Implement bubble sorting (from small to large) using PHP

 //Array element values ​​are sorted from small to large
 $arr=array(1,42,0,3,15,7,19,26);
 //Define an intermediate variable
 $ temp=0;
 //Number of outer loops
 for($i=0;$i //Two arrays adjacent to the right between the inner layers Compare the element values
 for($j=0;$j //When the value of the next array element is greater than the original value of the previous array
 if($arr [$j]>$arr[$j+1]){
 //Array element exchange
 $temp=$arr[$j];
 $arr[$j]=$arr[$j+1];
 $arr[$j+1]=$temp;
 }
 }
 //The number of times the outer array loop is ---count($arr)-1
 //The reason for -1 (array element value comparison It is two comparisons
 //For example, three array elements are compared twice
 echo "This is the result of the ".($i+1)."th comparison";
 echo "";
 print_r($arr);
 echo "";
 }
 echo "";
 echo "";
 print_r($arr) ;
 echo "";
?>

PHP