Chess

<?php
//$str = " - - - - - - - / - - - - - - - / - - - - - - - / - - - - - - - / - - - - - - - / - - - - - - - / - - - - - - - / - - - - - - - ";
$str = $_GET['board'];
$map = array(
    "Bishop" => 0,
    "Horseman" => 0,
    "King" => 0,
    "Pawn" => 0,
    "Queen" => 0,
    "Rook" => 0
);

$items = explode('/', $str);
if(count($items) != 8) {
    echo "<h1>Invalid chess board</h1>";
    die;
}
$result = '<table>';

for($i = 0; $i < count($items) ;$i++) {
    $result .= '<tr>';
    $currLine = explode('-', $items[$i]);
    if(count($currLine) != 8) {
        echo "<h1>Invalid chess board</h1>";
        die;
    }
    for($j = 0; $j < count($currLine) ;$j++) {
        if($currLine[$j] == ' ') {
            $result .= '<td> </td>';
        }
        else {
            $figure = $currLine[$j];
            $result .= '<td>' . $figure . '</td>';

            if($figure == 'B') {
                $map['Bishop']++;
            }
            else if($figure == 'H') {
                $map['Horseman']++;
            }
            else if($figure == 'K') {
                $map['King']++;
            }
            else if($figure == 'P') {
                $map['Pawn']++;
            }
            else if($figure == 'Q') {
                $map['Queen']++;
            }
            else if($figure == 'R') {
                $map['Rook']++;
            }
             else {
                echo "<h1>Invalid chess board</h1>";
                die;
            }
        }
    }
    $result .= '</tr>';
}
$result .= '</table>';


echo $result;
$map = array_filter($map, function ($var) {
    if($var == 0) {
        return false;
    }
    return true;
});
if(count($map) > 0) {
    echo json_encode($map);
}
?>