.calendar_export_ical.inc.php b/calendar/inc/class.calendar_export_ical.inc.php
index 265dadaf2e..7e5b271eb8 100644
--- a/calendar/inc/class.calendar_export_ical.inc.php
+++ b/calendar/inc/class.calendar_export_ical.inc.php
@@ -95,7 +95,7 @@ class calendar_export_ical extends calendar_export_csv {
 						if(method_exists($ui, $states['view']))
 						{
 							ob_start();
-							$ui->$states['view']();
+							$ui->{$states['view']}();
 							ob_end_clean();
 						}
 						$query += array(
diff --git a/importexport/inc/class.importexport_definitions_ui.inc.php b/importexport/inc/class.importexport_definitions_ui.inc.php
index e93d22dc7a..806699daaf 100644
--- a/importexport/inc/class.importexport_definitions_ui.inc.php
+++ b/importexport/inc/class.importexport_definitions_ui.inc.php
@@ -58,7 +58,7 @@ class importexport_definitions_ui
 		error_reporting(E_ALL & ~E_NOTICE & ~E_WARNING);
 		Api\Translation::add_app(self::_appname);
 		$GLOBALS['egw_info']['flags']['currentapp'] = self::_appname;
-		
+
 		$this->etpl = new Etemplate();
 		$this->clock = Api\Html::image(self::_appname,'clock');
 		$this->steps = array(
@@ -544,11 +544,11 @@ class importexport_definitions_ui
 				}
 				if(!key_exists($content['step'],$this->steps))
 				{
-					$next_step = $this->plugin->$content['step']($content,$sel_options,$readonlys,$preserv);
+					$next_step = $this->plugin->{$content['step']}($content,$sel_options,$readonlys,$preserv);
 				}
 				else
 				{
-					$next_step = $this->$content['step']($content,$sel_options,$readonlys,$preserv);
+					$next_step = $this->{$content['step']}($content,$sel_options,$readonlys,$preserv);
 				}
 			}
 			else
@@ -578,15 +578,15 @@ class importexport_definitions_ui
 				{
 					if(!key_exists($content['step'],$this->steps))
 					{
-						$next_step = $this->plugin->$content['step']($content);
+						$next_step = $this->plugin->{$content['step']}($content);
 					}
 					else
 					{
-						$next_step = $this->$content['step']($content);
+						$next_step = $this->{$content['step']}($content);
 					}
 				}
 			} while($this->wizard_content_template == self::SKIP);
-			
+
 			if(!$this->can_edit($content))
 			{
 				$readonlys[$this->wizard_content_template] = true;
@@ -868,7 +868,7 @@ class importexport_definitions_ui
 				$content['no_all_users'] = true;
 			}
 			unset ($preserv['button']);
-			
+
 			$readonlys['button[next]'] = true;
 			return 'importexport.wizard_chooseallowedusers';
 		}
diff --git a/resources/inc/class.resources_import_csv.inc.php b/resources/inc/class.resources_import_csv.inc.php
index 8a126282be..1901600e1b 100644
--- a/resources/inc/class.resources_import_csv.inc.php
+++ b/resources/inc/class.resources_import_csv.inc.php
@@ -107,15 +107,15 @@ class resources_import_csv extends importexport_basic_import_csv  {
 		if(!$record->accessory_of) $record->accessory_of = -1;
 		//error_log(__METHOD__.__LINE__.array2string($_definition->plugin_options['conditions']));
 		if ($this->definition->plugin_options['conditions']) {
-		
+
 			foreach ( $this->definition->plugin_options['conditions'] as $condition ) {
 				$results = array();
 				switch ( $condition['type'] ) {
 					// exists
 					case 'exists' :
-						if($record->$condition['string']) {
+						if($record->{$condition['string']}) {
 							$results = $this->bo->so->search(
-								array( $condition['string'] => $record->$condition['string']),
+								array( $condition['string'] => $record->{$condition['string']}),
 								False
 							);
 						}
@@ -170,7 +170,7 @@ class resources_import_csv extends importexport_basic_import_csv  {
 
 				// Merge to deal with fields not in import record
 				$_data = array_merge($old, $_data);
-				
+
 				// Fall through
 			case 'insert' :
 				if($_action == 'insert') {
@@ -193,7 +193,7 @@ class resources_import_csv extends importexport_basic_import_csv  {
 				}
 			default:
 				throw new Api\Exception('Unsupported action');
-			
+
 		}
 	}