WPUI

NULL
array(1) {
  ["one"]=>
  string(4) "Left"
}
bool(false)
array(3) {
  [0]=>
  array(2) {
    ["value"]=>
    string(3) "One"
    ["label"]=>
    string(3) "One"
  }
  [1]=>
  array(2) {
    ["value"]=>
    string(3) "Two"
    ["label"]=>
    string(3) "Two"
  }
  [2]=>
  array(2) {
    ["value"]=>
    string(5) "Three"
    ["label"]=>
    string(5) "Three"
  }
}
int(5)
string(7) "#00fdff"
NULL
array(1) {
  ["one"]=>
  string(4) "Left"
}
bool(false)
array(3) {
  [0]=>
  array(2) {
    ["value"]=>
    string(3) "One"
    ["label"]=>
    string(3) "One"
  }
  [1]=>
  array(2) {
    ["value"]=>
    string(3) "Two"
    ["label"]=>
    string(3) "Two"
  }
  [2]=>
  array(2) {
    ["value"]=>
    string(5) "Three"
    ["label"]=>
    string(5) "Three"
  }
}
int(5)
string(7) "#00f900"