PHP obtains the date (strtotime (), date () _ PHP Tutorial last month, next month, and this month

PHP obtains the date (strtotime (), date () of the previous month, next month, and this month ()). When I was writing a program today, I suddenly found a function that was written a long time ago to get the number of days of the month. The classic switch version, but when I got the number of days of the previous month, I only set the month to 1, it is estimated that when I write a program today, I suddenly find the function to get the number of days of the month written a long time ago. it is a classic switch version, but when I get the number of days of the previous month, I just took the month-1. I guess it was too difficult at the time. then I saw a strange feeling. I wanted to deal with it again, but there must be some very convenient method, so I found the following version and made some minor changes.

Get the date of this month:

  getMonth(      = ("Y-m-01",(      = ("Y-m-d",(" +1 month -1 day"      (, }

$ Firstday is the first day of the month. if $ date is like 2014-2, $ firstday will be. Then, add a month based on $ firstday to, and then subtract one day from, it is really convenient to use date () and strtotime.

Get Last Month Date:

  getlastMonthDays(     =(     =('Y-m-01',(('Y',).'-'.(('m',)-1).'-01'     =('Y-m-d',(" +1 month -1 day"      (, }

You need to get a timestamp for the last month, and then-1 in the month will be OK. the super intelligent date () will convert 2014-0-1 to, which is so nice.

Obtain the date of next month:

  getNextMonthDays(     =(     =(     (['mon'] == 12         =['year'] +1         =['mon'] -11         =.'-0'..'-01'         =('Y-m-d',(" +1 month -1 day"     }         =('Y-m-01',(('Y',).'-'.(('m',)+1).'-01'         =('Y-m-d',(" +1 month -1 day"       (, }

The code for the next month's date looks a little longer, because date () cannot be converted into something similar to 2014-13-01, and it will return directly to 1970, so we need to deal with the issue of December before, in addition to December, the month + 1 is OK.

In general, it is very convenient. the date function is too powerful.

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