How to find duplicate elements in an array : PHP Interview questions.

PHP Interview question on Array.

<?php

$arr = [12,32,32,12,33,3,33,33];

for($i = 0; $i < count($arr) - 1; $i++){
 for($k = $i + 1; $k < count($arr) - 1; $k++){
  if($arr[$i] == $arr[$k]){
   echo "Duplicate Value is :". $arr[$i]."<br>";
  }
 }
}

?>