Bubble sort ( php )

<?php
  
$unsort = [1,5,2,22,12,39,3];

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

var_dump($unsort);