Remove dupilcate items from Subarray PHP - php

Question

I am wondering if anyone can advise on how to remove duplicate items from just the subarray.
From the example below index 0 has blue and red, and index 2 has blue yellow blue. I want the duplicates to be removed at the index level so the output of index 0 should remain blue red and the output of index 2 should be blue yellow.
I have used a few methods but all the attempts I have made do not remove at the sub-array level.
Array
(
[0] => Array
(
[0] => blue
[1] => red
)
[1] => Array
(
[0] => green
[1] => brown
)
[2] => Array
(
[0] => blue
[1] => yellow
[2] => blue
)
)
Should return as:
Array
(
[0] => Array
(
[0] => blue
[1] => red
)
[1] => Array
(
[0] => green
[1] => brown
)
[2] => Array
(
[0] => blue
[1] => yellow
)
)
Thank You

Answer 1

You can use array_unique()` for this:
$array = [
['blue', 'red'],
['green', 'brown'],
['blue', 'yellow', 'blue']
];
$new_array = [];
foreach ( $array as $single ) {
$new_array[] = array_unique( $single );
}
$new_array will print_r to this:
(
[0] => Array
(
[0] => blue
[1] => red
)
[1] => Array
(
[0] => green
[1] => brown
)
[2] => Array
(
[0] => blue
[1] => yellow
)
)