diff --git a/lam/lib/modules/posixAccount.inc b/lam/lib/modules/posixAccount.inc
index feaacd7de..237282d39 100644
--- a/lam/lib/modules/posixAccount.inc
+++ b/lam/lib/modules/posixAccount.inc
@@ -202,10 +202,10 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 			// self service configuration settings
 			$selfServiceContainer = new htmlResponsiveRow();
 			$selfServiceContainer->add(new htmlResponsiveSelect('posixAccount_pwdHash', getSupportedHashTypes(),
-				['CRYPT-SHA512'], _("Password hash type"), ['pwdHash', get_class($this)]), 12);
-			$selfServiceContainer->add(new htmlResponsiveInputTextarea('posixAccount_shells', implode("\r\n", $this->getShells()), 30, 4, _('Login shells'), ['loginShells', get_class($this)]), 12);
-			$selfServiceContainer->add(new htmlResponsiveInputField(_('Group DN'), 'posixAccount_groupDn', '', ['groupDn', get_class($this)]), 12);
-			$selfServiceContainer->add(new htmlResponsiveInputCheckbox('posixAccount_useOldPwd', false, _('Password change with old password'), ['useOldPwd', get_class($this)]), 12);
+				['CRYPT-SHA512'], _("Password hash type"), ['pwdHash', static::class]), 12);
+			$selfServiceContainer->add(new htmlResponsiveInputTextarea('posixAccount_shells', implode("\r\n", $this->getShells()), 30, 4, _('Login shells'), ['loginShells', static::class]), 12);
+			$selfServiceContainer->add(new htmlResponsiveInputField(_('Group DN'), 'posixAccount_groupDn', '', ['groupDn', static::class]), 12);
+			$selfServiceContainer->add(new htmlResponsiveInputCheckbox('posixAccount_useOldPwd', false, _('Password change with old password'), ['useOldPwd', static::class]), 12);
 			$return['selfServiceSettings'] = $selfServiceContainer;
 		}
 		// profile checks
@@ -1641,7 +1641,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 		$modules = $this->getAccountContainer()->get_type()->getModules();
 		$homeDirAttr = $this->getHomedirAttrName($modules);
 		for ($i = 0; $i < sizeof($lamdaemonServers); $i++) {
-			if (isset($_POST['form_subpage_' . get_class($this) . '_homedir_create_' . $i])) {
+			if (isset($_POST['form_subpage_' . static::class . '_homedir_create_' . $i])) {
 				$remote = new \LAM\REMOTE\Remote();
 				try {
 					$remote->connect($lamdaemonServers[$i]);
@@ -1662,7 +1662,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 					}
 				}
 			}
-			elseif (isset($_POST['form_subpage_' . get_class($this) . '_homedir_delete_' . $i])) {
+			elseif (isset($_POST['form_subpage_' . static::class . '_homedir_delete_' . $i])) {
 				$remote = new \LAM\REMOTE\Remote();
 				try {
 					$remote->connect($lamdaemonServers[$i]);
@@ -1826,7 +1826,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 				if (!$this->isBooleanConfigOptionSet('posixAccount_' . $typeId . '_hidegon') || !$this->isBooleanConfigOptionSet('posixAccount_' . $typeId . '_hideposixGroups')) {
 					$return->addLabel(new htmlOutputText(_('Additional groups')));
 					$additionalGroups = new htmlGroup();
-					$additionalGroups->addElement(new htmlAccountPageButton(get_class($this), 'group', 'open', _('Edit groups')));
+					$additionalGroups->addElement(new htmlAccountPageButton(static::class, 'group', 'open', _('Edit groups')));
 					$additionalGroups->addElement(new htmlHelpLink('addgroup'));
 					$return->addField($additionalGroups);
 				}
@@ -1857,7 +1857,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 					}
 					else {
 						$return->addLabel(new htmlOutputText('&nbsp;', false));
-						$return->addField(new htmlAccountPageButton(get_class($this), 'homedir', 'open', _('Check home directories')));
+						$return->addField(new htmlAccountPageButton(static::class, 'homedir', 'open', _('Check home directories')));
 					}
 				}
 				$selectedShell = [];
@@ -2023,10 +2023,10 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 			$return->addVerticalSpacer('1rem');
 			if ($showGonSync) {
 				$syncButtons = new htmlGroup();
-				$u2gonButton = new htmlAccountPageButton(get_class($this), 'group', 'syncU2GON', _('Sync Unix to group of names'));
+				$u2gonButton = new htmlAccountPageButton(static::class, 'group', 'syncU2GON', _('Sync Unix to group of names'));
