diff --git a/src/item/Armor.php b/src/item/Armor.php
index 39ced43e3..cd3d6bd55 100644
--- a/src/item/Armor.php
+++ b/src/item/Armor.php
@@ -96,7 +96,7 @@ class Armor extends Durable{
 
 		foreach($this->getEnchantments() as $enchantment){
 			$type = $enchantment->getType();
-			if($type instanceof ProtectionEnchantment and $type->isApplicable($event)){
+			if($type instanceof ProtectionEnchantment && $type->isApplicable($event)){
 				$epf += $type->getProtectionFactor($enchantment->getLevel());
 			}
 		}
@@ -110,7 +110,7 @@ class Armor extends Durable{
 
 			$chance = 1 / ($unbreakingLevel + 1);
 			for($i = 0; $i < $amount; ++$i){
-				if(mt_rand(1, 100) > 60 and lcg_value() > $chance){ //unbreaking only applies to armor 40% of the time at best
+				if(mt_rand(1, 100) > 60 && lcg_value() > $chance){ //unbreaking only applies to armor 40% of the time at best
 					$negated++;
 				}
 			}
diff --git a/src/item/Bow.php b/src/item/Bow.php
index 41777e0a6..c74b91f4f 100644
--- a/src/item/Bow.php
+++ b/src/item/Bow.php
@@ -52,7 +52,7 @@ class Bow extends Tool implements Releasable{
 			default => null
 		};
 
-		if($player->hasFiniteResources() and $inventory === null){
+		if($player->hasFiniteResources() && $inventory === null){
 			return ItemUseResult::FAIL();
 		}
 
@@ -85,7 +85,7 @@ class Bow extends Tool implements Releasable{
 		}
 		$ev = new EntityShootBowEvent($player, $this, $entity, $baseForce * 3);
 
-		if($baseForce < 0.1 or $diff < 5 or $player->isSpectator()){
+		if($baseForce < 0.1 || $diff < 5 || $player->isSpectator()){
 			$ev->cancel();
 		}
 
diff --git a/src/item/Bucket.php b/src/item/Bucket.php
index b7fd2a19f..3d6c818a1 100644
--- a/src/item/Bucket.php
+++ b/src/item/Bucket.php
@@ -38,7 +38,7 @@ class Bucket extends Item{
 
 	public function onInteractBlock(Player $player, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector) : ItemUseResult{
 		//TODO: move this to generic placement logic
-		if($blockClicked instanceof Liquid and $blockClicked->isSource()){
+		if($blockClicked instanceof Liquid && $blockClicked->isSource()){
 			$stack = clone $this;
 			$stack->pop();
 
diff --git a/src/item/ChorusFruit.php b/src/item/ChorusFruit.php
index 7cf621e67..51364b15b 100644
--- a/src/item/ChorusFruit.php
+++ b/src/item/ChorusFruit.php
@@ -61,7 +61,7 @@ class ChorusFruit extends Food{
 			$y = mt_rand($minY, $maxY);
 			$z = mt_rand($minZ, $maxZ);
 
-			while($y >= 0 and !$world->getBlockAt($x, $y, $z)->isSolid()){
+			while($y >= 0 && !$world->getBlockAt($x, $y, $z)->isSolid()){
 				$y--;
 			}
 			if($y < 0){
@@ -70,7 +70,7 @@ class ChorusFruit extends Food{
 
 			$blockUp = $world->getBlockAt($x, $y + 1, $z);
 			$blockUp2 = $world->getBlockAt($x, $y + 2, $z);
-			if($blockUp->isSolid() or $blockUp instanceof Liquid or $blockUp2->isSolid() or $blockUp2 instanceof Liquid){
+			if($blockUp->isSolid() || $blockUp instanceof Liquid || $blockUp2->isSolid() || $blockUp2 instanceof Liquid){
 				continue;
 			}
 
diff --git a/src/item/Durable.php b/src/item/Durable.php
index 004525808..9d4a2d044 100644
--- a/src/item/Durable.php
+++ b/src/item/Durable.php
@@ -62,7 +62,7 @@ abstract class Durable extends Item{
 	 * @return bool if any damage was applied to the item
 	 */
 	public function applyDamage(int $amount) : bool{
-		if($this->isUnbreakable() or $this->isBroken()){
+		if($this->isUnbreakable() || $this->isBroken()){
 			return false;
 		}
 
