Online PHP editor | output for bT2bZ

<?php $staff = array(1,2,3,4,5,6,7,8,9,10); $start = array("11:00", "13:00", "17:00", "17:00", "11:00", "13:30", "16:50", "18:30","17:00", "11:00"); $end = array("21:00", "15:00", "19:00", "19:30", "11:30", "15:10", "18:45", "19:45", "19:00", "11:30"); // Add staff number to end of time ex 11:00 => 11:00#2 For($i=0; $i<count($start);$i++){ $start[$i] .= "#" . $staff[$i]; $end[$i] .= "#" . $staff[$i]; } $t = array_merge($start,$end); // create one long array with all in and out times sort($t); //var_dump($t); // Multisport is needed to get all arrays in time order as reference array_multisort($start, $end, $staff); // Find first start time (11:00) and slice array thwre, build string $test = implode(PHP_EOL,array_slice($t, array_search($start[0], $t))); // Find the times before first start (night end times) and add them last in string $test .= PHP_EOL . implode(PHP_EOL,array_slice($t, 0,array_search($start[0], $t))); $times = explode(PHP_EOL, $test); // explode to make it array again // Var_dump($times); $WhoIsInDaHouse = array("dummy"); // add a dummy variable since 0=false in later if $j=0; for($i=0; $i<count($times);$i++){ //echo $times[$i] ." " . $i ."\n"; if($times[$i]){ $TimePerson = explode("#", $times[$i]); $Time = $TimePerson[0]; $person = $TimePerson[1]; $inout = array_search($person, $WhoIsInDaHouse); //is person in house and about to leave? If($inout != false){ //if person enter work false, if true: key of person leaving in $WhoIsInDaHouse //Here $person is leaving work Unset($WhoIsInDaHouse[$inout]); If(count($WhoIsInDaHouse) == 2){ // someone will now be alone since we have a dummy $Alone[$j]["start"] = $Time; $Alone[$j]["who"] = array_slice($WhoIsInDaHouse, -1)[0]; }elseif(count($WhoIsInDaHouse) == 1 && $prevcount == 2){ // Only dummy left $Alone[$j]["end"] = $Time; $Alone[$j]["duration"] = strtotime($Alone[$j]["end"])-strtotime($Alone[$j]["start"]); $j++; } }Else{ // Here person enters work $WhoIsInDaHouse[] = $person; If(count($WhoIsInDaHouse) == 2){ // someone is entering alone $Alone[$j]["start"] = $Time; $Alone[$j]["who"] = $person; }elseif(count($WhoIsInDaHouse)>2 && $prevcount == 2){ // not alone anymore $Alone[$j]["end"] = $Time; $Alone[$j]["duration"] = strtotime($Alone[$j]["end"])-strtotime($Alone[$j]["start"]); $j++; } } $prevcount = count($WhoIsInDaHouse); } } foreach($Alone as $key => &$loner){ if($loner["duration"]==0) unset($Alone[$key]); } Var_dump($Alone);