bubblesort (A)
for i = 1 to A.length - 1
for j = A.length downto i + 1
if A[j] < A[j - 1]
exchange A[j] with A[j - 1]

<?php
 function bubble_sort($A) {
    $c = count($A)-1;
    for ($i=0; $i<$c; $i++) {
        for ($j=0; $j<$c-$i; $j++) {
            $k = $j+1;
            if $A[$j] < $A[$j - 1] {

            }
        }
echo json_encode($A);
}