@@ -81,7 +81,7 @@ abstract class Durable extends Item{
 	}
 
 	public function setDamage(int $damage) : Item{
-		if($damage < 0 or $damage > $this->getMaxDurability()){
+		if($damage < 0 || $damage > $this->getMaxDurability()){
 			throw new \InvalidArgumentException("Damage must be in range 0 - " . $this->getMaxDurability());
 		}
 		$this->damage = $damage;
diff --git a/src/item/Item.php b/src/item/Item.php
index a1a3b8c89..a1b2a6eab 100644
--- a/src/item/Item.php
+++ b/src/item/Item.php
@@ -277,7 +277,7 @@ class Item implements \JsonSerializable{
 		if($display !== null){
 			$this->customName = $display->getString(self::TAG_DISPLAY_NAME, $this->customName);
 			$lore = $display->getListTag(self::TAG_DISPLAY_LORE);
-			if($lore !== null and $lore->getTagType() === NBT::TAG_String){
+			if($lore !== null && $lore->getTagType() === NBT::TAG_String){
 				/** @var StringTag $t */
 				foreach($lore as $t){
 					$this->lore[] = $t->getValue();
@@ -287,7 +287,7 @@ class Item implements \JsonSerializable{
 
 		$this->removeEnchantments();
 		$enchantments = $tag->getListTag(self::TAG_ENCH);
-		if($enchantments !== null and $enchantments->getTagType() === NBT::TAG_Compound){
+		if($enchantments !== null && $enchantments->getTagType() === NBT::TAG_Compound){
 			/** @var CompoundTag $enchantment */
 			foreach($enchantments as $enchantment){
 				$magicNumber = $enchantment->getShort("id", -1);
@@ -412,7 +412,7 @@ class Item implements \JsonSerializable{
 	}
 
 	public function isNull() : bool{
-		return $this->count <= 0 or $this->getId() === ItemIds::AIR;
+		return $this->count <= 0 || $this->getId() === ItemIds::AIR;
 	}
 
 	/**
@@ -568,9 +568,9 @@ class Item implements \JsonSerializable{
 	 * @param bool $checkCompound Whether to verify that the items' NBT match.
 	 */
 	final public function equals(Item $item, bool $checkDamage = true, bool $checkCompound = true) : bool{
-		return $this->getId() === $item->getId() and
-			(!$checkDamage or $this->getMeta() === $item->getMeta()) and
-			(!$checkCompound or $this->getNamedTag()->equals($item->getNamedTag()));
+		return $this->getId() === $item->getId() &&
+			(!$checkDamage || $this->getMeta() === $item->getMeta()) &&
+			(!$checkCompound || $this->getNamedTag()->equals($item->getNamedTag()));
 	}
 
 	/**
@@ -584,7 +584,7 @@ class Item implements \JsonSerializable{
 	 * Returns whether the specified item stack has the same ID, damage, NBT and count as this item stack.
 	 */
 	final public function equalsExact(Item $other) : bool{
-		return $this->equals($other, true, true) and $this->count === $other->count;
+		return $this->equals($other, true, true) && $this->count === $other->count;
 	}
 
 	final public function __toString() : string{
@@ -676,7 +676,7 @@ class Item implements \JsonSerializable{
 	 * @throws SavedDataLoadingException
 	 */
 	public static function nbtDeserialize(CompoundTag $tag) : Item{
-		if($tag->getTag("id") === null or $tag->getTag("Count") === null){
+		if($tag->getTag("id") === null || $tag->getTag("Count") === null){
 			return ItemFactory::getInstance()->get(0);
 		}
 
diff --git a/src/item/ItemEnchantmentHandlingTrait.php b/src/item/ItemEnchantmentHandlingTrait.php
index 927509a41..9ba344139 100644
--- a/src/item/ItemEnchantmentHandlingTrait.php
+++ b/src/item/ItemEnchantmentHandlingTrait.php
@@ -42,7 +42,7 @@ trait ItemEnchantmentHandlingTrait{
 
 	public function hasEnchantment(Enchantment $enchantment, int $level = -1) : bool{
 		$id = spl_object_id($enchantment);
-		return isset($this->enchantments[$id]) and ($level === -1 or $this->enchantments[$id]->getLevel() === $level);
+		return isset($this->enchantments[$id]) && ($level === -1 || $this->enchantments[$id]->getLevel() === $level);
 	}
 
