PHP怎的计算两个日期相差几个月

PHP怎样计算两个日期相差几个月？

<br />
<?php<br />
function getMonthNum( $date1, $date2, $tags='-' ){<br />
  $date1 = explode($tags,$date1);<br />
  $date2 = explode($tags,$date2);<br />
  return abs($date1[0] - $date2[0]) * 12 + abs($date1[1] - $date2[1]);<br />
 }<br />
<br />
echo getMonthNum("2013-02-01","2014-01-01",'-');<br />
<br />
?><br />

以上代码计算出相差13个月，不知道该怎么改才能正常一些？

php date

分享到：

------解决方案--------------------
去掉 abs
返回 -11 表示 2013-02-01 比 2014-01-01 少 11 个月
当然你也可以将整个返回值 abs，但这样就只是知道差 11 个月，但不知道是多了还是少了
------解决方案--------------------

<br />
<br />
function getMonthNum($date1,$date2){<br />
	$date1_stamp=strtotime($date1);<br />
	$date2_stamp=strtotime($date2);<br />
	list($date_1['y'],$date_1['m'])=explode("-",date('Y-m',$date1_stamp));<br />
	list($date_2['y'],$date_2['m'])=explode("-",date('Y-m',$date2_stamp));<br />
	return abs($date_1['y']-$date_2['y'])*12 +$date_2['m']-$date_1['m'];<br />
 }<br />
 <br />
echo getMonthNum("2013-02-01","2014-01-01");<br />
<br />
echo getMonthNum("20130201","20140101");<br />
<br />
echo getMonthNum("201302","201401");<br />
<br />

------解决方案--------------------

<br />
<?php<br />
function getMonthNum( $date1, $date2, $tags='-' ){<br />
  $date1 = explode($tags,$date1);<br />
  $date2 = explode($tags,$date2);<br />
  if ($date1[0]>=$date2[0]){<br />
  return abs($date1[0] - $date2[0]) * 12 + abs($date1[1] - $date2[1]);<br />
  }<br />
  else{<br />
  return abs($date2[0] - $date1[0]) * 12 - abs($date1[1] - $date2[1]);<br />
  }<br />
 }<br />
<br />
echo getMonthNum("2013-02-01","2014-01-01",'-');<br />
<br />
?><br />
<br />

------解决方案--------------------
上面写错了。。。。。重发：

<br>
<br>
function getMonthNum($date1,$date2){ <div class="clear">
                 
              
              
        
            </div>

Related labels：

abs date explode nbsp

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