diff --git a/DataStorage/Cache/Connection/FileCache.php b/DataStorage/Cache/Connection/FileCache.php
index b1aefd447..e924953d2 100644
--- a/DataStorage/Cache/Connection/FileCache.php
+++ b/DataStorage/Cache/Connection/FileCache.php
@@ -70,7 +70,7 @@ class FileCache extends ConnectionAbstract
         }
 
         $this->status = CacheStatus::ACTIVE;
-        $this->con    = realpath($path);
+        $this->con    = \realpath($path);
     }
 
     /**
@@ -90,7 +90,7 @@ class FileCache extends ConnectionAbstract
             return false;
         }
 
-        array_map('unlink', glob($this->con . '/*'));
+        \array_map('unlink', \glob($this->con . '/*'));
 
         return true;
     }
@@ -128,7 +128,7 @@ class FileCache extends ConnectionAbstract
 
         $path = Directory::sanitize($key, self::SANITIZE);
 
-        File::put($this->con . '/' . trim($path, '/') . '.cache', $this->build($value, $expire));
+        File::put($this->con . '/' . \trim($path, '/') . '.cache', $this->build($value, $expire));
     }
 
     /**
@@ -180,15 +180,15 @@ class FileCache extends ConnectionAbstract
      */
     private function dataType($value) : int
     {
-        if (is_int($value)) {
+        if (\is_int($value)) {
             return CacheValueType::_INT;
-        } elseif (is_float($value)) {
+        } elseif (\is_float($value)) {
             return CacheValueType::_FLOAT;
-        } elseif (is_string($value)) {
+        } elseif (\is_string($value)) {
             return CacheValueType::_STRING;
-        } elseif (is_bool($value)) {
+        } elseif (\is_bool($value)) {
             return CacheValueType::_BOOL;
-        } elseif (is_array($value)) {
+        } elseif (\is_array($value)) {
             return CacheValueType::_ARRAY;
         } elseif ($value === null) {
             return CacheValueType::_NULL;
@@ -220,9 +220,9 @@ class FileCache extends ConnectionAbstract
         } elseif ($type === CacheValueType::_ARRAY) {
             return \json_encode($value);
         } elseif ($type === CacheValueType::_SERIALIZABLE) {
-            return get_class($value) . self::DELIM . $value->serialize();
+            return \get_class($value) . self::DELIM . $value->serialize();
         } elseif ($type === CacheValueType::_JSONSERIALIZABLE) {
-            return get_class($value) . self::DELIM . $value->jsonSerialize();
+            return \get_class($value) . self::DELIM . $value->jsonSerialize();
         } elseif ($type === CacheValueType::_NULL) {
             return '';
         }
@@ -263,7 +263,7 @@ class FileCache extends ConnectionAbstract
         }
 
         $created = Directory::created($path)->getTimestamp();
-        $now     = time();
+        $now     = \time();
 
         if ($expire >= 0 && $created + $expire < $now) {
             return null;
@@ -377,7 +377,7 @@ class FileCache extends ConnectionAbstract
         }
 
         $dir = new Directory($this->con);
-        $now = time();
+        $now = \time();
 
         foreach ($dir as $file) {
             if ($file instanceof File) {
@@ -425,6 +425,6 @@ class FileCache extends ConnectionAbstract
     private function getPath($key) : string
     {
         $path = Directory::sanitize($key, self::SANITIZE);
-        return $this->con . '/' . trim($path, '/') . '.cache';
+        return $this->con . '/' . \trim($path, '/') . '.cache';
     }
 }
diff --git a/DataStorage/Database/DataMapperAbstract.php b/DataStorage/Database/DataMapperAbstract.php
index 7fdc775b9..bf0331ea1 100644
--- a/DataStorage/Database/DataMapperAbstract.php
+++ b/DataStorage/Database/DataMapperAbstract.php
@@ -895,7 +895,7 @@ class DataMapperAbstract implements DataMapperInterface
             return $value->serialize();
         } elseif ($value instanceof \JsonSerializable) {
             return \json_encode($value->jsonSerialize());
-        } elseif (is_object($value) && method_exists($value, 'getId')) {
+        } elseif (is_object($value) && \method_exists($value, 'getId')) {
             return $value->getId();
         }
 