 	public function getEnchantment(Enchantment $enchantment) : ?EnchantmentInstance{
@@ -54,7 +54,7 @@ trait ItemEnchantmentHandlingTrait{
 	 */
 	public function removeEnchantment(Enchantment $enchantment, int $level = -1) : self{
 		$instance = $this->getEnchantment($enchantment);
-		if($instance !== null and ($level === -1 or $instance->getLevel() === $level)){
+		if($instance !== null && ($level === -1 || $instance->getLevel() === $level)){
 			unset($this->enchantments[spl_object_id($enchantment)]);
 		}
 
diff --git a/src/item/ItemFactory.php b/src/item/ItemFactory.php
index ae6a596fb..dbceea1b0 100644
--- a/src/item/ItemFactory.php
+++ b/src/item/ItemFactory.php
@@ -418,7 +418,7 @@ class ItemFactory{
 		$id = $item->getId();
 		$variant = $item->getMeta();
 
-		if(!$override and $this->isRegistered($id, $variant)){
+		if(!$override && $this->isRegistered($id, $variant)){
 			throw new \RuntimeException("Trying to overwrite an already registered item");
 		}
 
@@ -453,7 +453,7 @@ class ItemFactory{
 		if($meta !== -1){
 			if(isset($this->list[$offset = self::getListOffset($id, $meta)])){
 				$item = clone $this->list[$offset];
-			}elseif(isset($this->list[$zero = self::getListOffset($id, 0)]) and $this->list[$zero] instanceof Durable){
+			}elseif(isset($this->list[$zero = self::getListOffset($id, 0)]) && $this->list[$zero] instanceof Durable){
 				if($meta <= $this->list[$zero]->getMaxDurability()){
 					$item = clone $this->list[$zero];
 					$item->setDamage($meta);
@@ -498,7 +498,7 @@ class ItemFactory{
 	}
 
 	private static function getListOffset(int $id, int $variant) : int{
-		if($id < -0x8000 or $id > 0x7fff){
+		if($id < -0x8000 || $id > 0x7fff){
 			throw new \InvalidArgumentException("ID must be in range " . -0x8000 . " - " . 0x7fff);
 		}
 		return (($id & 0xffff) << 16) | ($variant & 0xffff);
diff --git a/src/item/ItemIdentifier.php b/src/item/ItemIdentifier.php
index 0242706f4..414cd5e0e 100644
--- a/src/item/ItemIdentifier.php
+++ b/src/item/ItemIdentifier.php
@@ -31,7 +31,7 @@ final class ItemIdentifier{
 	private $meta;
 
 	public function __construct(int $id, int $meta){
-		if($id < -0x8000 or $id > 0x7fff){ //signed short range
+		if($id < -0x8000 || $id > 0x7fff){ //signed short range
 			throw new \InvalidArgumentException("ID must be in range " . -0x8000 . " - " . 0x7fff);
 		}
 		$this->id = $id;
diff --git a/src/item/WrittenBook.php b/src/item/WrittenBook.php
index 88352cdd1..129dfec3b 100644
--- a/src/item/WrittenBook.php
+++ b/src/item/WrittenBook.php
@@ -65,7 +65,7 @@ class WrittenBook extends WritableBookBase{
 	 * @return $this
 	 */
 	public function setGeneration(int $generation) : self{
-		if($generation < 0 or $generation > 3){
+		if($generation < 0 || $generation > 3){
 			throw new \InvalidArgumentException("Generation \"$generation\" is out of range");
 		}
 
diff --git a/src/item/enchantment/ProtectionEnchantment.php b/src/item/enchantment/ProtectionEnchantment.php
index 30312ce34..b6f6a91be 100644
--- a/src/item/enchantment/ProtectionEnchantment.php
+++ b/src/item/enchantment/ProtectionEnchantment.php
@@ -66,6 +66,6 @@ class ProtectionEnchantment extends Enchantment{
 	 * Returns whether this enchantment type offers protection from the specified damage source's cause.
 	 */
 	public function isApplicable(EntityDamageEvent $event) : bool{
-		return $this->applicableDamageTypes === null or isset($this->applicableDamageTypes[$event->getCause()]);
+		return $this->applicableDamageTypes === null || isset($this->applicableDamageTypes[$event->getCause()]);
 	}
 }