你知道为什么我的函数print\\r$arr有很多元素，但在print\\r$stack时只保留cat和dog吗？我需要在函数外部使用$arr，

function pre_selected_results() {
    $args = array(...)
    $the_query = new WP_Query($args);

    $arr = array("Dog","Cat");

    while ($the_query->have_posts()) : 
        $the_query->the_post();
        $args = array(...)
        $results = wp_get_post_terms(get_the_ID(),\'type\',$args);  
        foreach ($results as $result){
            $arr[] = $result;   
        } 
    endwhile;
    print_r ($arr);
    return $arr;
};//End of pre_get_results function
$stack = pre_selected_results();
print_r ($stack);

编辑：my$args以防有帮助：对于quey：

$args[\'tax_query\'] = array(
\'relation\' => \'OR\',
 array(
    \'taxonomy\' => \'category\',
    \'terms\' => $_GET[\'category\'],
    \'field\' => \'slug\',
),
array(
    \'taxonomy\' => \'genres\',
    \'terms\' => $_GET[\'genre\'],
    \'field\' => \'slug\',
),
array(
    \'taxonomy\' => \'types\',
    \'terms\' => $_GET[\'type\'],
    \'field\' => \'slug\',
),

对于wp\\u get\\u post\\u术语：

$args = array(\'orderby\' => \'name\', \'order\' => \'ASC\', \'fields\' => \'slugs\');