@@ -1918,7 +1918,7 @@ class DataMapperAbstract implements DataMapperInterface
 
             $obj[$value] = self::populate(self::getRaw($value), $toFill);
 
-            if (method_exists($obj[$value], 'initialize')) {
+            if (\method_exists($obj[$value], 'initialize')) {
                 $obj[$value]->initialize();
             }
 
diff --git a/DataStorage/Database/Query/Builder.php b/DataStorage/Database/Query/Builder.php
index ad37a3625..404e75e57 100644
--- a/DataStorage/Database/Query/Builder.php
+++ b/DataStorage/Database/Query/Builder.php
@@ -260,7 +260,7 @@ final class Builder extends BuilderAbstract
         $this->type = QueryType::SELECT;
 
         foreach ($columns as $key => $column) {
-            if (is_string($column) || $column instanceof \Closure) {
+            if (\is_string($column) || $column instanceof \Closure) {
                 $this->selects[] = $column;
             } else {
                 throw new \InvalidArgumentException();
@@ -301,9 +301,9 @@ final class Builder extends BuilderAbstract
      */
     public function bind($binds) : Builder
     {
-        if (is_array($binds)) {
+        if (\is_array($binds)) {
             $this->binds += $binds;
-        } elseif (is_string($binds) || $binds instanceof \Closure) {
+        } elseif (\is_string($binds) || $binds instanceof \Closure) {
             $this->binds[] = $binds;
         } else {
             throw new \InvalidArgumentException();
@@ -366,7 +366,7 @@ final class Builder extends BuilderAbstract
         }
 
         $this->type = QueryType::RAW;
-        $this->raw  = rtrim($raw, ';');
+        $this->raw  = \rtrim($raw, ';');
 
         return $this;
     }
@@ -387,14 +387,14 @@ final class Builder extends BuilderAbstract
             return true;
         }
 
-        $test = strtolower($raw);
+        $test = \strtolower($raw);
 
-        if (strpos($test, 'insert') !== false
-            || strpos($test, 'update') !== false
-            || strpos($test, 'drop') !== false
-            || strpos($test, 'delete') !== false
-            || strpos($test, 'create') !== false
-            || strpos($test, 'alter') !== false
+        if (\strpos($test, 'insert') !== false
+            || \strpos($test, 'update') !== false
+            || \strpos($test, 'drop') !== false
+            || \strpos($test, 'delete') !== false
+            || \strpos($test, 'create') !== false
+            || \strpos($test, 'alter') !== false
         ) {
             return false;
         }
@@ -444,7 +444,7 @@ final class Builder extends BuilderAbstract
     public function from(...$tables) : Builder
     {
         foreach ($tables as $key => $table) {
-            if (is_string($table) || $table instanceof \Closure) {
+            if (\is_string($table) || $table instanceof \Closure) {
                 $this->from[] = $table;
             } else {
                 throw new \InvalidArgumentException();
@@ -486,11 +486,11 @@ final class Builder extends BuilderAbstract
      */
     public function where($columns, $operator = null, $values = null, $boolean = 'and') : Builder
     {
-        if ($operator !== null && !is_array($operator) && !\in_array(strtolower($operator), self::OPERATORS)) {
+        if ($operator !== null && !\is_array($operator) && !\in_array(strtolower($operator), self::OPERATORS)) {
             throw new \InvalidArgumentException('Unknown operator.');
         }
 
-        if (!is_array($columns)) {
+        if (!\is_array($columns)) {
             $columns  = [$columns];
             $operator = [$operator];
             $values   = [$values];
@@ -545,11 +545,11 @@ final class Builder extends BuilderAbstract
      */
     public function getTableOfSystem($expression, string $systemIdentifier) : ?string
     {
-        if (($pos = strpos($expression, $systemIdentifier . '.' . $systemIdentifier)) === false) {
+        if (($pos = \strpos($expression, $systemIdentifier . '.' . $systemIdentifier)) === false) {
             return null;
         }
 
-        return explode('.', $expression)[0];
+        return \explode('.', $expression)[0];
     }
 
