How to register metabox in wordpress?

Question

metadata

Greetings! I created a new taxonomy in the wordpress admin panel and I want to add a new field with metadata to it. I'm doing it by analogy with the lambda theme , but I can't figure out why the field is not initialized. Code of the child theme 's functions.php file

class OxygennaTheme
{
    public $metaboxes = array();
      public function register_metabox($metabox)
    {
        $this->metaboxes[] = $metabox;
    }
}
$oxy_theme = new OxygennaTheme();
$oxy_theme->register_metabox(array(
    'id' => 'portfolio_masonry_metabox',
    'title' => __('Portfolio Masonry Options', 'lambda-admin-td'),
    'priority' => 'default',
    'context' => 'advanced',
    'pages' => array('oxy_portfolio_image'),
    'fields' => array(
        array(
            'name'    => __('Masonry Image Width ', 'lambda-admin-td'),
            'desc'    => __('Select the width that the masonry portfolio shortcode will use for this item (normal 1 column wide 2 columns)', 'lambda-admin-td'),
            'id'      => 'masonry_width',
            'type'    => 'select',
            'options' => array(
                'normal'    => __('Normal', 'lambda-admin-td'),
                'wide'   => __('Wide', 'lambda-admin-td'),
            ),
            'default' => 'normal',
        ),
    )
));

Answer 1

It looks like you have some kind of plugin that should read this code, see the documentation for it