diff --git a/actions/admin/settings/100.panel.php b/actions/admin/settings/100.panel.php
index d5be46cc..faf53644 100644
--- a/actions/admin/settings/100.panel.php
+++ b/actions/admin/settings/100.panel.php
@@ -31,7 +31,10 @@ return array(
 					'type' => 'option',
 					'default' => 'English',
 					'option_mode' => 'one',
-					'option_options_method' => array('\\Froxlor\\User', 'getLanguages'),
+					'option_options_method' => array(
+						'\\Froxlor\\User',
+						'getLanguages'
+					),
 					'save_method' => 'storeSettingField'
 				),
 				'panel_default_theme' => array(
@@ -44,7 +47,10 @@ return array(
 					'type' => 'option',
 					'default' => 'Froxlor',
 					'option_mode' => 'one',
-					'option_options_method' => 'getThemes',
+					'option_options_method' => array(
+						'\\Froxlor\\UI\\Template',
+						'getThemes'
+					),
 					'save_method' => 'storeSettingDefaultTheme'
 				),
 				'panel_allow_theme_change_customer' => array(
diff --git a/admin_index.php b/admin_index.php
index 6bc7dfb3..9f180887 100644
--- a/admin_index.php
+++ b/admin_index.php
@@ -300,7 +300,7 @@ if ($page == 'overview') {
 			$default_theme = $userinfo['theme'];
 		}
 
-		$themes_avail = getThemes();
+		$themes_avail = \Froxlor\UI\Template::getThemes();
 		foreach ($themes_avail as $t => $d) {
 			$theme_options .= \Froxlor\UI\HTML::makeoption($d, $t, $default_theme, true);
 		}
diff --git a/admin_settings.php b/admin_settings.php
index 85bcdb73..2822e70c 100644
--- a/admin_settings.php
+++ b/admin_settings.php
@@ -59,7 +59,7 @@ if ($page == 'overview' && $userinfo['change_serversettings'] == '1') {
 			\Froxlor\UI\Response::standard_error($lng['error']['session_timeout'], $lng['error']['session_timeout_desc']);
 		}
 
-		if (processFormEx($settings_data, $_POST, array(
+		if (\Froxlor\UI\Form::processFormEx($settings_data, $_POST, array(
 			'filename' => $filename,
 			'action' => $action,
 			'page' => $page
diff --git a/customer_index.php b/customer_index.php
index 25ea15b2..1bdcf416 100644
--- a/customer_index.php
+++ b/customer_index.php
@@ -271,7 +271,7 @@ if ($page == 'overview') {
 		}
 
 		$theme_options = '';
-		$themes_avail = getThemes();
+		$themes_avail = \Froxlor\UI\Template::getThemes();
 		foreach ($themes_avail as $t => $d) {
 			$theme_options .= \Froxlor\UI\HTML::makeoption($d, $t, $default_theme, true);
 		}
diff --git a/install/updates/preconfig/0.9/preconfig_0.9.inc.php b/install/updates/preconfig/0.9/preconfig_0.9.inc.php
index b6432c33..706906d4 100644
--- a/install/updates/preconfig/0.9/preconfig_0.9.inc.php
+++ b/install/updates/preconfig/0.9/preconfig_0.9.inc.php
@@ -382,7 +382,7 @@ function parseAndOutputPreconfig(&$has_preconfig, &$return, $current_version, $c
 		$description = 'As you can (obviously) see, Froxlor now comes with a new theme. You also have the possibility to switch back to "Classic" if you want to.';
 		$question = '<strong>Select default panel theme:</strong>&nbsp;';
 		$question .= '<select name="update_default_theme">';
-		$themes = getThemes();
+		$themes = \Froxlor\UI\Template::getThemes();
 		foreach ($themes as $cur_theme) // $theme is already in use
 		{
 			$question .= makeoption($cur_theme, $cur_theme, 'Froxlor');
@@ -401,7 +401,7 @@ function parseAndOutputPreconfig(&$has_preconfig, &$return, $current_version, $c
 
