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);
?>
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