Um ein vollständiges Codebeispiel basierend auf Andrews Antwort bereitzustellen ... Ich brauchte eine Möglichkeit, meinen Posts ein "Deck" (auch bekannt als Subhead) hinzuzufügen. Ich wollte, dass das Deck-Feld nach der Haupttitelleiste erscheint.
/**
* Add a "deck" (aka subhead) meta box to post page(s) and position it
* under the title.
*
* @todo Move to class.
* @see http://codex.wordpress.org/Function_Reference/add_meta_box
* @see http://wordpress.org/extend/ideas/topic/add-meta-box-to-multiple-post-types
* @see https://github.com/Horttcore/WordPress-Subtitle
* @see http://codex.wordpress.org/Function_Reference/wp_nonce_field
*/
# Adds a box to the main column on the Post and Page edit screens:
function foo_deck($post_type) {
# Allowed post types to show meta box:
$post_types = array('post', 'page');
if (in_array($post_type, $post_types)) {
# Add a meta box to the administrative interface:
add_meta_box(
'foo-deck-meta-box', // HTML 'id' attribute of the edit screen section.
'Deck', // Title of the edit screen section, visible to user.
'foo_deck_meta_box', // Function that prints out the HTML for the edit screen section.
$post_type, // The type of Write screen on which to show the edit screen section.
'advanced', // The part of the page where the edit screen section should be shown.
'high' // The priority within the context where the boxes should show.
);
}
}
# Callback that prints the box content:
function foo_deck_meta_box($post) {
# Use `get_post_meta()` to retrieve an existing value from the database and use the value for the form:
$deck = get_post_meta($post->ID, '_deck', true);
# Form field to display:
?>
<label class="screen-reader-text" for="foo_deck">Deck</label>
<input id="foo_deck" type="text" autocomplete="off" value="<?=esc_attr($deck)?>" name="foo_deck" placeholder="Deck">
<?php
# Display the nonce hidden form field:
wp_nonce_field(
plugin_basename(__FILE__), // Action name.
'foo_deck_meta_box' // Nonce name.
);
}
/**
* @see https://wordpress.stackexchange.com/a/16267/32387
*/
# Save our custom data when the post is saved:
function foo_deck_save_postdata($post_id) {
# Is the current user is authorised to do this action?
if ((($_POST['post_type'] === 'page') && current_user_can('edit_page', $post_id) || current_user_can('edit_post', $post_id))) { // If it's a page, OR, if it's a post, can the user edit it?
# Stop WP from clearing custom fields on autosave:
if ((( ! defined('DOING_AUTOSAVE')) || ( ! DOING_AUTOSAVE)) && (( ! defined('DOING_AJAX')) || ( ! DOING_AJAX))) {
# Nonce verification:
if (wp_verify_nonce($_POST['foo_deck_meta_box'], plugin_basename(__FILE__))) {
# Get the posted deck:
$deck = sanitize_text_field($_POST['foo_deck']);
# Add, update or delete?
if ($deck !== '') {
# Deck exists, so add OR update it:
add_post_meta($post_id, '_deck', $deck, true) OR update_post_meta($post_id, '_deck', $deck);
} else {
# Deck empty or removed:
delete_post_meta($post_id, '_deck');
}
}
}
}
}
# Get the deck:
function foo_get_deck($post_id = FALSE) {
$post_id = ($post_id) ? $post_id : get_the_ID();
return apply_filters('foo_the_deck', get_post_meta($post_id, '_deck', TRUE));
}
# Display deck (this will feel better when OOP):
function foo_the_deck() {
echo foo_get_deck(get_the_ID());
}
# Conditional checker:
function foo_has_subtitle($post_id = FALSE) {
if (foo_get_deck($post_id)) return TRUE;
}
# Define the custom box:
add_action('add_meta_boxes', 'foo_deck');
# Do something with the data entered:
add_action('save_post', 'foo_deck_save_postdata');
/**
* @see https://wordpress.stackexchange.com/questions/36600
* @see https://wordpress.stackexchange.com/questions/94530/
*/
# Now move advanced meta boxes after the title:
function foo_move_deck() {
# Get the globals:
global $post, $wp_meta_boxes;
# Output the "advanced" meta boxes:
do_meta_boxes(get_current_screen(), 'advanced', $post);
# Remove the initial "advanced" meta boxes:
unset($wp_meta_boxes['post']['advanced']);
}
add_action('edit_form_after_title', 'foo_move_deck');
Offensichtlich könnte der obige Code etwas mehr Arbeit gebrauchen, aber es sollte anderen helfen, die gleichen Dinge zu tun (Andrews Antwort schien hell, aber ich dachte, es könnte hilfreich sein, tatsächlich ein funktionierendes Beispiel zu liefern).
Diese Antwort hat auch geholfen .
Mögliche Verbesserungen:
- Machen Sie OOP / Klasse (n).
- Fügen Sie Stile / js hinzu, damit es wie das Titelfeld aussieht / sich anfühlt / verhält.
Ich plane, die obigen Verbesserungen zu einem späteren Zeitpunkt vorzunehmen, aber der obige Code sollte zumindest anderen helfen, dies herauszufinden.
Siehe Quelltext hier für mehr Inspiration (sie entschieden jQuery zu verwenden , um die „Untertitel“ zu bewegen).