";
return $r;
}
/**
* Prints the form in the Custom Fields meta box.
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param WP_Post $post Optional. The post being edited.
*/
function meta_form( $post = null ) {
global $wpdb;
$post = get_post( $post );
/**
* Filter values for the meta key dropdown in the Custom Fields meta box.
*
* Returning a non-null value will effectively short-circuit and avoid a
* potentially expensive query against postmeta.
*
* @since 4.4.0
*
* @param array|null $keys Pre-defined meta keys to be used in place of a postmeta query. Default null.
* @param WP_Post $post The current post object.
*/
$keys = apply_filters( 'postmeta_form_keys', null, $post );
if ( null === $keys ) {
/**
* Filter the number of custom fields to retrieve for the drop-down
* in the Custom Fields meta box.
*
* @since 2.1.0
*
* @param int $limit Number of custom fields to retrieve. Default 30.
*/
$limit = apply_filters( 'postmeta_form_limit', 30 );
$sql = "SELECT DISTINCT meta_key
FROM $wpdb->postmeta
WHERE meta_key NOT BETWEEN '_' AND '_z'
HAVING meta_key NOT LIKE %s
ORDER BY meta_key
LIMIT %d";
$keys = $wpdb->get_col( $wpdb->prepare( $sql, $wpdb->esc_like( '_' ) . '%', $limit ) );
}
if ( $keys ) {
natcasesort( $keys );
$meta_key_input_id = 'metakeyselect';
} else {
$meta_key_input_id = 'metakeyinput';
}
?>
";
return $i;
}
/**
* Removes a meta box from one or more screens.
*
* @since 2.6.0
* @since 4.4.0 The `$screen` parameter now accepts an array of screen IDs.
*
* @global array $wp_meta_boxes
*
* @param string $id Meta box ID (used in the 'id' attribute for the meta box).
* @param string|array|WP_Screen $screen The screen or screens on which the meta box is shown (such as a
* post type, 'link', or 'comment'). Accepts a single screen ID,
* WP_Screen object, or array of screen IDs.
* @param string $context Optional. The context within the screen where the boxes
* should display. Available contexts vary from screen to
* screen. Post edit screen contexts include 'normal', 'side',
* and 'advanced'. Comments screen contexts include 'normal'
* and 'side'. Menus meta boxes (accordion sections) all use
* the 'side' context. Global default is 'advanced'.
*/
function remove_meta_box( $id, $screen, $context ) {
global $wp_meta_boxes;
if ( empty( $screen ) ) {
$screen = get_current_screen();
} elseif ( is_string( $screen ) ) {
$screen = convert_to_screen( $screen );
} elseif ( is_array( $screen ) ) {
foreach ( $screen as $single_screen ) {
remove_meta_box( $id, $single_screen, $context );
}
}
if ( ! isset( $screen->id ) ) {
return;
}
$page = $screen->id;
if ( !isset($wp_meta_boxes) )
$wp_meta_boxes = array();
if ( !isset($wp_meta_boxes[$page]) )
$wp_meta_boxes[$page] = array();
if ( !isset($wp_meta_boxes[$page][$context]) )
$wp_meta_boxes[$page][$context] = array();
foreach ( array('high', 'core', 'default', 'low') as $priority )
$wp_meta_boxes[$page][$context][$priority][$id] = false;
}
/**
* Meta Box Accordion Template Function
*
* Largely made up of abstracted code from {@link do_meta_boxes()}, this
* function serves to build meta boxes as list items for display as
* a collapsible accordion.
*
* @since 3.6.0
*
* @uses global $wp_meta_boxes Used to retrieve registered meta boxes.
*
* @param string|object $screen The screen identifier.
* @param string $context The meta box context.
* @param mixed $object gets passed to the section callback function as first parameter.
* @return int number of meta boxes as accordion sections.
*/
function do_accordion_sections( $screen, $context, $object ) {
global $wp_meta_boxes;
wp_enqueue_script( 'accordion' );
if ( empty( $screen ) )
$screen = get_current_screen();
elseif ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
$page = $screen->id;
$hidden = get_hidden_meta_boxes( $screen );
?>
$id, 'title' => $title, 'callback' => $callback);
}
/**
* Add a new field to a section of a settings page
*
* Part of the Settings API. Use this to define a settings field that will show
* as part of a settings section inside a settings page. The fields are shown using
* do_settings_fields() in do_settings-sections()
*
* The $callback argument should be the name of a function that echoes out the
* html input tags for this setting field. Use get_option() to retrieve existing
* values to show.
*
* @since 2.7.0
* @since 4.2.0 The `$class` argument was added.
*
* @global $wp_settings_fields Storage array of settings fields and info about their pages/sections
*
* @param string $id Slug-name to identify the field. Used in the 'id' attribute of tags.
* @param string $title Formatted title of the field. Shown as the label for the field
* during output.
* @param callable $callback Function that fills the field with the desired form inputs. The
* function should echo its output.
* @param string $page The slug-name of the settings page on which to show the section
* (general, reading, writing, ...).
* @param string $section Optional. The slug-name of the section of the settings page
* in which to show the box. Default 'default'.
* @param array $args {
* Optional. Extra arguments used when outputting the field.
*
* @type string $label_for When supplied, the setting title will be wrapped
* in a `