diff --git a/MD_STD.php b/MD_STD.php
index 9a2f2a0..32ec335 100644
--- a/MD_STD.php
+++ b/MD_STD.php
@@ -44,7 +44,9 @@ final class MD_STD {
     public static function realpath(string $path):string {
 
         $output = \realpath($path);
-        if (!\is_string($output)) throw new MDFileDoesNotExist("The file {$path} does not exist or is not readable.");
+        if (!\is_string($output)) {
+            throw new MDFileDoesNotExist("The file {$path} does not exist or is not readable.");
+        }
         return $output;
 
     }
@@ -124,7 +126,9 @@ final class MD_STD {
     public static function ob_get_clean():string {
 
         $output = \ob_get_clean();
-        if ($output === false) throw new MDOutputBufferNotStarted("Output buffer was not started");
+        if ($output === false) {
+            throw new MDOutputBufferNotStarted("Output buffer was not started");
+        }
         return $output;
 
     }
@@ -139,8 +143,12 @@ final class MD_STD {
      */
     public static function startsWith(string $haystack, string $needle):bool {
 
-        if (substr($haystack, 0, \strlen($needle)) == $needle) return true;
-        else return false;
+        if (substr($haystack, 0, \strlen($needle)) === $needle) {
+            return true;
+        }
+        else {
+            return false;
+        }
 
     }
 
@@ -157,7 +165,9 @@ final class MD_STD {
         $output = false;
         foreach ($needles as $needle) {
             $output = self::startsWith($haystack, $needle);
-            if ($output == true) return $output;
+            if ($output == true) {
+                return $output;
+            }
         }
         return $output;
 
@@ -197,7 +207,9 @@ final class MD_STD {
     public static function json_encode(array $value, int $options = 0, int $depth = 512):string {
 
         $output = \json_encode($value, $options, $depth);
-        if ($output === false) throw new Exception("JSON output could not be generated");
+        if ($output === false) {
+            throw new Exception("JSON output could not be generated");
+        }
         return $output;
 
     }
@@ -212,7 +224,9 @@ final class MD_STD {
     public static function strtotime(string $datetime):int {
 
         $output = \strtotime($datetime);
-        if ($output === false) throw new MDInvalidInputDate("Invalid input date {$datetime}.");
+        if ($output === false) {
+            throw new MDInvalidInputDate("Invalid input date {$datetime}.");
+        }
         return $output;
 
     }
@@ -268,7 +282,9 @@ final class MD_STD {
         // if ($errmsg  = curl_error($curl)) echo $errmsg;
 
         \curl_close($curl);
-        if (\is_bool($result)) return "";
+        if (\is_bool($result)) {
+            return "";
+        }
         return $result;
 
     }
@@ -333,7 +349,9 @@ final class MD_STD {
 
         // $_SERVER['HTTP_ACCEPT_LANGUAGE'] verwenden, wenn keine Sprachvariable mitgegeben wurde
         if ($lang_variable === "") {
-            if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) $lang_variable = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
+            if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
+                $lang_variable = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
+            }
         }
 
         // wurde irgendwelche Information mitgeschickt?
@@ -344,7 +362,9 @@ final class MD_STD {
 
         // Den Header auftrennen
         $accepted_languages = preg_split('/,\s*/', $lang_variable);
-        if (!is_array($accepted_languages)) return $default_language;
+        if (!is_array($accepted_languages)) {
+            return $default_language;
+        }
 
         // Die Standardwerte einstellen
         $current_lang = $default_language;
@@ -453,7 +473,9 @@ final class MD_STD {
     public static function openssl_random_pseudo_bytes(int $length):string {
 
         $output = \openssl_random_pseudo_bytes($length);
-        if ($output === false) throw new Exception("Failed generating random pseudo bytes using openssl_random_pseudo_bytes");
+        if ($output === false) {
+            throw new Exception("Failed generating random pseudo bytes using openssl_random_pseudo_bytes");
+        }
         return $output;
 
     }
@@ -469,7 +491,9 @@ final class MD_STD {
 
         $input = \explode(PHP_EOL, $input);
         $output = "";
-        foreach ($input as $line) $output .= \trim($line) . PHP_EOL;
+        foreach ($input as $line) {
+            $output .= \trim($line) . PHP_EOL;
+        }
         return $output;
 
     }
@@ -572,8 +596,12 @@ final class MD_STD {
      */
     public static function levenshtein(string $str1, string $str2):int {
 
