How to set date in php

The PHP Date() function formats a timestamp into a more readable date and time.

Syntax:

date(format,timestamp)

format Required. Specifies the format of the timestamp.

timestamp Optional. Specify timestamp. The default is the current time and date.

Note: A timestamp is a sequence of characters that represents the date and event when a specific event occurred.

Get a simple date

The format parameters of the date() function are required and they specify how to format the date or time.

The following are some commonly used characters for dates:

d - represents the day of the month (01-31) m - represents the month (01-12) Y - represents the year ( Four digits) 1 - Indicates the day of the week

Other characters, such as "/", "." or "-" can also be inserted into the characters to add other formats.

The following examples format today's date in three different ways:

Example

<?php
echo "今天是 " . date("Y/m/d") . "<br>";
echo "今天是 " . date("Y.m.d") . "<br>";
echo "今天是 " . date("Y-m-d") . "<br>";
echo "今天是 " . date("l");
?>

PHP Tip - Automatic Copyright Year

Use the date() function to automatically update the version year on your website:

Example

© 2010-<?php echo date("Y")?>

Get a simple time

The following characters are commonly used for time:

h - 12-hour hour format with leading zero i - minutes with leading zero s - seconds with leading zero ( 00 -59) a - lowercase noon and afternoon (am or pm)

The following example outputs the current time in the specified format:

Example

<?php
echo "现在时间是 " . date("h:i:sa");
?>

Comments: Please Note that the PHP date() function returns the current date/time of the server!

Get the time zone

If the time returned from the code is not the correct time, it is possible that your server is located in another country or is set to Different time zones.

So if you need an accurate time based on a specific location, you can set the time zone to use.

The following example sets the time zone to "Asia/Shanghai", and then outputs the current time in the specified format:

Example

<?php
date_default_timezone_set("Asia/Shanghai");
echo "当前时间是 " . date("h:i:sa");
?>

Create date through PHP mktime()

The optional timestamp parameter in the date() function specifies the timestamp. If you do not specify a timestamp, the current date and time will be used (as in the example above).

The mktime() function returns the Unix timestamp of a date. A Unix timestamp contains the number of seconds between the Unix epoch (January 1, 1970 00:00:00 GMT) and the specified time.

语法：

mktime(hour,minute,second,month,day,year)

下面的例子使用 mktime() 函数中的一系列参数来创建日期和时间：

实例

<?php
$d=mktime(9, 12, 31, 6, 10, 2015);
echo "创建日期是 " . date("Y-m-d h:i:sa", $d);
?>

通过 PHP strtotime() 用字符串来创建日期

PHP strtotime() 函数用于把人类可读的字符串转换为 Unix 时间。

语法

strtotime(time,now)

下面的例子通过 strtotime() 函数创建日期和时间：

实例

<?php
$d=strtotime("10:38pm April 15 2015");
echo "创建日期是 " . date("Y-m-d h:i:sa", $d);
?>

PHP 在将字符串转换为日期这方面非常聪明，所以您能够使用各种值：

实例

<?php
$d=strtotime("tomorrow");
echo date("Y-m-d h:i:sa", $d) . "<br>";
$d=strtotime("next Saturday");
echo date("Y-m-d h:i:sa", $d) . "<br>";
$d=strtotime("+3 Months");
echo date("Y-m-d h:i:sa", $d) . "<br>";
?>

不过，strtotime() 并不完美，所以请记得检查放入其中的字符串。（php视频教程）

更多日期实例

下例输出下周六的日期：

实例

<?php
$startdate = strtotime("Saturday");
$enddate = strtotime("+6 weeks",$startdate);
while ($startdate < $enddate) {
  echo date("M d", $startdate),"<br>";
  $startdate = strtotime("+1 week", $startdate);
}
?>

下例输出七月四日之前的天数：

实例

<?php
$d1=strtotime("December 31");
$d2=ceil(($d1-time())/60/60/24);
echo "距离十二月三十一日还有：" . $d2 ." 天。";
?>

The above is the detailed content of How to set date in php. For more information, please follow other related articles on the PHP Chinese website!