PHP gets the dates of last month, next month, and this month (strtotime(), date())_PHP tutorial

When I was writing a program today, I suddenly discovered a function that I wrote a long time ago to get the number of days in the month. It is a classic switch version. But when I got the number of days in the previous month, I just changed the month to -1. I guess it was too much at that time. I'm sleepy, and I felt a bit creepy when I saw it again. I originally wanted to deal with it again, but then I thought there must be some super convenient method, so I found the version below and made a few minor modifications.

Get the date of this month:

<span 1</span> <span function</span> getMonth(<span $date</span><span ){
</span><span 2</span>     <span $firstday</span> = <span date</span>("Y-m-01",<span strtotime</span>(<span $date</span><span ));
</span><span 3</span>     <span $lastday</span> = <span date</span>("Y-m-d",<span strtotime</span>("<span $firstday</span> +1 month -1 day"<span ));
</span><span 4</span>     <span return</span> <span array</span>(<span $firstday</span>,<span $lastday</span><span );
</span><span 5</span> }

$firstday is the first day of the month. If $date is 2014-2, $firstday will be 2014-02-01. Then add one month to $firstday to get 2014-03-01, and then subtract one day. It is 2014-02-28. It is so convenient to use date() and strtotime().

Get the date of last month:

<span 1</span> <span function</span> getlastMonthDays(<span $date</span><span ){
</span><span 2</span>     <span $timestamp</span>=<span strtotime</span>(<span $date</span><span );
</span><span 3</span>     <span $firstday</span>=<span date</span>('Y-m-01',<span strtotime</span>(<span date</span>('Y',<span $timestamp</span>).'-'.(<span date</span>('m',<span $timestamp</span>)-1).'-01'<span ));
</span><span 4</span>     <span $lastday</span>=<span date</span>('Y-m-d',<span strtotime</span>("<span $firstday</span> +1 month -1 day"<span ));
</span><span 5</span>     <span return</span> <span array</span>(<span $firstday</span>,<span $lastday</span><span );
</span><span 6</span> }

You need to get a timestamp for the last month’s date, and then add -1 to the month. The super smart date() will convert things like 2014-0-1 into 2013-12-01. It’s so cool. .

Get next month’s date:

<span  1</span> <span function</span> getNextMonthDays(<span $date</span><span ){
</span><span  2</span>     <span $timestamp</span>=<span strtotime</span>(<span $date</span><span );
</span><span  3</span>     <span $arr</span>=<span getdate</span>(<span $timestamp</span><span );
</span><span  4</span>     <span if</span>(<span $arr</span>['mon'] == 12<span ){
</span><span  5</span>         <span $year</span>=<span $arr</span>['year'] +1<span ;
</span><span  6</span>         <span $month</span>=<span $arr</span>['mon'] -11<span ;
</span><span  7</span>         <span $firstday</span>=<span $year</span>.'-0'.<span $month</span>.'-01'<span ;
</span><span  8</span>         <span $lastday</span>=<span date</span>('Y-m-d',<span strtotime</span>("<span $firstday</span> +1 month -1 day"<span ));
</span><span  9</span>     }<span else</span><span {
</span><span 10</span>         <span $firstday</span>=<span date</span>('Y-m-01',<span strtotime</span>(<span date</span>('Y',<span $timestamp</span>).'-'.(<span date</span>('m',<span $timestamp</span>)+1).'-01'<span ));
</span><span 11</span>         <span $lastday</span>=<span date</span>('Y-m-d',<span strtotime</span>("<span $firstday</span> +1 month -1 day"<span ));
</span><span 12</span> <span     }
</span><span 13</span>     <span return</span> <span array</span>(<span $firstday</span>,<span $lastday</span><span );
</span><span 14</span> }

The code for next month’s date seems a little longer, because date() cannot convert things like 2014-13-01, it will go back directly to 1970, so we need to deal with the issue of December in the front, except for December Just +1 for the month and that’s it.

Generally speaking, it is very convenient. The date function is too powerful.

http://www.bkjia.com/PHPjc/729838.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/729838.htmlTechArticleWhen I was writing a program today, I suddenly discovered a function that I wrote a long time ago to get the number of days in the month, the classic switch version , but when getting the number of days in the previous month, I just reduced the month by -1, which is probably...