PHP's date () gets a solution with the current time less than 8 hours

Title: PhP's date () solution with the current time less than 8 hours

Abstract: The current time obtained by date () in PHP is inconsistent with the actual local time. It is exactly eight hours behind Beijing time.

Difficulty: 20

If you want to get the current time for PHP beginners, you can use the time function date () to format a local time/date and write a test code:

<〈? PHP Echo date ('Y-m-d h: I: s '); ? > 〉

Output Current Time: 02:32:17
The actual time is 10:32:17.
Is it because the date () Time in PHP is incorrect and 8 hours less?
Let's take a look at the "Example 1. Date () Example" in the PHP Manual. The first line has a time zone setting.

// Set the default time zone to use. Available in PHP 5.1 Date_default_timezone_set ('utc ');

The date. timezone option is added to PhP. ini at php5.1. it is disabled by default.

That is, the displayed time (no matter what php Command is used) is Greenwich Mean Time, which is exactly eight hours behind Beijing time.

How to set the correct time.

1. The simplest method is not to use php5.1 or a later version-obviously this is not an advisable method !!!

2. Modify PHP. ini. Open PHP. ini to search for date. timezone and remove the semicolon = followed by Asia/Shanghai. Restart the Apache server. The disadvantage is that if the program
Put it on someone else's server and cannot modify PHP. ini.

3. Add the initialization Statement of time to the program: "date_default_timezone_set (" Asia/Shanghai ");" which can be set by the programmer at will.
Recommendation.
Time zone identifier, available value in mainland China: PRC, Asia/Chongqing, Asia/Shanghai, Asia/Urumqi (China, Chongqing, Shanghai, Urumqi), ETC/GMT-8, asia/Harbin
Available in Hong Kong and Taiwan regions: Asia/Macao, Asia/hong_kong, Asia/Taipei (in the order of Macao, Hong Kong, and Taipei)
Singapore: Asia/Singapore

In this way, the output is Beijing time.
More detailed time zone Code Time Zone encoding time zone index codeTimezone_identifier

You can check it on the official website.

Http://cn2.php.net/manual/en/function.date-default-timezone-set.php View "Parameters" list of supported timezones . Or directly view: http://cn2.php.net/manual/en/timezones.php

 

Appendix:
Date

(PHP 3, PHP 4, PHP 5)

Date -- format a local time/date
Description
String date (string format [, int timestamp])

Returns the string generated by the integer timestamp according to the given format string. If no timestamp is provided, the current local time is used. In other words, timestamp is optional and the default value is time ().
Table 1. The format strings can recognize the followingFormat
Parameter string

Format Character	Description	Return Value example
Day	---	---
D	The day of the month, which has two digits leading to zero	01 To31
D	The day of the week. The text indicates three letters.	Mon ToSun
J	The day of the month, with no leading zero	1 To31
L (Lowercase letters of "L)	Day of week, complete text format	Sunday ToSaturday
N	The day of the week represented by a number in the ISO-8601 format (New in PHP 5.1.0)	1 (Monday)7 (Sunday)
S	English suffix after the number of days per month, 2 Characters	St ,Nd ,Rd OrTh . AndJ Use together
W	The day of the week, represented by a number	0 (Sunday)6 (Saturday)
Z	The day of the year.	0 To366
Week	---	---
W	The week of the year in ISO-8601 format, starting from Monday each week (New in PHP 4.1.0)	For example:42 (The first week of the year)
Month	---	---
F	The month in the complete text format, such as January or march.	January ToDecember
M	Number indicates the month, with a leading zero	01 To12
M	The month abbreviated to three characters.	Jan ToDec
N	Number indicates the month, with no leading zero	1 To12
T	Number of days in a given month	28 To31
Year	---	---
L	Is it a leap year?	If the leap year is1 Otherwise0
O	The number of years in ISO-8601 format. This andY Except for the week number of ISO (W ) Belongs to the previous year or the next year, that year is used. (New PHP 5.1.0)	Examples:1999 Or2003
Y	The year in which the four digits represent the complete number.	For example:1999 Or2003
Y	A two-digit year	For example:99 Or03
Time	---	---
A	Morning and afternoon values in lower case	AM OrPM
A	Upper-case morning and afternoon values	AM OrPM
B	Swatch Internet standard	000 To999
G	Hour, 12-hour format, no leading zero	1 To12
G	Hour, in 24-hour format, no leading zero	0 To23
H	Hour, 12-hour format, with leading zero	01 To12
H	Hour, in 24-hour format, with a leading zero	00 To23
I	Minutes with a leading zero	00 To59 >
S	Number of seconds, with a leading zero	00 To59 >
Time Zone	---	---
E	Time zone ID (New in PHP 5.1.0)	For example:UTC ,GMT ,Atlanta/Azores
I	When it is enabled or not	If it is enabled1 Otherwise0
O	Hours different from Greenwich Mean Time	For example:+ 0200
T	Time zone of the Local Machine	For example:EST ,MDT ([Note] the full text format is in windows. For example, "Eastern Standard Time", the Chinese version displays "China Standard Time ").
Z	The number of seconds of the time difference offset. The Time Zone offset to the west of UTC is always negative, and the time zone offset to the east of UTC is always positive.	-43200 To43200
Complete date/time	---	---
C	Date in ISO 8601 format (New in PHP 5)	2004-02-12t15: 19: 21 + 00: 00
R	Date in RFC 822 format	For example:Thu, 21 Dec 2000 16:01:07 + 0200
U	Number of seconds since UNIX epoch (January 1 1970 00:00:00 GMT)	SeeTime ()

Author: Lu Haipeng

From: itstudy.cn original

Update log: the revised version of v0.2 has been completed;

Reference:

Thanks:

Discussion URL: http://www.deepteach.com/bbs/

Tag (TAGS): PhP date