Crash with /f leader name

So i'm trying to fix it but nothing works

Error: http://pastebin.com/PmF71vrL

Crashdump: http://pastebin.com/QExjQ2dj

Code:

PHP:

                    if($args[0] == "leader") {
                        if(!isset($args[1])) {
                            $sender->sendMessage($this->plugin->formatMessage("Usage: /f leader <player>"));
                            return true;
                        }
                        if(!$this->plugin->isInFaction($sender->getName())) {
                            $sender->sendMessage($this->plugin->formatMessage("You must be in a faction to use this!"));
                        }
                        if(!$this->plugin->isLeader($player)) {
                            $sender->sendMessage($this->plugin->formatMessage("You must be leader to use this"));
                        }
                        if($this->plugin->getPlayerFaction($player) != $this->plugin->getPlayerFaction($args[1])) {
                            $sender->sendMessage($this->plugin->formatMessage("Add player to faction first!"));
                        }      
                        if(!$this->plugin->getServer()->getPlayerExact($args[1])->isOnline()) {
                            $sender->sendMessage($this->plugin->formatMessage("Player not online!"));
                        }
                            $factionName = $this->plugin->getPlayerFaction($player);
                            $factionName = $this->plugin->getPlayerFaction($player);
  
                            $stmt = $this->plugin->db->prepare("INSERT OR REPLACE INTO master (player, faction, rank) VALUES (:player, :faction, :rank);");
                            $stmt->bindValue(":player", $player);
                            $stmt->bindValue(":faction", $factionName);
                            $stmt->bindValue(":rank", "Member");
                            $result = $stmt->execute();
  
                            $stmt = $this->plugin->db->prepare("INSERT OR REPLACE INTO master (player, faction, rank) VALUES (:player, :faction, :rank);");
                            $stmt->bindValue(":player", strtolower($args[1]));
                            $stmt->bindValue(":faction", $factionName);
                            $stmt->bindValue(":rank", "Leader");
                            $result = $stmt->execute();
  
  
                            $sender->sendMessage($this->plugin->formatMessage("You are no longer leader!", true));
                            $this->plugin->getServer()->getPlayer($args[1])->sendMessage($this->plugin->formatMessage("You are now leader \nof $factionName!",  true));
                            $this->plugin->updateTag($sender->getName());
                            $this->plugin->updateTag($this->plugin->getServer()->getPlayer($args[1])->getName());
                        }
                  


So how can this be fixed?

PHP:

 if($args[0] == "leader") {
                        if(!isset($args[1])) {
                            $sender->sendMessage($this->plugin->formatMessage("Usage: /f leader <player>"));
                            return true;
                        }
                        if(!$this->plugin->isInFaction($sender->getName())) {
                            $sender->sendMessage($this->plugin->formatMessage("You must be in a faction to use this!"));
                        }
                        if(!$this->plugin->isLeader($player)) {
                            $sender->sendMessage($this->plugin->formatMessage("You must be leader to use this"));
                        }
                        if($this->plugin->getPlayerFaction($player) != $this->plugin->getPlayerFaction($args[1])) {
                            $sender->sendMessage($this->plugin->formatMessage("Add player to faction first!"));
                        }    
                        $p = $args[1];
                        if($p != $this->plugin->getServer()->getPlayerExact($args[1])) {
                            $sender->sendMessage($this->plugin->formatMessage("Player not online!"));
                        }
                            $factionName = $this->plugin->getPlayerFaction($player);
                            $factionName = $this->plugin->getPlayerFaction($player);

                            $stmt = $this->plugin->db->prepare("INSERT OR REPLACE INTO master (player, faction, rank) VALUES (:player, :faction, :rank);");
                            $stmt->bindValue(":player", $player);
                            $stmt->bindValue(":faction", $factionName);
                            $stmt->bindValue(":rank", "Member");
                            $result = $stmt->execute();

                            $stmt = $this->plugin->db->prepare("INSERT OR REPLACE INTO master (player, faction, rank) VALUES (:player, :faction, :rank);");
                            $stmt->bindValue(":player", strtolower($args[1]));
                            $stmt->bindValue(":faction", $factionName);
                            $stmt->bindValue(":rank", "Leader");
                            $result = $stmt->execute();


                            $sender->sendMessage($this->plugin->formatMessage("You are no longer leader!", true));
                            $this->plugin->getServer()->getPlayer($args[1])->sendMessage($this->plugin->formatMessage("You are now leader \nof $factionName!",  true));
                            $this->plugin->updateTag($sender->getName());
                            $this->plugin->updateTag($this->plugin->getServer()->getPlayer($args[1])->getName());
                        }