alexFXIII

<?php
$array = array(1, "hello", 1, "world", "hello");
$counter = array_count_values($array);
arsort($counter);

print_r(array_slice($counter,0,20));
?>

Array
(
    [1] => 2
    [hello] => 2
    [world] => 1
)

uasort($data, function($a, $b) {
 return $a['theme']==0 || $b['theme']==0 ? -1 : 0;
});