eliminate remaining empty() usages

src/entity/Entity.php

@@ -644,7 +644,7 @@ abstract class Entity{
 		$this->justCreated = false;
 
 		$changedProperties = $this->getSyncedNetworkData(true);
-		if(!empty($changedProperties)){
+		if(count($changedProperties) > 0){
 			$this->sendData($this->hasSpawned, $changedProperties);
 			$this->networkProperties->clearDirtyProperties();
 		}

src/entity/ExperienceManager.php

@@ -31,6 +31,7 @@ use pocketmine\world\sound\XpCollectSound;
 use pocketmine\world\sound\XpLevelUpSound;
 use function array_rand;
 use function ceil;
+use function count;
 use function max;
 use function min;
 
@@ -251,7 +252,7 @@ class ExperienceManager{
 			}
 		}
 
-		if(!empty($equipment)){
+		if(count($equipment) > 0){
 			$repairItem = $equipment[$k = array_rand($equipment)];
 			if($repairItem->getDamage() > 0){
 				$repairAmount = min($repairItem->getDamage(), $xpValue * 2);

src/entity/Living.php

@@ -186,7 +186,7 @@ abstract class Living extends Entity{
 
 		$nbt->setShort("Air", $this->getAirSupplyTicks());
 
-		if(!empty($this->effectManager->all())){
+		if(count($this->effectManager->all()) > 0){
 			$effects = [];
 			foreach($this->effectManager->all() as $effect){
 				$effects[] = CompoundTag::create()

src/entity/effect/EffectManager.php

@@ -29,6 +29,7 @@ use pocketmine\event\entity\EntityEffectRemoveEvent;
 use pocketmine\utils\Color;
 use pocketmine\utils\Utils;
 use function abs;
+use function count;
 use function spl_object_id;
 
 class EffectManager{
@@ -188,7 +189,7 @@ class EffectManager{
 			}
 		}
 
-		if(!empty($colors)){
+		if(count($colors) > 0){
 			$this->bubbleColor = Color::mix(...$colors);
 			$this->onlyAmbientEffects = $ambient;
 		}else{
@@ -217,7 +218,7 @@ class EffectManager{
 			}
 		}
 
-		return !empty($this->effects);
+		return count($this->effects) > 0;
 	}
 
 	/**