Answers for "php array keep only unique values"

array_unique

<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

remove duplicate value from array

let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);