Php trouble creating object and accessing its attributes

Question

I have created a game class which represents a poker game. Im trying to read it in from a db and display one of the attribute e.g NoOfPlayers but i cannot get it working. Here is the class.

class pokerGame {

public $GameID, $State, $BuyIn, $Ante, $NoOfPlayers; 

function __construct() {
    $GameID = $BuyIn = $Players = $Ante = 0; 
    $State = ""; 
}

function withID($newGameID) {
    $this->read($newGameID);    
}

function read($newGameID)
{
    global $conn;

    $query = "SELECT * FROM games WHERE GameID = ".$newGameID." LIMIT 1";   
    $result = $conn->query($query) or die('Error getting values: '.$query); 

    $response = array();

    if ($result->num_rows == 0) { return;}

    $row = $result->fetch_assoc();

    $GameID = $row["GameID"];
    $State = $row["State"];
    $BuyIn = $row["BuyIn"];
    $Ante = $row["Ante"];
    $NoOfPlayers = $row["NoOfPlayers"];
}

function write($buyIn,$ante)
{
    global $conn;

    $query = "INSERT INTO games (BuyIn,Ante) VALUES ('$buyIn','$ante')";    

    $conn->query($query) or die('Error Inserting Values: '.$query); 

}

function getNoOfPlayers() {
     return $this->NoOfPlayers;
 }

}

and here is how im trying to access it.

  $thisPokergame = new pokerGame();
  $thisPokergame = $thisPokergame->withID("3");

  echo $thisPokergame->getNoOfPlayers();

Pretty sure my error is in the class as my object is NULL, i tried viewing the attributes using the get_object_vars method.

Uncaught Error: Call to a member function getNoOfPlayers() on null. — stephen reilly
– stephen reilly, Commented Apr 13, 2016 at 23:27
Your read function doesn't return an object, it returns nothing at all, why would you overwrite your actual object with the return of it? Just change your second line to $thisPokergame->withID("3"); — Jon
– Jon, Commented Apr 13, 2016 at 23:31
You should not be using global in a class method. Pass the connection to the constructor and keep it as a class property, then reference it as $this->conn — RiggsFolly
– RiggsFolly, Commented Apr 14, 2016 at 0:14

Searay330 · Accepted Answer · 2016-04-13 23:42:59Z

1

your not accessing member variables properly so your noOfPlayers is never being set. change

$NoOfPlayers = $row["NoOfPlayers"];

to this.

 $this->NoOfPlayers = $row["NoOfPlayers"];

and do that for all of your member variable calls

answered Apr 13, 2016 at 23:42

Searay330

1438 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Php trouble creating object and accessing its attributes

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related