Uncault Error: Cannot use WP_Post object as array
I was trying to put a WordPress menu inside my template file. I was not comfortable using wp_nav_menu as it outputs markup that is not compatible with my static HTML template. I know I could just use a custom menu crawler class to change the wp_nav_menu markup. But instead, I wanted to just use just the menu name and the corresponding URL and put it in my template. To do this, I used this function to get an array of all the attributes / properties of the menu.
Here is the code that was generated by this function ...
I found this using var_dump (). 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] =
)
)
My intention is to get the 'post_title' and 'url' values
How can i do this?
I am currently struggling with these lines of code
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
<a href="<?php $menu_object->url; ?>" class="active"><?php $menu_object->post_title; ?></a>
</li>
<?php endforeach; ?>
<?php endif; ?>
</ul>
</nav>
This generates this error:
Fatal error: Uncaught Error: Unable to use object of type WP_Post as array in D: \ xampp \ htdocs \ mySite \ wp-content \ themes \ mySite \ header.php: 98
I'm going to post this answer here for reference ...
Using a loop foreach
foreach ($originalArray as $key => $data) {
$post_date = $data->post_date; // 2017-07-10 11:50:32
}
To access data within an object, use ->
.
Example: from $data['post_date']
to$data->post_date
You retrieve an object, you can convert it to an array like this:
function object_to_array($obj) {
if(is_object($obj)) $obj = (array) $obj;
if(is_array($obj)) {
$new = array();
foreach($obj as $key => $val) {
$new[$key] = object_to_array($val);
}
}
else $new = $obj;
return $new;
}