Differenza tra 2 date

[nicola75ss]

<?php
function dateDiff($dateFrom, $dateTo, $unit = 'd')
{
    $difference = null;
     
    $date1 = $dateFrom;
    $date2 = $dateTo;
     
    if( $date1 > $date2 ){
        return null;
    }
     
    $diff = $date2 - $date1;
     
    $days = 0;
    $hours = 0;
    $minutes = 0;
    $seconds = 0;
     
    if ($diff % 86400 <= 0){ 
        $days = $diff / 86400;
    }
     
    if($diff % 86400 > 0){
        $rest = ($diff % 86400);
        $days = ($diff - $rest) / 86400;
         
        if($rest % 3600 > 0 ){
            $rest1 = ($rest % 3600);
            $hours = ($rest - $rest1) / 3600;
             
            if( $rest1 % 60 > 0 ){
                $rest2 = ($rest1 % 60);
                $minutes = ($rest1 - $rest2) / 60;
                $seconds = $rest2;
            }else{
                $minutes = $rest1 / 60;
            }
        }else{
            $hours = $rest / 3600;
        }
    }
     
    switch(strtolower($unit)){
        case 'd':
            $partialDays = 0;
            $partialDays += ($seconds / 86400);
            $partialDays += ($minutes / 1440);
            $partialDays += ($hours / 24);
            $difference = $days + $partialDays;
            break;
             
        case 'h':
            $partialHours = 0;
            $partialHours += ($seconds / 3600);
            $partialHours += ($minutes / 60);
            $difference = $hours + ($days * 24) + $partialHours;
            break;
             
        case 'm':
            $partialMinutes = 0;
            $partialMinutes += ($seconds / 60);
            $difference = $minutes + ($days * 1440) + ($hours * 60) + $partialMinutes;
            break;
             
        case 's':
            $difference = $seconds + ($days * 86400) + ($hours * 3600) + ($minutes * 60);
            break;
             
        case 'a':
            $difference = array (
                "days" => $days,
                "hours" => $hours,
                "minutes" => $minutes,
                "seconds" => $seconds
                 );
            break;
    }
     
    if(is_array($difference)){
        return $difference;
    }else{
        return round($difference);
    }
     
}

$data1 = strtotime("2007-03-02 12:30:00");
$data2 = strtotime("2007-03-04 16:15:00");

echo '<pre>';
print_r(dateDiff($data1,$data2,'a'));
?>