PHP gets time to calculate the difference

Get the time stamp for this week, the first day of the month, and the last day with PHP.

1, get today's time range:

2, get the timestamp of the first day/last day of the week

<?php$year = Date ("Y"), $month = Date ("M"), $day = Date (' W '), $nowMonthDay = Date ("T"), $firstday = Date (' d ')-$day; if (sub STR ($firstday, 0,1) = = "-") {$firstMonth = $month-1; $lastMonthDay = date ("T", $firstMonth); $firstday = $lastMonthDay-S Ubstr ($firstday, 1); $time _1 = Strtotime ($year. " -". $firstMonth." -". $firstday);} else{$time _1 = Strtotime ($year. " -". $month." -". $firstday);}  $lastday = Date (' d ') + (7-$day), if ($lastday > $nowMonthDay) {$lastday = $lastday-$nowMonthDay; $lastMonth = $month + 1; $time _2 = Strtotime ($year. " -". $lastMonth." -". $lastday);} else{$time _2 = Strtotime ($year. " -". $month." -". $lastday);}

3, get the time stamp of the first day/last day of this month

<?php$year = Date ("Y"), $month = Date ("M"), $allday = Date ("T"), $strat _time = Strtotime ($year. " -". $month." -1 "); $end _time = Strtotime ($year." -". $month." -". $allday);

Calculate Time Difference

$one = Strtotime (' 2011-12-08 07:02:40 ');//Start time timestamp
$tow = Strtotime (' 2011-12-25 00:00:00 ');//End time Timestamp
$cle = $tow-$one; The time stamp difference value is obtained

$d = Floor ($cle/3600/24);
$h = Floor (($cle% (3600*24))/3600); % take-up
$m = Floor (($cle% (3600*24)) 600/60);
$s = floor (($cle% (3600*24));

echo "Two time difference $d days $h hours $m minutes $s seconds"

PHP gets time to calculate the difference