Detailed explanation of PHP time and date functions, detailed explanation of PHP date functions_PHP tutorial

Detailed explanation of PHP time and date functions, detailed explanation of PHP date functions

All functions in PHP are from the UNIX era, that is, starting from January 1, 1970.

The date is the number of seconds since this time.

When a function calls the number of seconds since this time, treat it as a timestamp.

Local time function

1. string date(string format,inieger timestamp)

This function returns a string representing time, which is controlled by string format.
Such as:

<&#63;
print(date("Y年 m月d日");//输出当前,年月日.
print(date("Y年 m月d日",60*60*24*365*10);//输出1980年1月1日.
&#63;>

Maybe you will ask, why is there no timestamp? If timestamp is empty, or does not write, it means using the current time timestamp.
Control character representing the year: Y---four-digit year y---two-digit year
Control character representing the month: m---month from 1-12 F---English month name M---abbreviated month name
The control character representing the day number: d---the day of the month with 0 in front j--the day number without 0 in front
The control symbol representing the day of the week: l--English week D--Abbreviated week
The control character representing the hour: h--hours from 1 to 12 H---hours from 0 to 23
Control symbol indicating morning and afternoon a ---am or pm A ---AM or PM
Control character representing minutes: i---value 00-59
Indicates the number of days in a year: z--the number of days in a year

2. array getdate(integer timestamp)

This function returns a matrix.
Such as:

<&#63;
$current_date=getdate();
print($current_date("hours"));
print($current_date("minutes");
print($current_date("seconds");
&#63;>

Description:
Element Description
hours Hours in 24-hour format
mday Mid-month date
minutes minutes
mon month in numeric form
month Full name of month
seconds seconds
wday Day of the week as a number from 0 to 6
weekday The name of the day of the week
year year
0 timestamp is the number of seconds from January 1, 1970 to the present
yday Numeric date of the year

3. boolean checkdate(integer month,integer day,integer year)
This function checks whether the date is legal. For example:

<&#63;
if(checkdate(2,29,1980))
print("日期合法!n");
&#63;>

4. integer time()

This function obtains the current timestamp. For example:

<&#63;
print(time());//输出一大串整数
&#63;>

5. integer mktime(integer hour,integer minutes,integer seconds,integer month, integer day,integer year)

This function returns the timestamp of the given date, i.e. the number of seconds since January 1, 1970.
If a parameter is out of range, this function can also explain it. For example, 13th is January of the next year.
Such as:

<&#63;
$currenthour=date("H");
print("50个小时后为:");
print(date("h:i A l F dS,Y",mktime($currenthour+50)));
print("<br>n");
&#63;>

6. string microtime()

This function returns a string consisting of the number of milliseconds of the current time, a space, and the number of seconds since 1970

<&#63;
print("start:microtime()<br>n");
for($index=0;$index<1000;$index++)
print("good!");
print("stop:microtime()<br>n");
&#63;>

Also, various Linwich Standard Time functions

The above is the entire content of this article, I hope you all like it.

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