     /**
@@ -648,7 +648,7 @@ final class Builder extends BuilderAbstract
     public function groupBy(...$columns) : Builder
     {
         foreach ($columns as $key => $column) {
-            if (is_string($column) || $column instanceof \Closure) {
+            if (\is_string($column) || $column instanceof \Closure) {
                 $this->groups[] = $column;
             } else {
                 throw new \InvalidArgumentException();
@@ -702,8 +702,8 @@ final class Builder extends BuilderAbstract
      */
     public function orderBy($columns, $order = 'DESC') : Builder
     {
-        if (is_string($columns) || $columns instanceof \Closure) {
-            if (!is_string($order)) {
+        if (\is_string($columns) || $columns instanceof \Closure) {
+            if (!\is_string($order)) {
                 throw new \InvalidArgumentException();
             }
 
@@ -712,9 +712,9 @@ final class Builder extends BuilderAbstract
             }
 
             $this->orders[$order][] = $columns;
-        } elseif (is_array($columns)) {
+        } elseif (\is_array($columns)) {
             foreach ($columns as $key => $column) {
-                $this->orders[is_string($order) ? $order : $order[$key]][] = $column;
+                $this->orders[\is_string($order) ? $order : $order[$key]][] = $column;
             }
         } else {
             throw new \InvalidArgumentException();
@@ -766,7 +766,7 @@ final class Builder extends BuilderAbstract
      */
     public function union($query) : Builder
     {
-        if (!is_array($query)) {
+        if (!\is_array($query)) {
             $this->unions[] = $query;
         } else {
             $this->unions += $query;
@@ -1022,7 +1022,7 @@ final class Builder extends BuilderAbstract
         $this->type = QueryType::UPDATE;
 
         foreach ($tables as $key => $table) {
-            if (is_string($table) || $table instanceof \Closure) {
+            if (\is_string($table) || $table instanceof \Closure) {
                 $this->updates[] = $table;
             } else {
                 throw new \InvalidArgumentException();
@@ -1216,7 +1216,7 @@ final class Builder extends BuilderAbstract
     {
         if (is_int($value)) {
             return \PDO::PARAM_INT;
-        } elseif (is_string($value) || is_float($value)) {
+        } elseif (\is_string($value) || is_float($value)) {
             return \PDO::PARAM_STR;
         }
 
@@ -1236,7 +1236,7 @@ final class Builder extends BuilderAbstract
      */
     public static function getPublicColumnName($column) : string
     {
-        if (is_string($column)) {
+        if (\is_string($column)) {
             return $column;
         } elseif ($column instanceof Column) {
             return $column->getPublicName();
diff --git a/DataStorage/Database/Query/Grammar/Grammar.php b/DataStorage/Database/Query/Grammar/Grammar.php
index e462a20de..ed8e1f3f7 100644
--- a/DataStorage/Database/Query/Grammar/Grammar.php
+++ b/DataStorage/Database/Query/Grammar/Grammar.php
@@ -281,7 +281,7 @@ class Grammar extends GrammarAbstract
         $expression = '';
 
         if (!$first) {
-            $expression = ' ' . strtoupper($element['boolean']) . ' ';
+            $expression = ' ' . \strtoupper($element['boolean']) . ' ';
         }
 
         if (is_string($element['column'])) {
@@ -297,9 +297,9 @@ class Grammar extends GrammarAbstract
         // todo: handle IN(...) as operator
 
         if (isset($element['value'])) {
-            $expression .= ' ' . strtoupper($element['operator']) . ' ' . $this->compileValue($query, $element['value'], $query->getPrefix());
+            $expression .= ' ' . \strtoupper($element['operator']) . ' ' . $this->compileValue($query, $element['value'], $query->getPrefix());
         } else {
-            $operator    = strtoupper($element['operator']) === '=' ? 'IS' : 'IS NOT';
+            $operator    = \strtoupper($element['operator']) === '=' ? 'IS' : 'IS NOT';
             $expression .= ' ' . $operator . ' ' . $this->compileValue($query, $element['value'], $query->getPrefix());
         }
 
@@ -342,7 +342,7 @@ class Grammar extends GrammarAbstract
                 $values .= $this->compileValue($query, $val, $prefix) . ', ';
             }
 
