diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 404967497..2f171ec73 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -1612,7 +1612,7 @@ class Level implements ChunkManager, Metadatable{
 
 			$block->position($pos);
 			$block->clearCaches();
-			unset($this->blockCache[Level::blockHash($pos->x, $pos->y, $pos->z)]);
+			unset($this->blockCache[$blockHash = Level::blockHash($pos->x, $pos->y, $pos->z)]);
 
 			$index = Level::chunkHash($pos->x >> 4, $pos->z >> 4);
 
@@ -1624,7 +1624,7 @@ class Level implements ChunkManager, Metadatable{
 					$this->changedBlocks[$index] = [];
 				}
 
-				$this->changedBlocks[$index][Level::blockHash($block->x, $block->y, $block->z)] = clone $block;
+				$this->changedBlocks[$index][$blockHash] = clone $block;
 			}
 
 			foreach($this->getChunkLoaders($pos->x >> 4, $pos->z >> 4) as $loader){
@@ -2146,13 +2146,13 @@ class Level implements ChunkManager, Metadatable{
 	 * @param int $id 0-255
 	 */
 	public function setBlockIdAt(int $x, int $y, int $z, int $id){
-		unset($this->blockCache[Level::blockHash($x, $y, $z)]);
+		unset($this->blockCache[$blockHash = Level::blockHash($x, $y, $z)]);
 		$this->getChunk($x >> 4, $z >> 4, true)->setBlockId($x & 0x0f, $y, $z & 0x0f, $id & 0xff);
 
 		if(!isset($this->changedBlocks[$index = Level::chunkHash($x >> 4, $z >> 4)])){
 			$this->changedBlocks[$index] = [];
 		}
-		$this->changedBlocks[$index][Level::blockHash($x, $y, $z)] = $v = new Vector3($x, $y, $z);
+		$this->changedBlocks[$index][$blockHash] = $v = new Vector3($x, $y, $z);
 		foreach($this->getChunkLoaders($x >> 4, $z >> 4) as $loader){
 			$loader->onBlockChanged($v);
 		}
@@ -2208,13 +2208,13 @@ class Level implements ChunkManager, Metadatable{
 	 * @param int $data 0-15
 	 */
 	public function setBlockDataAt(int $x, int $y, int $z, int $data){
-		unset($this->blockCache[Level::blockHash($x, $y, $z)]);
+		unset($this->blockCache[$blockHash = Level::blockHash($x, $y, $z)]);
 		$this->getChunk($x >> 4, $z >> 4, true)->setBlockData($x & 0x0f, $y, $z & 0x0f, $data & 0x0f);
 
 		if(!isset($this->changedBlocks[$index = Level::chunkHash($x >> 4, $z >> 4)])){
 			$this->changedBlocks[$index] = [];
 		}
-		$this->changedBlocks[$index][Level::blockHash($x, $y, $z)] = $v = new Vector3($x, $y, $z);
+		$this->changedBlocks[$index][$blockHash] = $v = new Vector3($x, $y, $z);
 		foreach($this->getChunkLoaders($x >> 4, $z >> 4) as $loader){
 			$loader->onBlockChanged($v);
 		}