 				$syncButtons->addElement($u2gonButton);
 				$syncButtons->addElement(new htmlSpacer('2rem', null));
-				$gon2uButton = new htmlAccountPageButton(get_class($this), 'group', 'syncGON2U', _('Sync group of names to Unix'));
+				$gon2uButton = new htmlAccountPageButton(static::class, 'group', 'syncGON2U', _('Sync group of names to Unix'));
 				$syncButtons->addElement($gon2uButton);
 				$return->add($syncButtons, 12, 12, 12, 'text-center');
 				if ($showWindowsSync) {
@@ -2035,14 +2035,14 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 			}
 			if ($showWindowsSync) {
 				$syncButtons = new htmlGroup();
-				$gon2uButton = new htmlAccountPageButton(get_class($this), 'group', 'syncWin2U', _('Sync Windows to Unix'));
+				$gon2uButton = new htmlAccountPageButton(static::class, 'group', 'syncWin2U', _('Sync Windows to Unix'));
 				$syncButtons->addElement($gon2uButton);
 				$return->add($syncButtons, 12, 12, 12, 'text-center');
 			}
 		}
 
 		$return->addVerticalSpacer('2rem');
-		$backButton = new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Back'));
+		$backButton = new htmlAccountPageButton(static::class, 'attributes', 'back', _('Back'));
 		$return->add($backButton, 12);
 		return $return;
 	}
@@ -2089,7 +2089,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 					$okGroup = new htmlGroup();
 					$okGroup->addElement(new htmlImage('../../graphics/pass.svg', 16, 16));
 					$okGroup->addElement(new htmlSpacer('5px', null));
-					$okGroup->addElement(new htmlAccountPageButton(get_class($this), 'homedir', 'delete_' . $i, _('Delete')));
+					$okGroup->addElement(new htmlAccountPageButton(static::class, 'homedir', 'delete_' . $i, _('Delete')));
 					$return->addField($okGroup);
 				}
 				elseif ($returnValue == 'missing') {
@@ -2097,7 +2097,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 					$failGroup = new htmlGroup();
 					$failGroup->addElement(new htmlImage('../../graphics/del.svg', 16, 16));
 					$failGroup->addElement(new htmlSpacer('5px', null));
-					$failGroup->addElement(new htmlAccountPageButton(get_class($this), 'homedir', 'create_' . $i, _('Create')));
+					$failGroup->addElement(new htmlAccountPageButton(static::class, 'homedir', 'create_' . $i, _('Create')));
 					$return->addField($failGroup);
 				}
 				elseif (trim($returnValue) != '') {
@@ -2116,7 +2116,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 			}
 		}
 		$return->addVerticalSpacer('2rem');
-		$return->add(new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Back')), 12, 12, 12, 'text-center');
+		$return->add(new htmlAccountPageButton(static::class, 'attributes', 'back', _('Back')), 12, 12, 12, 'text-center');
 		return $return;
 	}
 
@@ -2335,11 +2335,11 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 			// user options
 			$configUserContainer = new htmlResponsiveRow();
 			$configUserContainer->add(new htmlSubTitle(_("Users")), 12);
-			foreach ($allScopes[get_class($this)] as $typeId) {
+			foreach ($allScopes[static::class] as $typeId) {
 				if (!(getScopeFromTypeId($typeId) === 'user')) {
 					continue;
 				}
-				if (sizeof($allScopes[get_class($this)]) > 1) {
+				if (sizeof($allScopes[static::class]) > 1) {
 					$title = new htmlDiv(null, new htmlOutputText($typeManager->getConfiguredType($typeId)->getAlias()));
 					$title->setCSSClasses(['bold', 'responsiveLabel']);
 					$configUserContainer->add($title, 12, 6);
@@ -2406,11 +2406,11 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 		if ($hasHostConfig) {
 			$configHostContainer = new htmlResponsiveRow();
 			$configHostContainer->add(new htmlSubTitle(_("Hosts")), 12);
-			foreach ($allScopes[get_class($this)] as $typeId) {
+			foreach ($allScopes[static::class] as $typeId) {
 				if (!(getScopeFromTypeId($typeId) === 'host')) {
 					continue;
 				}
-				if (sizeof($allScopes[get_class($this)]) > 1) {
+				if (sizeof($allScopes[static::class]) > 1) {
 					$title = new htmlDiv(null, new htmlOutputText($typeManager->getConfiguredType($typeId)->getAlias()));
 					$title->setCSSClasses(['bold', 'responsiveLabel']);
