php 抽奖代码

<?php
// 参与者列表
$participants = [
    'Alice',
    'Bob',
    'Charlie',
    'David',
    'Eve'
];

// 随机选择一个获胜者
$winner = $participants[array_rand($participants)];

echo "The winner is: " . $winner;
?>

<?php
// 参与者及其权重
$participants = [
    ['name' => 'Alice', 'weight' => 3],
    ['name' => 'Bob', 'weight' => 1],
    ['name' => 'Charlie', 'weight' => 2],
    ['name' => 'David', 'weight' => 4],
    ['name' => 'Eve', 'weight' => 5]
];

// 计算总权重
$totalWeight = array_sum(array_column($participants, 'weight'));

// 生成一个随机数
$rand = mt_rand(1, $totalWeight);

// 根据权重选择获胜者
$winner = null;
foreach ($participants as $participant) {
    if ($rand <= $participant['weight']) {
        $winner = $participant['name'];
        break;
    }
    $rand -= $participant['weight'];
}

echo "The winner is: " . $winner;
?>