php: datetime() difference between 2 datetime with 2 variables

Question

I have in my database 4 columns which are:

Date_in | Time_in | Date_out | Time_out

Date_in and Time_in belong together (e.g., 2013-02-18 13

Answer 1

$diff = abs( strtotime( '2014-04-25 16:00:00' ) - strtotime( '2014-04-27 18:02:00' ) );

if(sprintf("%d",intval( $diff / 86400 )) != '0'){
    if(sprintf("%d",intval( $diff / 86400 )) == '1'){
        echo sprintf("%02d day ", intval( $diff / 86400 ));
    }else{
        echo sprintf("%02d days ", intval( $diff / 86400 ));
    }
}
if(intval( ( $diff % 86400 ) / 3600) != '0'){
    if(intval( ( $diff % 86400 ) / 3600) == '1'){
        echo sprintf("%02d hour ", intval( ( $diff % 86400 ) / 3600));
    }else{
        echo sprintf("%02d hours ", intval( ( $diff % 86400 ) / 3600));
    }
}
if(intval( ( $diff / 60 ) % 60 ) != '0'){
    if(intval( ( $diff / 60 ) % 60 ) == '1'){
        echo sprintf("%02d min", intval( ( $diff / 60 ) % 60 ));
    }else{
        echo sprintf("%02d mins", intval( ( $diff / 60 ) % 60 ));
    }
}