PHP的date函数可以完成这项工作。

日期()

描述:

string date(string $format [, int $timestamp = time()])

返回根据给定格式字符串使用给定整数时间戳格式化的字符串，如果没有给出时间戳则返回当前时间。

例子:

$today = date("F j, Y, g:i a");               // March 10, 2001, 5:16 pm
$today = date("m.d.y");                       // 03.10.01
$today = date("j, n, Y");                     // 10, 3, 2001
$today = date("Ymd");                         // 20010310
$today = date('h-i-s, j-m-y, it is w Day');   // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.'); // it is the 10th day.
$today = date("D M j G:i:s T Y");             // Sat Mar 10 17:16:18 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h');   // 17:03:18 m is month
$today = date("H:i:s");                       // 17:16:18
$today = date("Y-m-d H:i:s");                 // 2001-03-10 17:16:18 (the MySQL DATETIME format)

下面是一些常用的表示时间的字符:

d -表示一个月中的第一天(01 ~ 31) m -代表一个月(01 ~ 12) Y -年份(四位数) l(小写“l”)-代表星期几 H -以小时为单位的24小时格式(00至23) H -以前导零表示的12小时格式(01到12) i -前导0的分钟(00到59) s -前导0的秒(00到59) a -小写的子午线前后(am或pm)

例子:

echo "Today " . date("Y/m/d") ;
echo "time " . date("h:i:sa");

非常简单 echo $date = date('Y-m-d H:i:s');

<?php
// Assuming today is March 10th, 2001, 5:16:18 pm, and that we are in the
// Mountain Standard Time (MST) Time Zone

$today = date("F j, Y, g:i a");                 // March 10, 2001, 5:16 pm
$today = date("m.d.y");                         // 03.10.01
$today = date("j, n, Y");                       // 10, 3, 2001
$today = date("Ymd");                           // 20010310
$today = date('h-i-s, j-m-y, it is w Day');     // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.');   // it is the 10th day.
$today = date("D M j G:i:s T Y");               // Sat Mar 10 17:16:18 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h');     // 17:03:18 m is month
$today = date("H:i:s");                         // 17:16:18
$today = date("Y-m-d H:i:s");                   // 2001-03-10 17:16:18 (the MySQL DATETIME format)
?>

// Simply:
$date = date('Y-m-d H:i:s');

// Or:
$date = date('Y/m/d H:i:s');

// This would return the date in the following formats respectively:
$date = '2012-03-06 17:33:07';
// Or
$date = '2012/03/06 17:33:07';

/** 
 * This time is based on the default server time zone.
 * If you want the date in a different time zone,
 * say if you come from Nairobi, Kenya like I do, you can set
 * the time zone to Nairobi as shown below.
 */

date_default_timezone_set('Africa/Nairobi');

// Then call the date functions
$date = date('Y-m-d H:i:s');
// Or
$date = date('Y/m/d H:i:s');

// date_default_timezone_set() function is however
// supported by PHP version 5.1.0 or above.

有关时区参考，请参见支持的时区列表。

获取当前时间和日期的最佳方法是使用PHP中的date函数:

$date = date('FORMAT'); // FORMAT E.g.: Y-m-d H:i:s

$current_date = date('Y-m-d H:i:s');

使用Unix时间戳:

$now_date = date('FORMAT', time()); // FORMAT Eg : Y-m-d H:i:s

设置服务器时区。

date_default_timezone_set('Asia/Calcutta');

这里有一个不同的时区列表。