Usage of strtotime() function in php

One, get the unix timestamp of the specified date

strtotime("2009-1-22") The example is as follows:

1.echo strtotime("2009-1-22")

Result: 1232553600

Instructions: Return January 22, 2009 0:00:00 seconds timestamp

Second, get the English text date and time, the example is as follows:

For easy comparison, use date to convert the current timestamp and the specified timestamp into system time.

( 1) Print the timestamp of tomorrow at this time strtotime("+1 day")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09 :40:25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("+1 day"))

Result: 2009-01-23 09:40:25

(2 )Print the timestamp of yesterday at this time strtotime("-1 day")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09: 40:25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("-1 day"))

Result: 2009-01-21 09:40:25

(3) Print the timestamp of next week strtotime("+1 week")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09 :40:25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("+1 week"))

Result: 2009-01-29 09:40:25

(4 )Print the timestamp at this time last week strtotime("-1 week")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09:40:25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("-1 week"))

Result: 2009-01-15 09:40:25

( 5) Print the timestamp of the specified next day of the week strtotime("next Thursday")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09 :40:25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("next Thursday"))

Result: 2009-01-29 00:00:00

(6) Print the timestamp of the specified day of the week strtotime("last Thursday")

Current time: 1.echo date("Y-m-d H:i:s",time())

Result: 2009-01-22 09:40 :25

Specified time: 1.echo date("Y-m-d H:i:s",strtotime("last Thursday"))

Result: 2009-01-15 00:00:00

As can be seen from the above example, strtotime It can parse the date and time description of any English text into a Unix timestamp. We combine mktime() or date() to format the date and time to obtain the specified timestamp and achieve the required date and time.