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

Answer 1

We can use a Bubble Sort for sorting.

The best-case performance of O(n). Otherwise, best-case == worse-case == average-case == O(n^2)

$Obj1 = array(20, 30, 10, 50, 40, 60, 100, 90, 80, 70);

 $temp;

print_r($Obj1);


for ($i = 0; $i < sizeof($Obj1) - 1; $i++) {

for ($j = sizeof($Obj1) - 1; $j > $i; $j--) {
    if ($Obj1[$j - 1] > $Obj1[$j]) {
        $temp = $Obj1[$j-1];
        $Obj1[$j-1] = $Obj1[$j];
        $Obj1[$j] = $temp;
        $temp = 0;
    }
}

}

print_r($Obj1);