Detailed explanation of how to use strtotime function in PHP_PHP tutorial

There is a function called strtotime in PHP. strtotime implementation function: get the timestamp of a certain date, or get the timestamp of a certain time. strtotime parses the date and time description of any English text into a Unix timestamp [convert system time into a unix timestamp]

One, obtains the unix timestamp of the specified date

strtotime("2009- 1-22") Example is as follows:
1.echo strtotime("2009-1-22")
Result: 1232553600
Description: Returns the timestamp of 0:00:00 on January 22, 2009

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 tomorrow The timestamp 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 at this time 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 day of the next 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 can parse the date and time description of any English text into a Unix timestamp. We combine the mktime() or date() formatted date and time to obtain the specified timestamp to achieve what is needed. Date time.
I hope that after the introduction of this article, you can master the usage of strtotime function.

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