检查PHP数组中的重复元素(如果不是空的)

function has_duplicates($array) {
    return count($array) !== count(array_unique($array));
}

function has_duplicates($array) {
    $element_counts = array_count_values($array);
    foreach ($element_counts as $count) {
        if ($count > 1) {
            return true;
        }
    }
    return false;
}

function has_duplicates($array) {
    foreach ($array as $element) {
        if (in_array($element, $array) && $element !== '') {
            return true;
        }
    }
    return false;
}