Adding hours to datetime

[blak422]

I am working on a water mgmnt sys for a company and need to add hours to a datetime value in oder to produce a projected datetime value. I dont know if this can be done but any help would be great.

//MAX_TOP = 96 inches
//BARRELS_PER_INCH = 1.67 bbl or barrels per hour

$last_bottom = $row['bottom'];//lets say 33 inches
$last_pulled = $row['last_pulled'];//2012-07-31 09:39:14 
$bbl = $row['bbl_per_hour'];//12.70 barrels per hout
        
$projected_fill = MAX_TOP - $last_bottom;
$projected_barrels = $projected_fill * BARRELS_PER_INCH;
$time_to_fill = $projected_barrels/$bbl;

the result here $time_to_fill gives about 8.2 hours now I need to add this to $last_pulled to get my projected datetime.

Thakns

[blak422]

Well I found my answer

$exploded_time = explode('.', $time_to_fill);
$hours = $exploded_time[0];
$frac_hours = '.'.$exploded_time[1];
$minutes = floor($frac_hours*60);
$projected = strtotime($last_pulled." +".$hours." hours"." +".$minutes." minutes");
echo date("F j, Y H:i:s",$projected);

in case you were wondering