 		$question = '<strong>Select your preferred Classic Theme replacement:</strong>&nbsp;';
 		$question .= '<select name="classic_theme_replacement">';
-		$themes = getThemes();
+		$themes = \Froxlor\UI\Template::getThemes();
 		foreach ($themes as $cur_theme) {
 			$question .= makeoption($cur_theme, $cur_theme, 'Froxlor');
 		}
diff --git a/lib/Froxlor/UI/Form.php b/lib/Froxlor/UI/Form.php
index e894eb97..c39fc6f7 100644
--- a/lib/Froxlor/UI/Form.php
+++ b/lib/Froxlor/UI/Form.php
@@ -10,13 +10,13 @@ class Form
 	{
 		$fields = '';
 
-		if (validateFormDefinition($form)) {
+		if (\Froxlor\Validate\Form::validateFormDefinition($form)) {
 			foreach ($form['groups'] as $groupname => $groupdetails) {
 				if (isset($groupdetails['title']) && $groupdetails['title'] != '') {
 					$fields .= self::getFormGroupOutput($groupname, $groupdetails);
 				}
 
-				if (validateFieldDefinition($groupdetails)) {
+				if (\Froxlor\Validate\Form::validateFieldDefinition($groupdetails)) {
 					// Prefetch form fields
 					foreach ($groupdetails['fields'] as $fieldname => $fielddetails) {
 						$groupdetails['fields'][$fieldname] = self::array_merge_prefix($fielddetails, $fielddetails['type'], prefetchFormFieldData($fieldname, $fielddetails));
@@ -38,7 +38,7 @@ class Form
 	{
 		$fields = '';
 
-		if (validateFormDefinition($form)) {
+		if (\Froxlor\Validate\Form::validateFormDefinition($form)) {
 			foreach ($form['groups'] as $groupname => $groupdetails) {
 				// show overview
 				if ($part == '') {
@@ -73,10 +73,10 @@ class Form
 						$fields .= self::getFormGroupOutput($groupname, $groupdetails);
 					}
 
-					if (validateFieldDefinition($groupdetails)) {
+					if (\Froxlor\Validate\Form::validateFieldDefinition($groupdetails)) {
 						// Prefetch form fields
 						foreach ($groupdetails['fields'] as $fieldname => $fielddetails) {
-							$groupdetails['fields'][$fieldname] = self::array_merge_prefix($fielddetails, $fielddetails['type'], prefetchFormFieldData($fieldname, $fielddetails));
+							$groupdetails['fields'][$fieldname] = self::array_merge_prefix($fielddetails, $fielddetails['type'], self::prefetchFormFieldData($fieldname, $fielddetails));
 							$form['groups'][$groupname]['fields'][$fieldname] = $groupdetails['fields'][$fieldname];
 						}
 
@@ -93,7 +93,7 @@ class Form
 		return $fields;
 	}
 
-	function processForm(&$form, &$input, $url_params = array())
+	public static function processForm(&$form, &$input, $url_params = array())
 	{
 		if (\Froxlor\Validate\Form::validateFormDefinition($form)) {
 			$submitted_fields = array();
@@ -188,9 +188,9 @@ class Form
 		}
 	}
 
