How to remove duplicate from an Array and sort it? [duplicate]

if you have:

$a = array(2,3,2,1,3,2,0,3,2,0,11,7,9,2);

you can use array_unique() to remove duplicates:

$a = array_unique($a);

and then use asort() to sort the array values:

asort($a);

//Try this out...

$array = array(2,3,2,(1),3,2,(0),3,2,0,11,7,9,(2));
$array_u = array_unique($array);
sort($array_u);
print_r($array_u);

Sample output

Array
(
    [0] => 0
    [1] => 1
    [2] => 2
    [3] => 3
    [4] => 7
    [5] => 9
    [6] => 11
)

First step: flattern

function flatten(array $array) {
    $return = array();
    array_walk_recursive($array, function($a) use (&$return) { $return[] = $a; });
    return $return;
}

then using asort and array_unique you can remove duplicates and sort ascendent.

$result = array_unique(flattern($array));
asort($result);

Sources: How to Flatten a Multidimensional Array?