sorting array value without using built in php like sort() etc

Answer 1

    $arr= array(110,20,130,100,2);

    for($i=0; $i $arr[$j+1]){
                $temp= $arr[$j+1];
                $arr[$j+1]= $arr[$j];
                $arr[$j]= $temp;
            }
        }

    }
    print_r($arr);