向preg_replace_callback模式添加其他匹配项

$input = "The event is on 2023-10-01 and the time is 14:30:00.";

$pattern = '/\d{4}-\d{2}-\d{2}/'; // 匹配日期格式 YYYY-MM-DD

$output = preg_replace_callback($pattern, function ($matches) {
    $date = DateTime::createFromFormat('Y-m-d', $matches[0]);
    return $date->format('d/m/Y');
}, $input);

echo $output; // 输出: The event is on 01/10/2023 and the time is 14:30:00.

$input = "The event is on 2023-10-01 and the time is 14:30:00.";

$pattern = '/(\d{4}-\d{2}-\d{2})|(\d{2}:\d{2}:\d{2})/'; // 匹配日期格式 YYYY-MM-DD 和时间格式 HH:MM:SS

$output = preg_replace_callback($pattern, function ($matches) {
    if (!empty($matches[1])) {
        // 处理日期格式 YYYY-MM-DD
        $date = DateTime::createFromFormat('Y-m-d', $matches[1]);
        return $date->format('d/m/Y');
    } elseif (!empty($matches[2])) {
        // 处理时间格式 HH:MM:SS
        $time = DateTime::createFromFormat('H:i:s', $matches[2]);
        return $time->format('h:i A'); // 将时间格式转换为 12 小时制
    }
}, $input);

echo $output; // 输出: The event is on 01/10/2023 and the time is 02:30 PM.