You’d have to do this manually using a loop. Something like this should work:
$result = array();
foreach( $input as $row) {
$id = array_shift( $row);
foreach( $row as $key => $value) {
$result[ $id ][ $key ] =
( isset( $result[ $id ][ $key ]) ?
$result[ $id ][ $key ] + $value :
$value
);
}
}
Output:
array(2) {
[111]=>
array(2) {
[0]=>
int(10)
[1]=>
int(11)
}
[222]=>
array(2) {
[0]=>
int(5)
[1]=>
int(3)
}
}