例如，WP\\u查询仅用于获取标准post数据。不会提取WC等插件的其他数据。

要执行自定义查询，如果要使用自定义查询，可以使用WC_Product_Query

在theme的函数中放置以下内容。php并将javascript保存到单独的php文件中。快速测试使用WC默认样本产品。

// in theme\'s functions.php
// before init, no products is prepared if just direct call in functions.php, so to have quick test, need to place inside a init
add_action( \'init\', \'ws365398_simple_test\' );
function ws365398_simple_test() {
    add_action(\'wp_enqueue_scripts\', \'ws365398_enqueue_scripts\', 101);

    add_action( \'wp_ajax_my_action\', \'get_products\' );
    add_action( \'wp_ajax_nopriv_my_action\', \'get_products\' );
}

// actions for ajax
function get_products()
{
    if( !empty( $_POST[\'category\'] ) ) {
        $cat_id = $_POST[\'category\'];
    } else {
        $cat_id = 19; // default change to yours, in the test case ensure it have something by default
    }

    $args = array(
        \'status\'           => \'publish\',
        \'ignore_sticky_posts\'   => 1,
        \'posts_per_page\'        => \'12\',
        \'tax_query\'             => array(
            \'relation\'          => \'AND\', // relation of 2 taxonomy queries
            array(
                \'taxonomy\'      => \'product_cat\',
                \'field\'         => \'term_id\', //This is optional, as it defaults to \'term_id\'
                \'terms\'         => $cat_id,
                \'operator\'      => \'IN\' // Possible values are \'IN\', \'NOT IN\', \'AND\'.
            ),
            array(
                \'taxonomy\'      => \'product_visibility\',
                \'field\'         => \'slug\',
                \'terms\'         => \'exclude-from-catalog\', // Possibly \'exclude-from-search\' too
                \'operator\'      => \'NOT IN\'
            )
        )
    );
    $query = new WC_Product_Query($args);
    $products = $query->get_products();

    // convert to array data before pushing to json
    $product_arr = [];
    foreach ($products as $key => $product) {
        $product_arr[] = $product->get_data();
    }

    // echo json_encode($product_arr);
    wp_send_json_success( $product_arr ); // with success flag and use directly

    wp_die();
}

// enqueue ajax script
function ws365398_enqueue_scripts()
{
    wp_enqueue_script(\'test-custom-scripts\', get_theme_file_uri(\'ws365398-test-ajax.php\'), array(), \'t\' . time(), true);
}

<?php

// ws365398-test-ajax.php
/** Load WordPress Bootstrap */
// change to your path
require_once( \'/project/wp-load.php\' );

header("Content-type: text/javascript");?>

function test_ajax() {
    let myData = {
      action: \'my_action\',
    };

    jQuery.post(\'<?php echo admin_url( \'admin-ajax.php\' );?>\', myData, function (response) {

      if (response.success == true) {
        console.log(response);
        }
    });
}

要进行测试，只需为您的环境准备具有正确路径的上述文件。跑test_ajax() 在浏览器检查器中，您将看到如下内容：