php 时间处理函数

// 使用 date() 函数
$current_time = date('Y-m-d H:i:s');
echo "Current time: " . $current_time;

// 使用 DateTime 类
$dateTime = new DateTime();
$current_time = $dateTime->format('Y-m-d H:i:s');
echo "Current time: " . $current_time;

$date = '2023-10-05';
$formatted_date = date('l, F j, Y', strtotime($date));
echo "Formatted date: " . $formatted_date;

$dateTime = new DateTime($date);
$formatted_date = $dateTime->format('l, F j, Y');
echo "Formatted date: " . $formatted_date;

$start_date = '2023-10-01';
$end_date = '2023-10-10';

$interval = strtotime($end_date) - strtotime($start_date);
$days = $interval / (60 * 60 * 24);
echo "Days between: " . $days;

$startDateTime = new DateTime($start_date);
$endDateTime = new DateTime($end_date);
$interval = $startDateTime->diff($endDateTime);
echo "Days between: " . $interval->days;

date_default_timezone_set('Asia/Shanghai');
$current_time = date('Y-m-d H:i:s');
echo "Current time: " . $current_time;

$date = '2023-10-05';
$timestamp = strtotime($date);
if ($timestamp === false) {
    echo "Invalid date format";
} else {
    echo "Timestamp: " . $timestamp;
}