-        if (\strlen($str1) > 250) $str1 = \substr($str1, 0, 250);
-        if (\strlen($str2) > 250) $str2 = \substr($str2, 0, 250);
+        if (\strlen($str1) > 250) {
+            $str1 = \substr($str1, 0, 250);
+        }
+        if (\strlen($str2) > 250) {
+            $str2 = \substr($str2, 0, 250);
+        }
 
         return \levenshtein($str1, $str2);
 
diff --git a/MD_STD_CACHE.php b/MD_STD_CACHE.php
index 097c0e7..99049ac 100644
--- a/MD_STD_CACHE.php
+++ b/MD_STD_CACHE.php
@@ -48,7 +48,9 @@ final class MD_STD_CACHE {
      */
     public static function serve_page_through_redis_cache(string $redisKey, int $expiry = 3600):string {
 
-        if (PHP_SAPI === 'cli') return '';
+        if (PHP_SAPI === 'cli') {
+            return '';
+        }
 
         $redis = new Redis();
         $redis->connect(self::$redis_host, self::$redis_port, 1, null, 0, 0, ['auth' => [MD_CONF::$redis_pw]]);
diff --git a/MD_STD_IN.php b/MD_STD_IN.php
index fb0102a..6831f18 100644
--- a/MD_STD_IN.php
+++ b/MD_STD_IN.php
@@ -44,7 +44,9 @@ final class MD_STD_IN {
      */
     public static function sanitize_id_or_zero($input):int {
 
-        if ($input === "") return 0;
+        if ($input === "") {
+            return 0;
+        }
 
         $input = \filter_var($input, \FILTER_VALIDATE_INT, [
                 'options' => [
@@ -76,7 +78,9 @@ final class MD_STD_IN {
             FILTER_SANITIZE_STRING,
             FILTER_FLAG_NO_ENCODE_QUOTES);
 
-        if ($output === false) return "";
+        if ($output === false) {
+            return "";
+        }
         while (strpos($output, "  ") !== false) {
             $output = str_replace("  ", " ", $output);
         }
@@ -126,7 +130,9 @@ final class MD_STD_IN {
         else if (isset($_POST[$var_name])) {
             $output = self::sanitize_text($_POST[$var_name]);
         }
-        else $output = self::sanitize_text($default);
+        else {
+            $output = self::sanitize_text($default);
+        }
 
         if (!empty($allowed) and !\in_array($output, $allowed, true)) {
             throw new MDpageParameterNotFromListException("Parameter `{$var_name}` must be any of the allowed values: '" . implode('\', \'', $allowed) . "'");
@@ -151,7 +157,9 @@ final class MD_STD_IN {
         if (isset($_POST[$var_name])) {
             $output = self::sanitize_text($_POST[$var_name]);
         }
-        else $output = self::sanitize_text($default);
+        else {
+            $output = self::sanitize_text($default);
+        }
 
         if (!empty($allowed) and !\in_array($output, $allowed, true)) {
             throw new MDpageParameterNotFromListException("Parameter `{$var_name}` must be any of the allowed values: '" . implode('\', \'', $allowed) . "'");
@@ -170,7 +178,9 @@ final class MD_STD_IN {
      */
     public static function sanitize_url($input):string {
 
-        if ($input === "") return "";
+        if ($input === "") {
+            return "";
+        }
 
         $output = \filter_var($input, FILTER_SANITIZE_URL);
         if (($output = \filter_var($output, FILTER_VALIDATE_URL)) === false) {
@@ -190,7 +200,9 @@ final class MD_STD_IN {
      */
     public static function sanitize_email($input):string {
 
-        if ($input === "") return "";
+        if ($input === "") {
+            return "";
+        }
 
         $output = \filter_var($input, FILTER_SANITIZE_EMAIL);
         if (($output = \filter_var($output, FILTER_VALIDATE_EMAIL)) === false) {
@@ -227,7 +239,9 @@ final class MD_STD_IN {
      */
     public static function validate_isbn(string $input):string {
 
-        if ($input === "") return "";
+        if ($input === "") {
+            return "";
+        }
 
         // Remove hyphens
         $input = trim(strtr($input, ["-" => "", "–" => ""]));
diff --git a/MD_STD_SEC.php b/MD_STD_SEC.php
index 0c3afee..b9f92f3 100644
--- a/MD_STD_SEC.php
+++ b/MD_STD_SEC.php
@@ -68,7 +68,9 @@ final class MD_STD_SEC {
         $logfile_common = \sys_get_temp_dir() . "/logins_{$tool_name}.json";
 
         // Ensure the log files exist
-        if (!\file_exists($logfile_common)) \file_put_contents($logfile_common, "[]");
+        if (!\file_exists($logfile_common)) {
+            \file_put_contents($logfile_common, "[]");
+        }
 
         // Hash entered username and IP to prevent malicious strings from
         // entering the system.