当在functions.php文件中调用WordPress时，WordPress无法从数据库获取值

我试图遍历我的自定义查询, 并根据从该查询获得的结果制作一个新数组, 但是当我运行时它返回null

新的WP_Query($ args)

尝试了很多调试, 不知道是什么原因导致了这个问题, 这是到目前为止我的想法

function getProductbySize(){
$category = $_REQUEST['category'];
$size = $_REQUEST['sized'];
$user_id = get_current_user_id();

$args = array(
            'post_type'             => 'product', 'post_status'           => 'publish', 'posts_per_page'        => '-1', 'author'                => $user_id, 'tax_query'             => array(
                array(
                    'taxonomy'      => 'product_cat', 'field'         => 'term_id', 'terms'         => $category, 'operator'      => 'AND'
                ), array(
                    'taxonomy'      => 'Size', 'field'         => 'term_id', 'terms'         => $size, )
            )
        );
        $products = new WP_Query($args);

        // var_dump($products);
        $data_array = [];
        $data = [];
        foreach($products as $product){
            $data_array[] = the_ID();
            $data_array[] = the_content();
            $data_array[] = the_permalink();

            $data[] = $data_array;
        }

        var_dump($data_array);
    }
    add_action('wp_ajax_getProductbySize', 'getProductbySize');
    add_action('wp_ajax_nopriv_getProductbySize', 'getProductbySize');

当我转储数据数组时, 它会显示如下内容

array(44){[0] => NULL [1] => NULL [2] => NULL [3] => NULL [4] => NULL [5] => NULL [6] => NULL [7] =>空[8] =>空[9] =>空[10] =>空[11] =>空[12] =>空[13] =>空[14] =>空[15] => NULL [16] => NULL [17] => NULL [18] => NULL [19] => NULL [20] => NULL [21] => NULL [22] => NULL [23] => NULL [ 24] => NULL [25] => NULL [26] => NULL [27] => NULL [28] => NULL [29] => NULL [30] => NULL [31] => NULL [32] =>空[33] =>空[34] =>空[35] =>空[36] =>空[37] =>空[38] =>空[39] =>空[40] => NULL [41] => NULL [42] => NULL [43] => NULL}

谁能帮我找出我在做错什么事, 谢谢你

#1

    <?php  


function getProductbySize(){
    $category = $_REQUEST['category'];
    $size = $_REQUEST['sized'];
    $user_id = get_current_user_id();

    $data_array = [];   // Get some random products.
        $args = array(
                'post_type'    => 'product', 'post_status'  => 'publish', 'author'       =>  $user_id, 'product_cat'  =>  $category, 'posts_per_page'  => '-1', 'tax_query'             => array( 
                    array(
                        'taxonomy'      => 'Size', 'field'         => 'term_id', 'terms'         => $size, )
                )


            );
        $loop = new WP_Query( $args );
        if ( $loop->have_posts() ) {
            while ( $loop->have_posts() ) : $loop->the_post();

                array_push($data_array, array(
                        'title' =>get_the_title(), 'content' =>get_the_content(), 'permalink' =>get_the_permalink()
                    ));

            endwhile;
        } 

        var_dump($data_array);
    }
    add_action('wp_ajax_getProductbySize', 'getProductbySize');
    add_action('wp_ajax_nopriv_getProductbySize', 'getProductbySize');
  ?>