Data in php

[clasku]

un esempio usando datetime:

function calculate_days_difference($datetime_start, $datetime_to_compare) {
    $diff = $datetime_start->diff($datetime_to_compare);
    
    $diff_days = $diff->format("%a");
    $diff_sign = $diff->format("%R");

    switch (true) {
        case $diff_days > 1:
            $day_tag = "giorni";
            break;
        case $diff_days == 1:
            $day_tag = "giorni";
            break;
        case $diff_days == 0 and $diff_sign == "-":
            return "oggi";
            break;
        case $diff_days == 0 and $diff_sign == "+":
            $day_tag = "giorno";
            break;        
        default:
            return "qualcosa è andato storto";
            break;
    }

    switch ($diff_sign) {
        case '-':
            return "$diff_days $day_tag fa";
        case '+':
            $diff_days += 1;
            return "tra $diff_days $day_tag";
        default:
            return false;
    }
}

$datetimezone = new DateTimeZone("UTC");
$now = new DateTime("now", $datetimezone);
$date_to_compare = new DateTime("2017-06-17", $datetimezone);

$diff = $now->diff($date_to_compare);

echo "inizio: " . $now->format("Y-m-d H:i:s") . "\n";
echo "fine: " . $date_to_compare->format("Y-m-d H:i:s") . "\n";
echo $diff->format("%R%a giorni %h ore") . "\n";

echo calculate_days_difference($now, $date_to_compare) . "\n";
?>