在php中从数组中查找最接近的下一个日期

function findClosestDate($targetDate, $datesArray) {
    $closestDate = null;
    $closestDiff = null;
    
    // 遍历日期数组
    foreach ($datesArray as $index => $date) {
        // 将日期字符串转换为时间戳
        $timestamp = strtotime($date);
        
        // 计算日期差值
        $diff = abs($timestamp - strtotime($targetDate));
        
        // 更新最小差值和最接近的日期
        if ($closestDiff === null || $diff < $closestDiff) {
            $closestDiff = $diff;
            $closestDate = $date;
        }
    }
    
    return [
        'closestDate' => $closestDate,
        'closestDiff' => $closestDiff,
        'index' => array_search($closestDate, $datesArray)
    ];
}

// 示例数组
$dates = ['2021-01-01', '2021-01-15', '2021-02-01', '2021-02-15'];

// 设置目标日期
$targetDate = '2021-01-10';

// 查找最接近的日期
$result = findClosestDate($targetDate, $dates);

// 输出结果
echo '目标日期: ' . $targetDate . "\n";
echo '最接近的日期: ' . $result['closestDate'] . "\n";
echo '差值: ' . $result['closestDiff'] . '秒' . "\n";
echo '索引位置: ' . $result['index'] . "\n";

目标日期: 2021-01-10
最接近的日期: 2021-01-15
差值: 432000秒
索引位置: 1