diff --git a/src/block/Rail.php b/src/block/Rail.php
index 219faf632..c906470ca 100644
--- a/src/block/Rail.php
+++ b/src/block/Rail.php
@@ -61,18 +61,15 @@ class Rail extends BaseRail{
 	}
 
 	protected function getPossibleConnectionDirectionsOneConstraint(int $constraint) : array{
-		/** @var int[] $horizontal */
-		static $horizontal = [
-			Facing::NORTH,
-			Facing::SOUTH,
-			Facing::WEST,
-			Facing::EAST
-		];
-
 		$possible = parent::getPossibleConnectionDirectionsOneConstraint($constraint);
 
 		if(($constraint & self::FLAG_ASCEND) === 0){
-			foreach($horizontal as $d){
+			foreach([
+				Facing::NORTH,
+				Facing::SOUTH,
+				Facing::WEST,
+				Facing::EAST
+			] as $d){
 				if($constraint !== $d){
 					$possible[$d] = true;
 				}
diff --git a/src/block/Torch.php b/src/block/Torch.php
index 001fbba6f..570c11aa6 100644
--- a/src/block/Torch.php
+++ b/src/block/Torch.php
@@ -72,14 +72,13 @@ class Torch extends Flowable{
 			$this->facing = $face;
 			return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
 		}else{
-			static $faces = [
+			foreach([
 				Facing::SOUTH,
 				Facing::WEST,
 				Facing::NORTH,
 				Facing::EAST,
 				Facing::DOWN
-			];
-			foreach($faces as $side){
+			] as $side){
 				$block = $this->getSide($side);
 				if(!$block->isTransparent()){
 					$this->facing = Facing::opposite($side);
diff --git a/src/utils/EnumTrait.php b/src/utils/EnumTrait.php
index 8eb2a1075..713698006 100644
--- a/src/utils/EnumTrait.php
+++ b/src/utils/EnumTrait.php
@@ -82,8 +82,7 @@ trait EnumTrait{
 	 * @throws \InvalidArgumentException
 	 */
 	private function __construct(string $enumName){
-		static $pattern = '/^\D[A-Za-z\d_]+$/u';
-		if(preg_match($pattern, $enumName, $matches) === 0){
+		if(preg_match('/^\D[A-Za-z\d_]+$/u', $enumName, $matches) === 0){
 			throw new \InvalidArgumentException("Invalid enum member name \"$enumName\", should only contain letters, numbers and underscores, and must not start with a number");
 		}
 		$this->enumName = $enumName;