"Call to a member function getLevel() on null"

I'm working on a plugin, and I wanted to compare a level(world) with another one matching from config file, Now there is a player I have whose world/level I want to compare but whenever I try that I get this error and I also have the same problem with checking for permissions, I really dont know why this occurs and this is making me crazy I'm tired of looking for a solution.
Here is my code, there is a ! at the end of the lines with the error of this null thingy.

Code:

$perm = $this->plugin->getServer()->getPlayer($player)->hasPermission("beaconsplus.effect"); !
if($perm == false)
{
      continue;
}
if($this->plugin->getServer()->getLevelByName($beaconLevel) == $this->plugin->getServer()->getPlayer($player)->getLevel()) !
 {

Please help me, I'm new to php though.

 

What is $player? getPlayer($player) is returning null instead of a Player object, which means getLevel was being called on null, thus the error.

 

this is the code before that

Code:

foreach($this->plugin->getServer()->getOnlinePlayers() as $player)
                     {
                         /*$perm = $this->plugin->getServer()->getPlayer($player)->hasPermission("beaconsplus.effect");
                         if($perm == false) 
                         {
                             continue;
                         }*/
                         if($this->plugin->getServer()->getLevelByName($beaconLevel) == $this->plugin->getServer()->getPlayer($player)->getLevel())
                         {
                              if($this->plugin->getServer()->getPlayer($player)->distance($beaconPos) <= $this->plugin->getConfig()->get("beacon-range"))
                              {

what do u think is wrong with $player? is it suppoed to return the player

 

Why do you get the player of a player
$server->getOnlinePlayers() already returns an array of players, not an array of player names.

 

After you foreach the online players, you don't need to use Server->getPlayer, because you already have the Player object to use.

 

damn.. I completely missed that out, I thought that returned a player name xD my bad.

 

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