How to use strtotime function in PHP

How to use the strtotime function in PHP ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​                  
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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]

strtotime("2009-1-22") Examples are as follows:

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



Result: 1232553600

Description: Return the timestamp of 0:00:00 on January 22, 2009

Second, get the English text date and time

The example is as follows:

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

(1) Print the timestamp at this time tomorrow 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 last week The timestamp at this time 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 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 mktime() or date() to format the date and time to obtain the specified timestamp to achieve what is needed. date and time.

I hope that after the introduction of this article, you can master the usage of strtotime function.



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