PHP Time Calculation related issues summary PHP calculation execution time PHP day timestamp calculation PHP calculation remaining

This paper summarizes the problems related to PHP time calculation. Share to everyone for your reference, as follows:

1. PHP Gets the date three months ago

<?php header ("content-type:text/html; Charset=utf-8 ");? ><?php$s_sdate=date ("y-m-d"); Current time $moth_day=90; Month (converted to days) $s _edate=date ("y-m-d", (Strtotime ($s _sdate)-$moth _day*84600); Echo $moth _day. " Before the date is ". $s _edate;? >

2. Calculation Date 30 days later

You can use strtotime PHP to provide a super-simple way to do the work that would have been dozens of lines of code.

Convert a date to a UNIX timestamp first

$t = time (); Current timestamp $t = Strtotime ("+30 days", $t); 30 days after the timestamp echo date ("y-m-d", $t); Formatted date

3. Convert time stamp for 2nd period ... and subtract.

$t 1 = strtotime ("2009-08-19"), $t 2 = strtotime ("2009-08-20"), $t = $t 2-$t 1; seconds echo (int) ($t/86400) difference in number of days

4. Judging if this is the week

$date = "2008-12-08", if (Iscurrentweeks ($date)) {  echo $date. Is this week ";} else {  echo $date. " Not this week ";} function Iscurrentweeks ($d) {  return (date ("W", Strtotime ($d)) ==date ("W", Strtotime ("Now"));}

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