我想将一个自定义元框添加到特定的自定义元类型“chifres”，将两个自定义元框添加到特定的自定义元类型“presse”。这就是我取得的成绩：

这是我的代码：

//Add custom metadata
function add_custom_metadata_boxes() {
        add_meta_box(
        \'custom_meta_box\', // $id
        \'Values\', // $title
        \'show_custom_boxes\', // $callback
        \'foo1\', //Custom post types
        \'normal\', // $context
        \'high\' // $priority
    );
}

$prefix = \'custom_\';
$custom_meta_fields = array(
    array(
            \'name\' => \'number\',
            \'label\' => \'Number\',
            \'id\' => $prefix . \'number\',
            \'type\' => \'number\',
            \'std\' => \'\'
    )
);

// The Callback for the first one
function show_custom_boxes() {
global $custom_meta_fields, $post;
// Use nonce for verification
echo \'<input type="hidden" name="custom_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';

    // Begin the field table and loop
    echo \'<table class="form-table">\';
    foreach ($custom_meta_fields as $field) {
        // get value of this field if it exists for this post
        $meta = get_post_meta($post->ID, $field[\'id\'], true);
        // begin a table row with
        echo \'<tr>
               <th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
               <td>\';
                switch($field[\'type\']) {
                    // checkbox
                                        case \'number\':
                                echo \'<input type="number" min="0" step="1" pattern="\\d+" placeholder="Fill in a number" name="\', $field[\'id\'], \'" id="\', $field[\'id\'], \'" value="\', $meta ? $meta : $field[\'std\'], \'" size="30" style="width:97%" />\', \'<br />\', $field[\'desc\'];
                        break;
                } //end switch
        echo \'</td></tr>\';
    } // end foreach
    echo \'</table>\'; // end table
}

add_action(\'add_meta_boxes\', \'add_custom_metadata_boxes\');

function save_custom_meta($post_id) {
    global $custom_meta_fields;

    // verify nonce
    if (!wp_verify_nonce($_POST[\'custom_meta_box_nonce\'], basename(__FILE__)))
        return $post_id;
    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if (\'page\' == $_POST[\'post_type\']) {
        if (!current_user_can(\'edit_page\', $post_id))
            return $post_id;
        } elseif (!current_user_can(\'edit_post\', $post_id)) {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($custom_meta_fields as $field) {
        $old = get_post_meta($post_id, $field[\'id\'], true);
        $new = $_POST[$field[\'id\']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field[\'id\'], $new);
        } elseif (\'\' == $new && $old) {
            delete_post_meta($post_id, $field[\'id\'], $old);
        }
    } // end foreach
}
add_action(\'save_post\', \'save_custom_meta\');

“chifres”框工作得很好，我只是不知道如何将其他自定义元框添加到另一个自定义帖子类型。

有什么建议吗？

$post_type
(string) (required) The type of Write screen on which to show the edit screen section (\'post\', \'page\', \'dashboard\', \'link\', \'attachment\' or \'custom_post_type\' where custom_post_type is the custom post type slug)

is_singular(\'your-cpt\')

is_post_type_archive(\'your-cpt\')

Replace add_custom_metadata_boxes() to following:-

    //Add custom metadata
    function add_custom_metadata_boxes() {
          $screens = array( \'foo1\' );//Here add custom post type value
        foreach ( $screens as $screen ) {
    if($screen == \'foo1\'){
                add_meta_box(
                \'custom_meta_box\', // $id
                \'Values\', // $title
                \'show_custom_boxes\', // $callback
               $screen, //Custom post types
                \'normal\', // $context
                \'high\' // $priority
            );

    }else{
//add another meta box
}
    }