count days between two dates

    //function that will count days
    function countdays($date1, $date2){
        $days = abs(strtotime($date1)-strtotime($date2)) / 86400;
        return $days;
    }

    //lets assign values
    $date1 = '2008-08-17';
    $date2 = '2008-08-12';
    echo countdays($date1, $date2); //executes our function

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