 					$configHostContainer->add($title, 12, 6);
@@ -3564,7 +3564,7 @@ class posixAccount extends baseModule implements passwordService, AccountStatusP
 	 * @see passwordService::passwordChangeRequested
 	 */
 	public function passwordChangeRequested($password, $modules, $forcePasswordChange) {
-		if (!in_array(get_class($this), $modules)) {
+		if (!in_array(static::class, $modules)) {
 			return [];
 		}
 		$accountModules = $this->getAccountContainer()->get_type()->getModules();
diff --git a/lam/lib/modules/posixGroup.inc b/lam/lib/modules/posixGroup.inc
index edda96b28..9b24d4569 100644
--- a/lam/lib/modules/posixGroup.inc
+++ b/lam/lib/modules/posixGroup.inc
@@ -240,7 +240,7 @@ class posixGroup extends baseModule implements passwordService {
 				$return->addLabel(new htmlOutputText(_("Group members")));
 				$membersGroup = new htmlGroup();
 				if (!$this->isBooleanConfigOptionSet('posixGroup_autoSyncGon')) {
-					$membersGroup->addElement(new htmlAccountPageButton(get_class($this), 'user', 'open', _('Edit members')));
+					$membersGroup->addElement(new htmlAccountPageButton(static::class, 'user', 'open', _('Edit members')));
 				}
 				$membersGroup->addElement(new htmlHelpLink('members'));
 				$return->addField($membersGroup);
@@ -352,7 +352,7 @@ class posixGroup extends baseModule implements passwordService {
 
 		// back button
 		$return->addVerticalSpacer('2rem');
-		$return->add(new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Back')), 12);
+		$return->add(new htmlAccountPageButton(static::class, 'attributes', 'back', _('Back')), 12);
 
 		return $return;
 	}
@@ -509,8 +509,8 @@ class posixGroup extends baseModule implements passwordService {
 		// configuration options
 		$configContainer = new htmlResponsiveRow();
 		$configContainer->add(new htmlSubTitle(_("Groups")), 12);
-		foreach ($allScopes[get_class($this)] as $typeId) {
-			if (sizeof($allScopes[get_class($this)]) > 1) {
+		foreach ($allScopes[static::class] as $typeId) {
+			if (sizeof($allScopes[static::class]) > 1) {
 				$title = new htmlDiv(null, new htmlOutputText($typeManager->getConfiguredType($typeId)->getAlias()));
 				$title->setCSSClasses(['bold', 'responsiveLabel']);
 				$configContainer->add($title, 12, 6);
@@ -672,7 +672,7 @@ class posixGroup extends baseModule implements passwordService {
 		$this->addSimplePDFField($return, 'cn', _('Group name'));
 		$this->addSimplePDFField($return, 'gidNumber', _('GID number'));
 		$this->addSimplePDFField($return, 'description', _('Description'));
-		if (in_array(get_class($this) . '_memberUidPrimary', $pdfKeys)) {
+		if (in_array(static::class . '_memberUidPrimary', $pdfKeys)) {
 			$members = !empty($this->attributes['memberUid']) ? $this->attributes['memberUid'] : [];
 			if (!empty($this->attributes['gidNumber'])) {
 				$filter = "(&(&" . get_ldap_filter('user') . ")(gidNumber=" . $this->attributes['gidNumber'][0] . "))";
@@ -1288,7 +1288,7 @@ class posixGroup extends baseModule implements passwordService {
 	 * @see passwordService::passwordChangeRequested
 	 */
 	public function passwordChangeRequested($password, $modules, $forcePasswordChange) {
-		if (!in_array(get_class($this), $modules)) {
+		if (!in_array(static::class, $modules)) {
 			return [];
 		}
 		$this->attributes[$this->passwordAttrName][0] = pwd_hash($password, true, $this->moduleSettings['posixAccount_pwdHash'][0]);
diff --git a/lam/lib/modules/pykotaPrinter.inc b/lam/lib/modules/pykotaPrinter.inc
index e9683f05a..e6e343197 100644
--- a/lam/lib/modules/pykotaPrinter.inc
+++ b/lam/lib/modules/pykotaPrinter.inc
@@ -276,7 +276,7 @@ class pykotaPrinter extends baseModule {
 		// printer members
 		$memberLabel = new htmlOutputText(_('Group members'));
 		$container->addLabel($memberLabel);
-		$addMemberButton = new htmlAccountPageButton(get_class($this), 'members', 'open', 'add.svg', true);
+		$addMemberButton = new htmlAccountPageButton(static::class, 'members', 'open', 'add.svg', true);
 		$addMemberButton->setTitle(_('Add'));
 		$memberHelp = new htmlHelpLink('uniqueMember');
 		$memberTable = new htmlTable();
