PHP计算两个时间之差的函数(年,月,周,日,小时,分钟,秒数)

 1 <? PHP
 2 //  时间格式为YYYYMMDDHHmmss
 3 function  timeDiff( $aTime , $bTime )
 4 {
 5 // 分割第一个时间
 6      $ayear   =   substr ( $aTime , 0 , 4 );
 7      $amonth   =   substr ( $aTime , 4 , 2 );
 8      $aday   =   substr ( $aTime , 6 , 2 );
 9      $ahour   =   substr ( $aTime , 8 , 2 );
10      $aminute   =   substr ( $aTime , 10 , 2 );
11      $asecond   =   substr ( $aTime , 12 , 2 );
12 // 分割第二个时间
13      $byear   =   substr ( $bTime , 0 , 4 );
14     $bmonth   =   substr ( $bTime , 4 , 2 );
15     $bday   =   substr ( $bTime , 6 , 2 );
16     $bhour   =   substr ( $bTime , 8 , 2 );
17     $bminute   =   substr ( $bTime , 10 , 2 );
18    $bsecond   =   substr ( $bTime , 12 , 2 );
19 // 生成时间戳
20    $a   =   mktime ( $ahour , $aminute , $asecond , $amonth , $aday , $ayear );
21    $b   =   mktime ( $bhour , $bminute , $bsecond , $bmonth , $bday , $byear );
22    $timeDiff [ ' second ' ]  =   $a - $b ;
23 // 采用了四舍五入,可以修改
24   $timeDiff [ ' mintue ' ]  =   round ( $timeDiff [ ' second ' ] / 60 );
25   $timeDiff [ ' hour ' ]  =   round ( $timeDiff [ ' mintue ' ] / 60 );
26   $timeDiff [ ' day ' ]  =   round ( $timeDiff [ ' hour ' ] / 24 );
27   $timeDiff [ ' week ' ]  =   round ( $timeDiff [ ' day ' ] / 7 );
28   $timeDiff [ ' month ' ]  =   round ( $timeDiff [ ' day ' ] / 30 );  // 按30天来算
29   $timeDiff [ ' year ' ]  =   round ( $timeDiff [ ' day ' ] / 365 );  // 按365天来算 
30   return   $timeDiff ;
31 }
32 ?>

用法:
$a=timeDiff("20060613161000","20040613150000");
print_r($a);

返回一个数组,可以用下标直接输出来年,月,周,日,小时,分钟,秒数之差