Рефакторинг 2 циклов while для завершения

У меня есть раздел php-кода, который я написал для того, чтобы создать список случайных матчей для 16 клубов, которые играют по 30 игр в течение сезона. У меня проблема в том, что код никогда не завершается. Если я уменьшу количество недель; $ w, он начинает иногда завершить около 15, любой выше 20, и это никогда не завершается. Можно ли как-то реорганизовать этот код, чтобы он в конце концов завершился?

set_time_limit(0);
ini_set('max_execution_time', 0);
ini_set('memory_limit','960M');

$fixtures = array();

$drawnFixtures = array();

$allFixtures = array(
[1, 2], [1, 3], [1, 4], [1, 5], [1, 6], [1, 7], [1, 8], [1, 9], [1, 10], [1, 11], [1, 12], [1, 13], [1, 14], [1, 15], [1, 16],
[2, 1], [2, 3], [2, 4], [2, 5], [2, 6], [2, 7], [2, 8], [2, 9], [2, 10], [2, 11], [2, 12], [2, 13], [2, 14], [2, 15], [2, 16],
[3, 1], [3, 2], [3, 4], [3, 5], [3, 6], [3, 7], [3, 8], [3, 9], [3, 10], [3, 11], [3, 12], [3, 13], [3, 14], [3, 15], [3, 16],
[4, 1], [4, 2], [4, 3], [4, 5], [4, 6], [4, 7], [4, 8], [4, 9], [4, 10], [4, 11], [4, 12], [4, 13], [4, 14], [4, 15], [4, 16],
[5, 1], [5, 2], [5, 3], [5, 4], [5, 6], [5, 7], [5, 8], [5, 9], [5, 10], [5, 11], [5, 12], [5, 13], [5, 14], [5, 15], [5, 16],
[6, 1], [6, 2], [6, 3], [6, 4], [6, 5], [6, 7], [6, 8], [6, 9], [6, 10], [6, 11], [6, 12], [6, 13], [6, 14], [6, 15], [6, 16],
[7, 1], [7, 2], [7, 3], [7, 4], [7, 5], [7, 6], [7, 8], [7, 9], [7, 10], [7, 11], [7, 12], [7, 13], [7, 14], [7, 15], [7, 16],
[8, 1], [8, 2], [8, 3], [8, 4], [8, 5], [8, 6], [8, 7], [8, 9], [8, 10], [8, 11], [8, 12], [8, 13], [8, 14], [8, 15], [8, 16],
[9, 1], [9, 2], [9, 3], [9, 4], [9, 5], [9, 6], [9, 7], [9, 8], [9, 10], [9, 11], [9, 12], [9, 13], [9, 14], [9, 15], [9, 16],
[10, 1], [10, 2], [10, 3], [10, 4], [10, 5], [10, 6], [10, 7], [10, 8], [10, 9], [10, 11], [10, 12], [10, 13], [10, 14], [10, 15], [10, 16],
[11, 1], [11, 2], [11, 3], [11, 4], [11, 5], [11, 6], [11, 7], [11, 8], [11, 9], [11, 10], [11, 12], [11, 13], [11, 14], [11, 15], [11, 16],
[12, 1], [12, 2], [12, 3], [12, 4], [12, 5], [12, 6], [12, 7], [12, 8], [12, 9], [12, 10], [12, 11], [12, 13], [12, 14], [12, 15], [12, 16],
[13, 1], [13, 2], [13, 3], [13, 4], [13, 5], [13, 6], [13, 7], [13, 8], [13, 9], [13, 10], [13, 11], [13, 12], [13, 14], [13, 15], [13, 16],
[14, 1], [14, 2], [14, 3], [14, 4], [14, 5], [14, 6], [14, 7], [14, 8], [14, 9], [14, 10], [14, 11], [14, 12], [14, 13], [14, 15], [14, 16],
[15, 1], [15, 2], [15, 3], [15, 4], [15, 5], [15, 6], [15, 7], [15, 8], [15, 9], [15, 10], [15, 11], [15, 12], [15, 13], [15, 14], [15, 16],
[16, 1], [16, 2], [16, 3], [16, 4], [16, 5], [16, 6], [16, 7], [16, 8], [16, 9], [16, 10], [16, 11], [16, 12], [16, 13], [16, 14], [16, 15]
);$w = 0;

while ($w < 30) {

$g = 0;

$games = '<ul class="fixtures">';

while ($g < 8) {

$randomKey = array_rand($allFixtures);
$randomResult = $allFixtures[$randomKey];

$homeTeam = $randomResult[0];
$awayTeam = $randomResult[1];

$fixture = $homeTeam . 'v' . $awayTeam;

if(!in_array($homeTeam,$fixtures) && !in_array($awayTeam,$fixtures) && !in_array($fixture,$drawnFixtures)) {

$fixtures[] = $homeTeam;
$fixtures[] = $awayTeam;
$games .= '<li>' . $fixture . '</li>';

$drawnFixtures[] = $fixture;
$g++;

}

}

$games .= '</ul>';

$w++;
$fixtures = array();

echo $games;

}