这是我用来在自定义帖子类型中添加自定义字段的代码示例。
或者您可以使用插件Advanced Custom Field 添加自定义字段并将它们附加到您的自定义帖子类型。
希望对你有帮助！
<?php
// Metabox declaration
$prefix = 'bookmark_';
// The only way I found too pass the fields informations to the action
global $bookmark_meta_fields;
$bookmark_meta_fields = array(
array(
'label'=> 'Url',
'desc' => 'Url of the bookmark.',
'id' => $prefix.'url',
'type' => 'text'
),
array(
'label'=> 'Comments',
'desc' => 'A small comments about the bookmarks.',
'id' => $prefix.'comment',
'type' => 'textarea'
),
);
add_action('add_meta_boxes', 'vban_bookmark_metabox');
function vban_bookmark_metabox() {
add_meta_box(
'bookmark_info', // $id
'Bookmark info', // $title
'vban_bookmark_metabox_show', // $callback
'vbanBookmarks', // $page
'normal', // $context
'high'); // $priority
}
/*
* show metabox function
*/
function vban_bookmark_metabox_show() {
global $bookmark_meta_fields, $post;
// Use nonce for verification
echo '<input type="hidden" name="custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';
// Begin the field table and loop
echo '<table class="form-table">';
foreach ($bookmark_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']) {
case 'text':
echo '<input type="text" name="'.$field['id'].'" id="'.$field['id'].'" value="'.$meta.'" size="30" />
<br /><span class="description">'.$field['desc'].'</span>';
// textarea
break;
case 'textarea':
echo '<textarea name="'.$field['id'].'" id="'.$field['id'].'" cols="60" rows="4">'.$meta.'</textarea>
<br /><span class="description">'.$field['desc'].'</span>';
break;
} //end switch
echo '</td></tr>';
} // end foreach
echo '</table>'; // end table
}
/*
* SAVE metabox custom_field
*/
add_action('save_post', 'vban_bookmark_metabox_save');
// Save the Data
function vban_bookmark_metabox_save($post_id) {
global $bookmark_meta_fields;
// verify nonce
if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__))) {
return $post_id;
}
// check autosave
if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE){
return $post_id;
}
// check permissions
if ('vbanBookmarks' == $_POST['post_type']) {
if (!current_user_can('edit_bookmark', $post_id))
return $post_id;
} elseif (!current_user_can('edit_post', $post_id)) {
return $post_id;
}
// loop through fields and save the data
foreach ($bookmark_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
}
?>