phparraysarray-unique

PHP - array_unique not changing output

I have an array $tmp:

$a = array(0 => 49, 1 => 49, 2 => 49);

after using array_unique($tmp) I'm getting this output: 

Array
(
    [0] => 49
    [1] => 49
    [2] => 49
)

and I want to get 

Array
(
    [0] => 49
)

What am I doing wrong? Im new in PHP

Solution 
  • $input = array(49,49,49);

$result = array_unique($input);

print_r($result);