Fixed XP orbs trying to track players after teleport

closes #2028

@mal0ne-23, you are today's MVP.

src/pocketmine/command/defaults/TimingsCommand.php

@@ -126,7 +126,7 @@ class TimingsCommand extends VanillaCommand{
 						}
 						list(, $headers) = $result;
 						foreach($headers as $headerGroup){
-							if(isset($headerGroup["location"]) and preg_match('#^http://paste\\.ubuntu\\.com/([0-9]{1,})/#', trim($headerGroup["location"]), $match)){
+							if(isset($headerGroup["location"]) and preg_match('#^http://paste\\.ubuntu\\.com/([A-Za-z0-9+\/=]+)/#', trim($headerGroup["location"]), $match)){
 								$pasteId = $match[1];
 								break;
 							}
@@ -134,7 +134,7 @@ class TimingsCommand extends VanillaCommand{
 						if(isset($pasteId)){
 							$sender->sendMessage(new TranslationContainer("pocketmine.command.timings.timingsUpload", ["http://paste.ubuntu.com/" . $pasteId . "/"]));
 							$sender->sendMessage(new TranslationContainer("pocketmine.command.timings.timingsRead",
-								["http://" . $sender->getServer()->getProperty("timings.host", "timings.pmmp.io") . "/?url=$pasteId"]));
+								["http://" . $sender->getServer()->getProperty("timings.host", "timings.pmmp.io") . "/?url=" . urlencode($pasteId)]));
 						}else{
 							$sender->sendMessage(new TranslationContainer("pocketmine.command.timings.pasteError"));
 						}

src/pocketmine/entity/object/ExperienceOrb.php

@@ -165,16 +165,16 @@ class ExperienceOrb extends Entity{
 		}
 
 		$currentTarget = $this->getTargetPlayer();
+		if($currentTarget !== null and $currentTarget->distanceSquared($this) > self::MAX_TARGET_DISTANCE ** 2){
+			$currentTarget = null;
+		}
 
 		if($this->lookForTargetTime >= 20){
-			if($currentTarget === null or $currentTarget->distanceSquared($this) > self::MAX_TARGET_DISTANCE ** 2){
-				$this->setTargetPlayer(null);
-
+			if($currentTarget === null){
 				$newTarget = $this->level->getNearestEntity($this, self::MAX_TARGET_DISTANCE, Human::class);
 
 				if($newTarget instanceof Human and !($newTarget instanceof Player and $newTarget->isSpectator())){
 					$currentTarget = $newTarget;
-					$this->setTargetPlayer($currentTarget);
 				}
 			}
 
@@ -183,6 +183,8 @@ class ExperienceOrb extends Entity{
 			$this->lookForTargetTime += $tickDiff;
 		}
 
+		$this->setTargetPlayer($currentTarget);
+
 		if($currentTarget !== null){
 			$vector = $currentTarget->subtract($this)->add(0, $currentTarget->getEyeHeight() / 2, 0)->divide(self::MAX_TARGET_DISTANCE);
 

src/pocketmine/level/Level.php

@@ -823,8 +823,10 @@ class Level implements ChunkManager, Metadatable{
 			$this->checkSleep();
 		}
 
-		$this->server->batchPackets($this->players, $this->globalPackets);
-		$this->globalPackets = [];
+		if(!empty($this->players) and !empty($this->globalPackets)){
+			$this->server->batchPackets($this->players, $this->globalPackets);
+			$this->globalPackets = [];
+		}
 
 		foreach($this->chunkPackets as $index => $entries){
 			Level::getXZ($index, $chunkX, $chunkZ);