PHP Notice: Undefined index errors

Question

I have been creating some code in PHP and the logs of my server keep showing the following errors. The code are handlers for a game that I have been creating. I have tried to fix them by researching and applying the ''fixes'' but it didn't go well.

Undefined index: a#jt in /usr/share/nginx/Sweater/Sweater/GameHandler.php on line 160 Undefined index: a#jt in /usr/share/nginx/Sweater/Sweater/GameHandler.php on line 161 Undefined index: a#jt in /usr/share/nginx/Sweater/Sweater/GameHandler.php on line 167 Undefined index: a#lt in /usr/share/nginx/Sweater/Sweater/GameHandler.php on line 227

Trying to get property of non-object in /usr/share/nginx/Sweater/Sweater/GameHandler.php on line 302

This is the code for them:

function handleJoinTable(Array $arrData, Client $objClient) {
    $intPlayer = $arrData[4];
    $tableId = $arrData[2];
    $strUsername = $this->objDatabase->getUsername($intPlayer);
    $seatId = count($this->tablePopulationById[$tableId]) - 1; // Line 160
    if($this->gamesByTableId[$tableId] === null) { // Line 161
        $findFourGame = new FindFour();
        $this->gamesByTableId[$tableId] = $findFourGame;
    }
    $this->tablePopulationById[$tableId][$strUsername]; // Line 167
    $seatId += 1;
    $objClient->sendXt('jt', $objClient->getIntRoom(), $tableId, $seatId);
    $objClient->sendXt('ut', $objClient->getIntRoom(), $tableId, $seatId);
    $this->playersByTableId[$tableId][] = $intPlayer;
    $this->tableId = $tableId;
}


function handleLeaveTable(Array $arrData, Client $objClient) {
        $intPlayer = $arrData[2];
        $tableId = $arrData[3];
        $strUsername = $this->arrClientsByID[$intPlayer]; // Line 227
        unset($objClient->arrPlayer[$intPlayer]);
        $objClient->sendXt('lt', $objClient->getIntRoom(), $strUsername);
    }

function handleGetGame(Array $arrData, Client $objClient) {
    $intPlayer = $arrData[3];
    if($objClient->getExtRoom() == 802) {
        $puckData = $this->rinkPuck;
        $objClient->sendXt('gz', $objClient->getIntRoom(), $puckData);
    } elseif($intPlayer->tableId !== null) { // Line 302
        $tableId = $intPlayer->tableId;
        $playerUsernames = array_keys($this->tablePopulationById[$tableId]);
        @list($firstPlayer, $secondPlayer) = $playerUsernames;
        $boardString = $this->gamesByTableId[$tableId]->convertToString();
        $objClient->sendXt('gz', -1, $firstPlayer, $secondPlayer, $boardString);
    }
}

What's going on here?

Please tell us specifically what the lines of code say. Some array key is missing that it's talking about, and the other error is you have no instance of a class, so cant access any of the properties! — delboy1978uk, Aug 24 '17 at 15:08
Look at [`isset`](http://php.net/manual/en/function.isset.php). Your checks seem flawed (161). Check that `tableId` is what you think it is. — ficuscr, Aug 24 '17 at 15:10

score 0 · Accepted Answer · answered Aug 24 '17 at 15:13

$this->tablePopulationById[$tableId]

tablePopulationById is an array that DOES NOT contain a key of index $tableId.

$arrData[3]; DOES NOT contain an object of whatever class you were expecting!

In both cases, var_dump them to see what you DO have!

var_dump($this->tablePopulationById);
var_dump($arrData);

PHP Notice: Undefined index errors

1 Answers1