Date function for beginners in PHP

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

The date is the number of seconds from this time.

When a function is called from this When the number of seconds is counted, treat it as a (timestamp) timestamp

Local time function

date() function

<?php
	//时间函数
	//echo date('Y-m-d');
	echo date('Y-m-d H:i:s');
?>

Note: The first one will only output the year, month and day, the second one will output the year, month, day, hour, minute and second.

date() syntax

date(format,timestamp)

Note: The first parameter specifies the format of the date. The second parameter defaults to the current date and time

<?php
	$t = time();
	echo date('Y-m-d H:i:s',$t);
?>

Note:

a - "am" or "pm"
A - "AM" or "PM"
d - day, two digits, if there are less than two digits, please fill in the front Zero; such as: "01" to "31"
D - day of the week, three English letters; such as: "Fri"
F - month, full English name; such as: "January"
h - Hours in 12-hour format; such as: "01" to "12"
H - hours in 24-hour format; such as: "00" to "23"
g - hours in 12-hour format, no less than two digits are allowed Zero padding; such as: "1" to 12"
G - 24-hour hour, no zero padding if there are less than two digits; such as: "0" to "23"
i - minutes; such as: "00" to "59"
j - day, two digits, if there are less than two digits, do not add zeros; such as: "1" to "31"
l - day of the week, full English name; such as: "Friday"
m - month, two digits, if there are less than two digits, add zeros in front; such as: "01" to "12"

n - month, two digits, if there are less than two digits, no Fill with zeros; such as: "1" to "12"
M - month, three English letters; such as: "Jan"
s - seconds; such as: "00" to "59"
S - Add an English ordinal number at the end of the word, two English letters; such as: "th", "nd"
t - the number of days in the specified month; such as: "28" to "31"
U - the total number of seconds
w - numeric day of the week, such as: "0" (Sunday) to "6" (Saturday)
Y - year, four digits; such as: "1999"
y - year, two digits; Such as: "99"
z - the day of the year; such as: "0" to "365"

Use php date function to get the current date

<?php
	$t = time();
	echo date('Y-m-d H:i:s',$t);
?>