League Table PHP Challenge

league-table.php

<?php

class LeagueTable
{
    public function __construct(array $players)
    {
        $this->standings = [];
        foreach($players as $index => $p) {
            $this->standings[$p] = [
                'index'        => $index,
                'games_played' => 0,
                'score'        => 0
            ];
        }
    }

    public function recordResult(string $player, int $score) : void
    {
        $this->standings[$player]['games_played']++;
        $this->standings[$player]['score'] += $score;
    }

    public function playerRank(int $rank) : string
    {
        $rankings = $this->standings;
        
        // Uasort allows us to move elements up or down the array in
        // comparison to their subsequent elements and maintain
        // their string keys, which are the player names.
        uasort($rankings, function ($a, $b) {
            // Scores are unequal, use score to order.
            // $b will be moved up in the array.
            if ($a['score'] < $b['score']) {
                return 1;
            }
            
            // $b will be moved down the array.
            if ($a['score'] > $b['score']) {
                return -1;
            }
            
            // Scores are equal. Use games played to order.
            // $b will be moved up the array.
            if ($a['games_played'] > $b['games_played']) {
                return 1;
            }
            
            // $b will be moved down the array.
            if ($a['games_played'] < $b['games_played']) {
                return -1;
            }
            
            // Score and Games played are equal. Use index to order.
            // Move $b up the array if $a has a greater index.
            // Otherwise move $b down.
            return $a['index'] > $b['index'] ? 1 : -1;
        });
        
        // Since the rankings are now in order, we can get
        // the names of the players in their ranked order
        // -- which will be the array entry's index.
        $ranks = array_keys($rankings);
        
        // Ranks start at '1', so we'll subtract 1 before retrieving
        // the player rank from the ordered, indexed names.
        return $ranks[--$rank];
    }
}

$table = new LeagueTable(array('Mike', 'Chris', 'Arnold'));
$table->recordResult('Mike', 2);
$table->recordResult('Mike', 3);
$table->recordResult('Arnold', 5);
$table->recordResult('Chris', 5);

// Displays "Chris".
echo $table->playerRank(1);