How to Create Random Drawings with PHP

To implement a random draw function, you can use the PHP rand() function to generate random numbers. Here is a simple example:

<?php
$prizes = array(
    '一等奖',
    '二等奖',
    '三等奖',
    '参与奖'
);

$winners = array();

// 随机抽奖
while (count($winners) < 3) {
    $randomIndex = rand(0, count($prizes) - 1);
    $prize = $prizes[$randomIndex];

    // 检查是否已经抽过该奖项
    if (!in_array($prize, $winners)) {
        $winners[] = $prize;
    }
}

// 输出中奖结果
foreach ($winners as $index => $prize) {
    echo '中奖者' . ($index + 1) . '：' . $prize . '<br>';
}
?>

In the code above, the $prizes array stores all the prizes, and the $winners array is used to store the results of the winners. A while loop is used to randomly generate an index using the rand() function, and then retrieve the corresponding prize from the $prizes array. It checks if the prize has already been won, and if not, adds it to the $winners array.

In the above example, we assume that we need to draw 3 winners, you can make modifications according to actual needs. Finally, output the winning results using a foreach loop.