How to get the current date and day of the week in php

In PHP, you can use the date() function to get the current date and day of the week. Just omit the second parameter of the date() function and set the first parameter to "Y-m-d H:i:s" to get the current date, the syntax is "date("Y-m-d H:i:s")"; and When the first parameter is set to "N", the day of the week can be obtained with the syntax "date("N")". "N" returns the day of the week as a number in ISO-8601 format, ranging from 1 (for Monday) to 7 (for Sunday).

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

In PHP, you can use date() Function to get the current date and day of the week.

The date() function can obtain the current timestamp and format the timestamp into a more readable date and time. The setting of month, day, and day of the week can also be extracted.

Let’s take a look at the date() function. Its syntax format is:

date(format,timestamp);

• format Required. Specifies the format of the timestamp.

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

Description: The format parameter is used to specify the formatting character and set the converted date format. Mainly uses the format parameter to format the timestamp and obtain the current date and day of the week.

Example 1: Use the date() function to get the current date

<?php 
header("content-type:text/html;charset=utf-8"); 
date_default_timezone_set("PRC");//设置时区
echo "当前时间为："; 
$today = date("Y-m-d H:i:s"); 
echo $today; 
?>

Use the date() function to set various A format for outputting dates, for example:

<?php 
header("content-type:text/html;charset=utf-8"); 
date_default_timezone_set("PRC");//设置时区
echo date("Y/m/d H:i:s") . "<br>"; 
echo date("y/m/d H:i:s") . "<br><br>"; 
echo date("Y-m-d H:i:s") . "<br>"; 
echo date("y-m-d H:i:s") . "<br><br>"; 
echo date("Y.m.d H:i:s") . "<br>"; 
echo date("y.m.d H:i:s") . "<br><br>"; 
?>

Example 2: Use the date() function to get the current day of the week

<?php 
header("content-type:text/html;charset=utf-8"); 
date_default_timezone_set("PRC");//设置时区
echo "今天是星期 ".date("N");
?>

Look at the calendar, right?

Explanation: date() can format the time and use the formatting character "N" to obtain the Sunday number

• N: Return The day of the week represented by numbers in ISO-8601 format (newly added in PHP 5.1.0), ranging from 1 (indicating Monday) to 7 (indicating Sunday)

Extended knowledge: formatting characters that can be set by parameter format

注：format的大小写的区分非常重要

<?php
var_dump(date(&#39;Y-m-d H:i:s&#39;, 1616496304)); //H 24小时制 2021-03-23 18:45:04
var_dump(date(&#39;Y-m-d h:i:s&#39;, 1616496304)); //h 12小时制 2021-03-23 06:45:04
?>

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