@@ -432,9 +432,9 @@ class pykotaPrinter extends baseModule {
 		$return->add($filterGroup, 12);
 		$return->addVerticalSpacer('2rem');
 		$buttonTable = new htmlGroup();
-		$buttonTable->addElement(new htmlAccountPageButton(get_class($this), 'attributes', 'addMembers', _('Add')));
+		$buttonTable->addElement(new htmlAccountPageButton(static::class, 'attributes', 'addMembers', _('Add')));
 		$buttonTable->addElement(new htmlSpacer('0.5rem', null));
-		$buttonTable->addElement(new htmlAccountPageButton(get_class($this), 'attributes', 'cancel', _('Cancel')));
+		$buttonTable->addElement(new htmlAccountPageButton(static::class, 'attributes', 'cancel', _('Cancel')));
 		$return->add($buttonTable, 12);
 		return $return;
 	}
@@ -447,7 +447,7 @@ class pykotaPrinter extends baseModule {
 	 */
 	function process_members() {
 		$return = [];
-		if (isset($_POST['form_subpage_' . get_class($this) . '_attributes_addMembers']) && isset($_POST['members'])) {
+		if (isset($_POST['form_subpage_' . static::class . '_attributes_addMembers']) && isset($_POST['members'])) {
 			for ($i = 0; $i < sizeof($_POST['members']); $i++) {
 				$this->attributes['uniqueMember'][] = $_POST['members'][$i];
 			}
diff --git a/lam/lib/modules/pykotaUser.inc b/lam/lib/modules/pykotaUser.inc
index 6e8f9297d..3308b41e1 100644
--- a/lam/lib/modules/pykotaUser.inc
+++ b/lam/lib/modules/pykotaUser.inc
@@ -261,9 +261,9 @@ class pykotaUser extends baseModule {
 			'pykotaJobHistory' => _('Job history'),
 		];
 		// self service settings
-		if (get_class($this) == 'pykotaUser') {
+		if (static::class == 'pykotaUser') {
 			$selfServiceContainer = new htmlResponsiveRow();
-			$selfServiceContainer->add(new htmlResponsiveInputField(_('Job suffix'), 'pykotaUser_jobSuffix', null, ['jobSuffix', get_class($this)]), 12);
+			$selfServiceContainer->add(new htmlResponsiveInputField(_('Job suffix'), 'pykotaUser_jobSuffix', null, ['jobSuffix', static::class]), 12);
 			$return['selfServiceSettings'] = $selfServiceContainer;
 		}
 		// configuration checks
@@ -350,10 +350,10 @@ class pykotaUser extends baseModule {
 			$container->addField($balanceGroup);
 			$container->addLabel(new htmlOutputText('&nbsp;', false));
 			$historyGroup = new htmlGroup();
-			$historyGroup->addElement(new htmlAccountPageButton(get_class($this), 'payments', 'open', _('Payment history')));
+			$historyGroup->addElement(new htmlAccountPageButton(static::class, 'payments', 'open', _('Payment history')));
 			if (!$this->getAccountContainer()->isNewAccount && !empty($this->moduleSettings['pykotaUser_jobSuffix'][0])) {
 				$historyGroup->addElement(new htmlSpacer('5px', null));
-				$historyGroup->addElement(new htmlAccountPageButton(get_class($this), 'jobs', 'open', _('Job history')));
+				$historyGroup->addElement(new htmlAccountPageButton(static::class, 'jobs', 'open', _('Job history')));
 			}
 			$historyGroup->addElement(new htmlSpacer('5px', null));
 			$historyGroup->addElement(new htmlHelpLink('pykotaPayments'), true);
@@ -595,7 +595,7 @@ class pykotaUser extends baseModule {
 		}
 		// back button
 		$container->addVerticalSpacer('2rem');
-		$backButton = new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Back'));
+		$backButton = new htmlAccountPageButton(static::class, 'attributes', 'back', _('Back'));
 		$container->add($backButton, 12);
 		return $container;
 	}
@@ -638,7 +638,7 @@ class pykotaUser extends baseModule {
 		$container->add($table, 12);
 		// back button
 		$container->addVerticalSpacer('2rem');
-		$backButton = new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Back'));
+		$backButton = new htmlAccountPageButton(static::class, 'attributes', 'back', _('Back'));
 		$container->add($backButton, 12);
 		return $container;
 	}
@@ -1047,7 +1047,7 @@ class pykotaUser extends baseModule {
 	 */
 	public function checkSelfServiceSettings(&$options, &$profile) {
 		$errors = [];
-		if ((get_class($this) == 'pykotaUser')
+		if ((static::class == 'pykotaUser')
 			&& !empty($options['pykotaUser_jobSuffix'][0])
 			&& !get_preg($options['pykotaUser_jobSuffix'][0], 'dn')) {
 			$errors[] = $this->messages['jobSuffix'][0];