Sortovanie poľa

<?php

$data = array (
    23 =>
        array (
            'matchesWon' => 6,
            'matchesLost' => 10,
            'totalPlays' => 16,
            'pointsScored' => 154,
            'pointsConceded' => 127,
            'homeWon' => 4,
            'homeLost' => 4,
            'awayWon' => 2,
            'awayLost' => 6,
            'touchB' => 0,
            'touchA' => 0,
        ),
    27 =>
        array (
            'matchesWon' => 11,
            'matchesLost' => 6,
            'totalPlays' => 17,
            'pointsScored' => 286,
            'pointsConceded' => 134,
            'homeWon' => 5,
            'homeLost' => 3,
            'awayWon' => 6,
            'awayLost' => 3,
            'touchA' => 0,
            'touchB' => 0,
        )
);

uasort($data, function($a, $b) {return $b['pointsScored'] - $a['pointsScored'];});

var_dump($data);

<?php

$teamMatches = array(2 => 2, 4 => 4, 1 => 1);

function cmp($a, $b) {
    if ($a == $b) {
        return 0;
    }
    return ($a < $b) ? -1 : 1;
}
uasort($teamMatches, 'cmp');
var_dump($teamMatches);exit;

function cmp($a, $b) {
  # $a obsahuje, $b obsahuje -> výsledek
  # 100, 200 -> vrátí kladné číslo (prohodit)
  # 200, 100 -> vrátí záporné číslo (správné pořádí)
  # 100, 100 -> vrátí nulu (prvky jsou shodné / nezáleží na pořadí)
  return $b['pointsScored'] - $a['pointsScored'];
}

function cmp($a, $b) {
    if ($a['pointsScored'] == $b['pointsScored']) {
        return 0;
    }
    
    # všimni si prohozených znamének - chceš řadit sestupně
    return ($a['pointsScored'] < $b['pointsScored']) ? 1 : -1;
}

<?php

class Test {
    protected function prot() {
        $teamMatches = array(2 => 2, 4 => 4, 1 => 1);

        function cmp($a, $b) {
            if ($a == $b) {
                return 0;
            }
            return ($a < $b) ? -1 : 1;
        }
        uasort($teamMatches, 'cmp');
        var_dump($teamMatches);exit;
    }

    public function call() {
        $this->prot();
    }
}

$t = new Test();
$t->call();

<?php

class Test {
    function cmp($a, $b) {
        if ($a == $b) {
            return 0;
        }
        return ($a < $b) ? -1 : 1;
    }

    protected function prot() {
        $teamMatches = array(2 => 2, 4 => 4, 1 => 1);

        uasort($teamMatches, 'cmp');
        var_dump($teamMatches);exit;
    }

    public function call() {
        $this->prot();
    }
}

$t = new Test();
$t->call();

uasort($teamMatches, array($this, 'cmp'));

protected function getConferences($parameters)
    {
        $teamMatches = $this->getTeamStats($parameters);
 
        uasort($teamMatches, function($a, $b) {return $b['pointsScored'] - $a['pointsScored'];});
        var_dump($teamMatches);
    exit;
}

return ($b['matchesWon'] * $a['totalPlays']) - ($a['matchesWon'] * $b['totalPlays']);

team1: totalplays - 19 z toho 13 víťazných = 0,684 ALE 13*17=221
team2: totalplays - 17 z toho 14 víťazných = 0,824 ALE 14*19=266 

$diff = ...; # nějaký výpočet s desetinnými čísly.
return $diff == 0 ? 0 : ($diff > 0 ? 1 : -1);