关于php：未捕获的错误：无法将WP_Post类型的对象用作数组

Uncaught Error: Cannot use object of type WP_Post as array

我试图将WordPress菜单放在模板文件中。我发现使用wp_nav_menu很不舒服，因为它输出的标记与我的静态HTML模板不兼容。我知道我可以使用自定义菜单浏览器类来修改wp_nav_menu的标记。但是，我只想使用菜单名称及其相应的url并将其放置在我的模板中。为此，我使用此函数获取菜单的所有属性/属性的数组。这是此函数生成的代码...
我通过使用var_dump()找到了它。

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Array
(
[0] = WP_Post Object
(
[ID] = 20
[post_author] = 1
[post_date] = 2017-07-10 11:50:32
[post_date_gmt] = 2017-07-10 10:50:32
[post_content] =
[post_title] = About
[post_excerpt] =
[post_status] = publish
[comment_status] = closed
[ping_status] = closed
[post_password] =
[post_name] = about
[to_ping] =
[pinged] =
[post_modified] = 2017-07-10 11:50:40
[post_modified_gmt] = 2017-07-10 10:50:40
[post_content_filtered] =
[post_parent] = 0
[guid] = http://localhost/mySite/?p=20
[menu_order] = 1
[post_type] = nav_menu_item
[post_mime_type] =
[comment_count] = 0
[filter] = raw
[db_id] = 20
[menu_item_parent] = 0
[object_id] = 20
[object] = custom
[type] = custom
[type_label] = Custom Link
[title] = About
[url] = #
[target] =
[attr_title] =
[description] =
[classes] = Array
(
[0] =
)

[xfn] =
)

[1] = WP_Post Object
(
[ID] = 21
[post_author] = 1
[post_date] = 2017-07-10 11:50:32
[post_date_gmt] = 2017-07-10 10:50:32
[post_content] =
[post_title] = Things I Can Do
[post_excerpt] =
[post_status] = publish
[comment_status] = closed
[ping_status] = closed
[post_password] =
[post_name] = things-i-can-do
[to_ping] =
[pinged] =
[post_modified] = 2017-07-10 11:50:40
[post_modified_gmt] = 2017-07-10 10:50:40
[post_content_filtered] =
[post_parent] = 0
[guid] = http://localhost/mySite/?p=21
[menu_order] = 2
[post_type] = nav_menu_item
[post_mime_type] =
[comment_count] = 0
[filter] = raw
[db_id] = 21
[menu_item_parent] = 0
[object_id] = 21
[object] = custom
[type] = custom
[type_label] = Custom Link
[title] = Things I Can Do
[url] = #
[target] =
[attr_title] =
[description] =
[classes] = Array
(
[0] =
)

[xfn] =
)

[2] = WP_Post Object
(
[ID] = 22
[post_author] = 1
[post_date] = 2017-07-10 11:50:32
[post_date_gmt] = 2017-07-10 10:50:32
[post_content] =
[post_title] = A Few Accomplishments
[post_excerpt] =
[post_status] = publish
[comment_status] = closed
[ping_status] = closed
[post_password] =
[post_name] = a-few-accomplishments
[to_ping] =
[pinged] =
[post_modified] = 2017-07-10 11:50:40
[post_modified_gmt] = 2017-07-10 10:50:40
[post_content_filtered] =
[post_parent] = 0
[guid] = http://localhost/mySite/?p=22
[menu_order] = 3
[post_type] = nav_menu_item
[post_mime_type] =
[comment_count] = 0
[filter] = raw
[db_id] = 22
[menu_item_parent] = 0
[object_id] = 22
[object] = custom
[type] = custom
[type_label] = Custom Link
[title] = A Few Accomplishments
[url] = #
[target] =
[attr_title] =
[description] =
[classes] = Array
(
[0] =
)

[xfn] =
)

[3] = WP_Post Object
(
[ID] = 23
[post_author] = 1
[post_date] = 2017-07-10 11:50:32
[post_date_gmt] = 2017-07-10 10:50:32
[post_content] =
[post_title] = Contact
[post_excerpt] =
[post_status] = publish
[comment_status] = closed
[ping_status] = closed
[post_password] =
[post_name] = contact
[to_ping] =
[pinged] =
[post_modified] = 2017-07-10 11:50:40
[post_modified_gmt] = 2017-07-10 10:50:40
[post_content_filtered] =
[post_parent] = 0
[guid] = http://localhost/mySite/?p=23
[menu_order] = 4
[post_type] = nav_menu_item
[post_mime_type] =
[comment_count] = 0
[filter] = raw
[db_id] = 23
[menu_item_parent] = 0
[object_id] = 23
[object] = custom
[type] = custom
[type_label] = Custom Link
[title] = Contact
[url] = #
[target] =
[attr_title] =
[description] =
[classes] = Array
(
[0] =
)

[xfn] =
)

)

我的意图是获取" post_title"和" url"的值

我怎样才能做到这一点？

我目前正在努力处理这些代码行

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function mt_get_menu_items($menu_name) {
if ( ( $locations = get_nav_menu_locations() ) && isset( $locations[ $menu_name ] ) ) {
$menu = wp_get_nav_menu_object( $locations[ $menu_name ] );
return wp_get_nav_menu_items($menu->term_id);
}
}
$menu_items = mt_get_menu_items ('main_menu');
<nav id="nav">

<ul>

<?php if (isset ($menu_items) ) : ?>
<?php foreach ( (array) $menu_items as $key => $menu_item ) : ?>
<?php // $menu_item_array = get_object_vars($menu_item[$key]);
$menu_object = $menu_item[$key];
// this line is 98
?>

<li>

// this line is 101
url; ?>" class="active"><?php $menu_object->post_title; ?>

</li>

<?php endforeach; ?>
<?php endif; ?>

</ul>

</nav>

这将产生此错误：

Fatal error: Uncaught Error: Cannot use object of type WP_Post as array in D:\xampp\htdocs\mySite\wp-content\themes\mySite\header.php:98