comprobardiagonal

$i = $fila;
$j = $col;
$vermell = 0;
$groc = 0;

while ($i - 1 >= 0 && $j - 1 >= 0) {
  $i--;
  $j--;
}

while (
  $vermell < 4 && $groc < 4 &&
  $i <= count($_SESSION["tauler"]) - 1 && $j <= count($_SESSION["tauler"][0]) - 1
) {

  if ($_SESSION["tauler"][$i][$j] == 1) {
    $vermell++;
    $groc = 0;
  } elseif ($_SESSION["tauler"][$i][$j] == 2) {
    $groc++;
    $vermell = 0;
  }

  $i++;
  $j++;
}


if ($vermell == 4 || $groc == 4) {

  return true;
} else {



  $i = $fila;
  $j = $col;
  $vermell = 0;
  $groc = 0;

  while ($i - 1 >= 0  && $j + 1 <= count($_SESSION["tauler"][0]) - 1) {
    $i--;
    $j++;
  }


  while (
    $vermell < 4 && $groc < 4 &&
    $i <= count($_SESSION["tauler"]) - 1  && $j >= 0
  ) {

    if ($_SESSION["tauler"][$i][$j] == 1) {
      $vermell++;
      $groc = 0;
    } elseif ($_SESSION["tauler"][$i][$j] == 2) {
      $groc++;
      $vermell = 0;
    }

    $i++;
    $j--;
  }


  if ($vermell == 4 || $groc == 4) {
    echo "ganaste";
    return true;
  } else {

    return false;
  }
}