PHP filter and sum array values - php

Question

I've got a php script with following array (date,task,actor,hh:mm).
Array
(
[0] => 2013-01-29|Making movies|Laurel|07:30
[1] => 2013-01-29|Making movies|Hardy|00:30
[2] => 2013-01-29|Learning PHP|Hardy|07:00
[3] => 2013-01-29|Singing autographs|Keaton|07:30
[4] => 2013-01-29|Making movies|Lloyd|07:30
[5] => 2013-01-28|Learning PHP|Laurel|07:30
[6] => 2013-01-28|Making movies|Hardy|07:30
[7] => 2013-01-28|Learning PHP|Keaton|07:30
[8] => 2013-01-28|Making movies|Lloyd|07:30
[9] => 2013-01-27|Learning PHP|Laurel|05:30
[10] => 2013-01-27|Making movies|Laurel|02:30
[11] => 2013-01-27|Learning PHP|Hardy|07:30
[12] => 2013-01-27|Making movies|Keaton|07:30
[13] => 2013-01-27|Making movies|Lloyd|07:30
)
I'd like to create a filter that lists the tasks and sums the time values of each task, for example:
Learning PHP (<-selected option)
2013-01-29 Hardy 07:00
2013-01-28 Laurel 07:30
2013-01-28 Keaton 07:30
2013-01-27 Laurel 05:30
2013-01-27 Hardy 07:30
=======================
TOTAL 35:00
What would be the way to make this happen?
Any suggestions or next steps are more than welcome.

Answer 1

This would be easier to filter if you had a multidimensional array. Something like this would work for the current structure though:
$task = "Learning PHP";
foreach($arr as $k=>$v) {
$pieces = explode("|", $v);
if($pieces[1]==$task) {
$total += (int) str_replace(':','',$pieces[3]);
echo $pieces[0] . " " . $pieces[2] . " " . $pieces[3];
}
}
echo "Total: " . $total;