-            return '(' . rtrim($values, ', ') . ')';
+            return '(' . \rtrim($values, ', ') . ')';
         } elseif ($value instanceof \DateTime) {
             return $query->quote($value->format('Y-m-d H:i:s'));
         } elseif ($value === null) {
@@ -411,7 +411,7 @@ class Grammar extends GrammarAbstract
             $expression .= $this->compileSystem($group, $query->getPrefix()) . ', ';
         }
 
-        $expression = rtrim($expression, ', ');
+        $expression = \rtrim($expression, ', ');
 
         return 'GROUP BY ' . $expression;
     }
@@ -435,7 +435,7 @@ class Grammar extends GrammarAbstract
                 $expression .= $this->compileSystem($column, $query->getPrefix()) . ', ';
             }
 
-            $expression  = rtrim($expression, ', ');
+            $expression  = \rtrim($expression, ', ');
             $expression .= ' ' . $key . ', ';
         }
 
@@ -443,7 +443,7 @@ class Grammar extends GrammarAbstract
             return '';
         }
 
-        $expression = rtrim($expression, ', ');
+        $expression = \rtrim($expression, ', ');
 
         return 'ORDER BY ' . $expression;
     }
@@ -495,7 +495,7 @@ class Grammar extends GrammarAbstract
             return '';
         }
 
-        return '(' . rtrim($cols, ', ') . ')';
+        return '(' . \rtrim($cols, ', ') . ')';
     }
 
     /**
@@ -520,7 +520,7 @@ class Grammar extends GrammarAbstract
             return '';
         }
 
-        return 'VALUES ' . rtrim($vals, ', ');
+        return 'VALUES ' . \rtrim($vals, ', ');
     }
 
     /**
@@ -548,6 +548,6 @@ class Grammar extends GrammarAbstract
             return '';
         }
 
-        return 'SET ' . rtrim($vals, ', ');
+        return 'SET ' . \rtrim($vals, ', ');
     }
 }
diff --git a/Localization/Localization.php b/Localization/Localization.php
index 83fbc5382..9be968ddc 100644
--- a/Localization/Localization.php
+++ b/Localization/Localization.php
@@ -232,7 +232,7 @@ final class Localization
      */
     public function setLanguage(string $language) : void
     {
-        $language = strtolower($language);
+        $language = \strtolower($language);
 
         if (!ISO639x1Enum::isValidValue($language)) {
             throw new InvalidEnumValue($language);
diff --git a/Localization/Money.php b/Localization/Money.php
index d3534fc8e..ff658ce5c 100644
--- a/Localization/Money.php
+++ b/Localization/Money.php
@@ -115,9 +115,9 @@ final class Money implements \Serializable
             $right = $split[1];
         }
 
-        $right = substr($right, 0, self::MAX_DECIMALS);
+        $right = \substr($right, 0, self::MAX_DECIMALS);
 
-        return ((int) $left) * 10 ** self::MAX_DECIMALS + (int) str_pad($right, self::MAX_DECIMALS, '0');
+        return ((int) $left) * 10 ** self::MAX_DECIMALS + (int) \str_pad($right, self::MAX_DECIMALS, '0');
     }
 
     /**
@@ -185,10 +185,10 @@ final class Money implements \Serializable
     {
         $value = (string) round($this->value, -self::MAX_DECIMALS + $decimals);
 
-        $left  = substr($value, 0, -self::MAX_DECIMALS);
-        $right = substr($value, -self::MAX_DECIMALS);
+        $left  = \substr($value, 0, -self::MAX_DECIMALS);
+        $right = \substr($value, -self::MAX_DECIMALS);
 
-        return ($decimals > 0) ? number_format((float) $left, 0, $this->decimal, $this->thousands) . $this->decimal . substr($right, 0, $decimals) : (string) $left;
+        return ($decimals > 0) ? number_format((float) $left, 0, $this->decimal, $this->thousands) . $this->decimal . \substr($right, 0, $decimals) : (string) $left;
     }
 
     /**
@@ -292,7 +292,7 @@ final class Money implements \Serializable
      */
     public function abs() : Money
     {
-        $this->value = abs($this->value);
+        $this->value = \abs($this->value);
 
         return $this;
     }