Tic-Tac-Toe-Tomek

execute.log

$ cat test.txt |php -f index.php
Case #1: X won
Case #2: Draw
Case #3: Game has not completed
Case #4: O won
Case #5: O won
Case #6: O won

solver.php

<?php
$raw    = trim(file_get_contents('php://stdin'));
$temp   = explode("\n", $raw, 2);
$numberOfBlocks = $temp[0];
if ($numberOfBlocks == 0) {
    exit;
}
$rawBlocks = explode("\n\n", $temp[1]);
foreach ($rawBlocks as $i => $rawBlock) {
    switch (selectWinner($rawBlock)) {
        case -1:
            echo "Case #".($i+1).": Game has not completed\n";
            break;
        case 0:
            echo "Case #".($i+1).": Draw\n";
            break;
        case 1:
            echo "Case #".($i+1).": X won\n";
            break;
        case 2:
            echo "Case #".($i+1).": O won\n";
            break;
    }
}

function parseBlock($rawBlock) {
    $block = array();
    $rawRows = explode("\n", $rawBlock);
    foreach ($rawRows as $i => $rawRow) {
        foreach (str_split($rawRow) as $j => $field) {
            $block[$i.$j] = $field;
        }
    }
    return $block;
}

function selectWinner($rawBlock) {
    $hasDot = strpos($rawBlock, '.');
    $block = parseBlock($rawBlock);
    static $winningLines = array(
        array('00', '01', '02', '03'),
        array('10', '11', '12', '13'),
        array('20', '21', '22', '23'),
        array('30', '31', '32', '33'),
        array('00', '10', '20', '30'),
        array('01', '11', '21', '31'),
        array('02', '12', '22', '32'),
        array('03', '13', '23', '33'),
        array('00', '11', '22', '33'),
        array('03', '12', '21', '30'),
    );
    foreach($winningLines as $winningLine){
        $countX = 0;
        $countO = 0;
        foreach($winningLine as $field) {
            switch ($block[$field]) {
                case 'T':
                    $countX++;
                    $countO++;
                    break;
                case 'X':
                    $countX++;
                    break;
                case 'O':
                    $countO++;
                    break;
            }
        }
        if ($countX == 4) {
            return 1;
        }
        elseif ($countO == 4) {
            return 2;
        }
    }
    if ($hasDot) {
        return -1;
    }
    return 0;
}

test.txt

6
XXXT
....
OO..
....

XOXT
XXOO
OXOX
XXOO

XOX.
OX..
....
....

OOXX
OXXX
OX.T
O..O

XXXO
..O.
.O..
T...

OXXX
XO..
..O.
...O