无法在wordpress中显示新的metabox

Question

我无法添加新的metabox。这是我的代码。metabox旨在添加到自定义帖子类型上，其名称为'claws‘。

代码的最后一行实际上出现在源代码中。即使到那时它也不会显示。非常不合逻辑。

add_action('add_meta_boxes', 'my_admin');
function my_admin() {
    add_meta_box('claws_link','Link','random_callback','claws','normal','high');
}

function random_callback($post) {
    $post_id = $post->ID;
    wp_nonce_field( plugin_basename( __FILE__ ), 'random_linknonce' );
    // The actual fields for data entry
    // Use get_post_meta to retrieve an existing value from the database and use the value for the form
    $value = get_post_meta( $_POST['post_ID'], $key = 'claws_link', $single = true );
    echo '<label for="claws_link">';
        _e("Enter link", 'random_textdomain' );
    echo '</label> ';
    echo '<input type="text" id="claws_link" name="claws_link" value = "'.$value.'" size="25" />';    //this html code actually comes in the source, still no metabox, dunno why
}

Answer 1

尝尝这个

add_action('do_meta_boxes', function() {
    add_meta_box('claws_link','Link','random_callback','claws','normal','high');
});

或者如果你不在php 5.3+上

add_action('do_meta_boxes', 'my_meta_boxes');

function my_meta_boxes() {
    add_meta_box('claws_link','Link','random_callback','claws','normal','high');
}