diff --git a/www/lib/CoreLibs/Output/Form/Generate.php b/www/lib/CoreLibs/Output/Form/Generate.php
index 83b54885..fd129a6c 100644
--- a/www/lib/CoreLibs/Output/Form/Generate.php
+++ b/www/lib/CoreLibs/Output/Form/Generate.php
@@ -242,6 +242,7 @@ class Generate extends \CoreLibs\DB\Extended\ArrayIO
 	private $int_pk_name; // primary key, only internal usage
 	/** @var array<mixed> */
 	public $reference_array = []; // reference arrays -> stored in $this->reference_array[$table_name] => [];
+	// NOTE: should be changed to this @var mixed[]
 	/** @var array<mixed> */
 	public $element_list; // element list for elements next to each other as a special sub group
 	/** @var array<mixed> */
@@ -651,8 +652,7 @@ class Generate extends \CoreLibs\DB\Extended\ArrayIO
 		if (
 			isset($this->security_level['delete']) &&
 			$this->base_acl_level >= $this->security_level['delete'] &&
-			(!isset($this->table_array['protected']['value']) ||
-			(isset($this->table_array['protected']['value']) && !$this->table_array['protected']['value'])) &&
+			empty($this->table_array['protected']['value']) &&
 			!$this->error
 		) {
 			if (!is_array($element_list)) {
@@ -663,7 +663,7 @@ class Generate extends \CoreLibs\DB\Extended\ArrayIO
 				//	. is_array($this->element_list[$element_list[$i]]['read_data']) . ' | '
 				//	. $this->element_list[$element_list[$i]]['delete']);
 				// if prefix, set it
-				$prfx = ($this->element_list[$element_list[$i]]['prefix']) ?
+				$prfx = !empty($this->element_list[$element_list[$i]]['prefix']) ?
 					$this->element_list[$element_list[$i]]['prefix'] . '_' :
 					'';
 				// get the primary key
diff --git a/www/lib/CoreLibs/Output/Progressbar.php b/www/lib/CoreLibs/Output/Progressbar.php
index 7b4c1170..55c2df56 100644
--- a/www/lib/CoreLibs/Output/Progressbar.php
+++ b/www/lib/CoreLibs/Output/Progressbar.php
@@ -28,7 +28,7 @@ class ProgressBar
 	public $status = 'new';	// current status (new,show,hide)
 	/** @var float|int */
 	public $step = 0;	// current step
-	/** @var array<string,?int> */
+	/** @var array<string,null|int|float> */
 	public $position = [ // current bar position
 		'left' => null,
 		'top' => null,
@@ -72,7 +72,7 @@ class ProgressBar
 	/** @var string */
 	public $direction = 'right';	// direction of motion (right,left,up,down)
 
-	/** @var array<string,mixed> */
+	/** @var array<string,string|bool|int> */
 	public $frame = ['show' => false];	// ProgressBar Frame
 	/*	'show' => false,	# frame show (true/false)
 		'left' => 200,	# frame position from left
@@ -84,7 +84,8 @@ class ProgressBar
 		'brd_color' => '#dfdfdf #404040 #404040 #dfdfdf'	# frame border color
 	*/
 
-	/** @var array<mixed> */
+	/** @#var array{string}{string: string|int} */
+	/** @var mixed[][] */
 	public $label = [];	// ProgressBar Labels
 	/*	'name' => [	# label name
 			'type' => 'text',	# label type (text,button,step,percent,crossbar)
@@ -164,7 +165,7 @@ class ProgressBar
 	/**
 	 * calculate position in bar step
 	 * @param  float        $step percent step to do
-	 * @return array<mixed>       bar position as array
+	 * @return array<string,int|float> bar position as array
 	 */
 	private function __calculatePosition(float $step): array
 	{
diff --git a/www/lib/FileUpload/qqFileUploader.php b/www/lib/FileUpload/qqFileUploader.php
index e2606d26..539e6adf 100755
--- a/www/lib/FileUpload/qqFileUploader.php
+++ b/www/lib/FileUpload/qqFileUploader.php
@@ -21,12 +21,12 @@ class qqFileUploader // phpcs:ignore Squiz.Classes.ValidClassName.NotCamelCaps
 	/**
 	 * Undocumented function
 	 *
-	 * @param array<mixed> $allowedExtensions
+	 * @param array<string> $allowedExtensions
 	 * @param integer $sizeLimit
 	 */
 	public function __construct(array $allowedExtensions = [], int $sizeLimit = 10485760)
 	{
-		$allowedExtensions = array_map("strtolower", $allowedExtensions);
+		$allowedExtensions = array_map('strtolower', $allowedExtensions);
 
 		$this->allowedExtensions = $allowedExtensions;
 		$this->sizeLimit = $sizeLimit;