reverse.php

<?php

$input = <<<TEXT
// Vote text here
TEXT;

preg_match_all('#-\s*(\w[\w\s\(\)]*):([\s,\w]*)#s', $input, $matches);
list($all, $chosen, $voters) = $matches;
$voters = array_map(function ($item) {return array_map('trim', explode(',', $item));}, $voters);

$reversed = [];
$terbanyak = [];
$banyaknya = 0;

foreach ($voters as $key => $who) {
    if (count($who) > $banyaknya) {
        $terbanyak = [$chosen[$key]];
        $banyaknya = count($who);
    } else if (count($who) == $banyaknya) {
        $terbanyak[] = $chosen[$key];
    }
    foreach ($who as $person) {
        $reversed[$person][] = $chosen[$key];
    }
}

$rendered = "Yg sudah memilih sementara:\n";
foreach ($reversed as $person => $choices) {
    $string = implode(', ', $choices);
    $rendered .= "- {$person}: {$string}\n";
}

$rendered .= "\nMemimpin sementara dengan {$banyaknya} vote: " . implode(', ', $terbanyak) . "\n";
print_r($rendered);