-	function processFormEx(&$form, &$input, $url_params = array(), $part, $settings_all, $settings_part, $only_enabledisable)
+	public static function processFormEx(&$form, &$input, $url_params = array(), $part, $settings_all, $settings_part, $only_enabledisable)
 	{
-		if (validateFormDefinition($form)) {
+		if (\Froxlor\Validate\Form::validateFormDefinition($form)) {
 			$submitted_fields = array();
 			$changed_fields = array();
 			$saved_fields = array();
@@ -201,7 +201,7 @@ class Form
 						// Prefetch form fields
 						foreach ($groupdetails['fields'] as $fieldname => $fielddetails) {
 							if (! $only_enabledisable || ($only_enabledisable && isset($fielddetails['overview_option']))) {
-								$groupdetails['fields'][$fieldname] = self::array_merge_prefix($fielddetails, $fielddetails['type'], prefetchFormFieldData($fieldname, $fielddetails));
+								$groupdetails['fields'][$fieldname] = self::array_merge_prefix($fielddetails, $fielddetails['type'], self::prefetchFormFieldData($fieldname, $fielddetails));
 								$form['groups'][$groupname]['fields'][$fieldname] = $groupdetails['fields'][$fieldname];
 							}
 						}
@@ -233,7 +233,7 @@ class Form
 
 			foreach ($form['groups'] as $groupname => $groupdetails) {
 				if (($settings_part && $part == $groupname) || $settings_all || $only_enabledisable) {
-					if (validateFieldDefinition($groupdetails)) {
+					if (\Froxlor\Validate\Form::validateFieldDefinition($groupdetails)) {
 						// Check fields for plausibility
 						foreach ($groupdetails['fields'] as $fieldname => $fielddetails) {
 							if (! $only_enabledisable || ($only_enabledisable && isset($fielddetails['overview_option']))) {
@@ -276,7 +276,7 @@ class Form
 
 			foreach ($form['groups'] as $groupname => $groupdetails) {
 				if (($settings_part && $part == $groupname) || $settings_all || $only_enabledisable) {
-					if (validateFieldDefinition($groupdetails)) {
+					if (\Froxlor\Validate\Form::validateFieldDefinition($groupdetails)) {
 						// Save fields
 						foreach ($groupdetails['fields'] as $fieldname => $fielddetails) {
 							if (! $only_enabledisable || ($only_enabledisable && isset($fielddetails['overview_option']))) {
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 08b77d0f..6fa022aa 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -36,7 +36,8 @@ require dirname(__DIR__) . '/vendor/autoload.php';
 require dirname(__DIR__) . '/lib/tables.inc.php';
 
 // include consts
-require dirname(__DIR__) . '/lib/functions/logger/constant.logger.php';
+require dirname(__DIR__) . '/lib/functions/constant.formfields.php';
+require dirname(__DIR__) . '/lib/functions/constant.logger.php';
 
 use Froxlor\Database\Database;
 use Froxlor\Settings;
diff --git a/tests/linting.php b/tests/linting.php
new file mode 100644
index 00000000..ebc9734e
--- /dev/null
+++ b/tests/linting.php
@@ -0,0 +1,29 @@
+<?php
+
+require dirname(__DIR__) . '/vendor/autoload.php';
+// Includes the Functions
+require \Froxlor\Froxlor::getInstallDir() . '/lib/functions/constant.formfields.php';
+require \Froxlor\Froxlor::getInstallDir() . '/lib/functions/constant.logger.php';
+
+// Includes the MySQL-Tabledefinitions etc.
+require \Froxlor\Froxlor::getInstallDir() . '/lib/tables.inc.php';
+
+$functions = get_defined_functions();
+$calls = array();
+foreach ($functions['user'] as $func) {
+
+	// grep for function
+	exec('grep -ir "'.$func.'" '.dirname(__DIR__).'/lib/', $output);
+	exec('grep -ir "'.$func.'" '.dirname(__DIR__).'/install/', $output);
+	exec('grep -ir "'.$func.'" '.dirname(__DIR__).'/actions/', $output);
+	exec('grep -ir "'.$func.'" '.dirname(__DIR__).'/*.php', $output);
+	echo "***********************************************".PHP_EOL;
+	echo "******* ". $func." ************************".PHP_EOL;
+	echo "***********************************************".PHP_EOL;
+	foreach ($output as $file) {
+		echo str_replace(dirname(__DIR__), "", $file) . PHP_EOL;
+	}
+	echo PHP_EOL;
+	$output = array();
+}
+