PHP时间操作小结

<?php 

 

//PHP获得当前日期的前一天和后一天

echo date('Y-m-d',time()-86400);

echo date('Y-m-d',time()+86400);

//2011-07-09 2011-07-11

 

//-------------------------------------- 分割线 ------------------------------------

 

//PHP获得明天、上个月、明年

$tomorrow  = date("Y-m-d", mktime(0, 0, 0, date("m")  , date("d")+1, date("Y"))); 

$lastmonth = date("Y-m-d", mktime(0, 0, 0, date("m")-1, date("d"),   date("Y")));

$nextyear  = date("Y-m-d", mktime(0, 0, 0, date("m"),   date("d"),   date("Y")+1));

 

echo $tomorrow.' '.$lastmonth.' '.$nextyear;

//2011-07-11 2011-06-10 2012-07-10

 

//-------------------------------------- 分割线 ------------------------------------

 

//PHP获得指定日期所在星期的第一天和最后一天

function getWeekDay($date){

    $lastday = date("Y-m-d",strtotime("$date Sunday"));

    $firstday = date("Y-m-d",strtotime("$lastday -6 days"));

    return array($firstday,$lastday);

}

 

print_r(getWeekDay("2011-07-10"));

/**

 * Array

 * (

 *   [0] => 2011-07-04

 *  [1] => 2011-07-10

 *)

 */

 

//-------------------------------------- 分割线 -------------------------------

 

//PHP获得指定日期所在月的第一天和最后一天

function getMonthDay($date){

    $firstday = date("Y-m-01",strtotime($date));

    $lastday = date("Y-m-d",strtotime("$firstday +1 month -1 day"));

    return array($firstday,$lastday);

}

 

print_r(getMonthDay("2011-07-10"));

/**

 * Array

 * (

 *   [0] => 2011-07-01

 *  [1] => 2011-07-31

 *)

 */

 

//PHP获得两日期间隔天数[PHP版本>= 5.3 有效]

function getIntervalDay($date1 = null, $date2 = null){

$datetime1 = new DateTime($date1);

$datetime2 = new DateTime($date2);

$interval = $datetime1->diff($datetime2);

return $interval->format('%a');

}

 

function getIntervalDay1($date1 = null, $date2 = null){

$datetime1 = date_create($date1);

$datetime2 = date_create($date2);

$interval = date_diff($datetime1, $datetime2);

return $interval->format('%a');

}

 

echo getIntervalDay('2011-07-25', '2011-07-26');//1

echo getIntervalDay1('2011-07-25', '2011-08-28');//34

?>

 

本文转自

http://flyer0126.iteye.com/blog/1120874