PHP: getting the date (strtotime, date) of the previous month, next month, and this month _ PHP Tutorial-php Tutorial

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:

The code is as follows:

Function getMonth ($ date ){
$ Firstday = date ("Y-m-01", strtotime ($ date ));
$ Lastday = date ("Y-m-d", strtotime ("$ firstday + 1 month-1 day "));
Return array ($ firstday, $ lastday );
}

$ 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:

The code is as follows:

Function getlastMonthDays ($ date ){
$ Timestamp = strtotime ($ date );
$ Firstday = date ('Y-m-01 ', strtotime (date ('Y', $ timestamp ). '-'. (date ('M', $ timestamp)-1 ). '-01 '));
$ Lastday = date ('Y-m-D', strtotime ("$ firstday + 1 month-1 day "));
Return array ($ firstday, $ lastday );
}

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:

The code is as follows:

Function getNextMonthDays ($ date ){
$ Timestamp = strtotime ($ date );
$ Arr = getdate ($ timestamp );
If ($ arr ['mon'] = 12 ){
$ Year = $ arr ['Year'] + 1;
$ Month = $ arr ['mon']-11;
$ Firstday = $ year. '-0'. $ month.'-01 ';
$ Lastday = date ('Y-m-D', strtotime ("$ firstday + 1 month-1 day "));
} Else {
$ Firstday = date ('Y-m-01 ', strtotime (date ('Y', $ timestamp ). '-'. (date ('M', $ timestamp) + 1 ). '-01 '));
$ Lastday = date ('Y-m-D', strtotime ("$ firstday + 1 month-1 day "));
}
Return array ($ firstday, $ lastday );
}

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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