<?php

function timeDiff($t1, $t2)

{

if($t1 > $t2)

{

$time1 = $t2;

$time2 = $t1;

}

else

{

$time1 = $t1;

$time2 = $t2;

}

$diff = array(

'years' => 0,

'months' => 0,

'weeks' => 0,

'days' => 0,

'hours' => 0,

'minutes' => 0,

'seconds' =>0

);

foreach(array('years','months','weeks','days','hours','minutes','seconds')

as $unit)

{

while(TRUE)

{

$next = strtotime("+1 $unit", $time1);

if($next < $time2)

{

$time1 = $next;

$diff[$unit]++;

}

else

{

break;

}

}

}

return($diff);

}

 
 
$start = strtotime('2007-01-15 07:35:55');

$end = strtotime('2009-11-09 13:01:00');

$diff = timeDiff($start, $end);

$output = "The difference is:";

foreach($diff as $unit => $value)

{

echo " $value $unit,";

}

$output = trim($output, ',');

echo $output;

?>