+/**
+ * Add a meta box to an edit form.
+ *
+ * @since 2.5.0
+ *
+ * @param string $id String for use in the 'id' attribute of tags.
+ * @param string $title Title of the meta box.
+ * @param string $callback Function that fills the box with the desired content. The function should echo its output.
+ * @param string|object $screen Optional. The screen on which to show the box (post, page, link). Defaults to current screen.
+ * @param string $context Optional. The context within the page where the boxes should show ('normal', 'advanced').
+ * @param string $priority Optional. The priority within the context where the boxes should show ('high', 'low').
+ * @param array $callback_args Optional. Data that should be set as the "args" property of the box array (which is the second parameter passed to your callback).
+ */
+function add_meta_box( $id, $title, $callback, $screen = null, $context = 'advanced', $priority = 'default', $callback_args = null ) {
+ global $wp_meta_boxes;
+
+ if ( empty( $screen ) )
+ $screen = get_current_screen();
+ elseif ( is_string( $screen ) )
+ $screen = convert_to_screen( $screen );
+
+ $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][$context] = array();
+
+ foreach ( array_keys($wp_meta_boxes[$page]) as $a_context ) {
+ foreach ( array('high', 'core', 'default', 'low') as $a_priority ) {
+ if ( !isset($wp_meta_boxes[$page][$a_context][$a_priority][$id]) )
+ continue;
+
+ // If a core box was previously added or removed by a plugin, don't add.
+ if ( 'core' == $priority ) {
+ // If core box previously deleted, don't add
+ if ( false === $wp_meta_boxes[$page][$a_context][$a_priority][$id] )
+ return;
+ // If box was added with default priority, give it core priority to maintain sort order
+ if ( 'default' == $a_priority ) {
+ $wp_meta_boxes[$page][$a_context]['core'][$id] = $wp_meta_boxes[$page][$a_context]['default'][$id];
+ unset($wp_meta_boxes[$page][$a_context]['default'][$id]);
+ }
+ return;
+ }
+ // If no priority given and id already present, use existing priority
+ if ( empty($priority) ) {
+ $priority = $a_priority;
+ // else if we're adding to the sorted priority, we don't know the title or callback. Grab them from the previously added context/priority.
+ } elseif ( 'sorted' == $priority ) {
+ $title = $wp_meta_boxes[$page][$a_context][$a_priority][$id]['title'];
+ $callback = $wp_meta_boxes[$page][$a_context][$a_priority][$id]['callback'];
+ $callback_args = $wp_meta_boxes[$page][$a_context][$a_priority][$id]['args'];
+ }
+ // An id can be in only one priority and one context
+ if ( $priority != $a_priority || $context != $a_context )
+ unset($wp_meta_boxes[$page][$a_context][$a_priority][$id]);
+ }
+ }
+
+ if ( empty($priority) )
+ $priority = 'low';
+
+ if ( !isset($wp_meta_boxes[$page][$context][$priority]) )
+ $wp_meta_boxes[$page][$context][$priority] = array();
+
+ $wp_meta_boxes[$page][$context][$priority][$id] = array('id' => $id, 'title' => $title, 'callback' => $callback, 'args' => $callback_args);
+}
+
+/**
+ * Meta-Box template function
+ *
+ * @since 2.5.0
+ *
+ * @param string|object $screen Screen identifier
+ * @param string $context box context
+ * @param mixed $object gets passed to the box callback function as first parameter
+ * @return int number of meta_boxes
+ */
+function do_meta_boxes( $screen, $context, $object ) {
+ global $wp_meta_boxes;
+ static $already_sorted = false;
+
+ if ( empty( $screen ) )
+ $screen = get_current_screen();
+ elseif ( is_string( $screen ) )
+ $screen = convert_to_screen( $screen );
+
+ $page = $screen->id;
+
+ $hidden = get_hidden_meta_boxes( $screen );
+
+ printf('<div id="%s-sortables" class="meta-box-sortables">', htmlspecialchars($context));
+
+ $i = 0;
+ do {
+ // Grab the ones the user has manually sorted. Pull them out of their previous context/priority and into the one the user chose
+ if ( !$already_sorted && $sorted = get_user_option( "meta-box-order_$page" ) ) {
+ foreach ( $sorted as $box_context => $ids ) {
+ foreach ( explode(',', $ids ) as $id ) {
+ if ( $id && 'dashboard_browser_nag' !== $id )
+ add_meta_box( $id, null, null, $screen, $box_context, 'sorted' );
+ }
+ }
+ }
+ $already_sorted = true;
+
+ if ( !isset($wp_meta_boxes) || !isset($wp_meta_boxes[$page]) || !isset($wp_meta_boxes[$page][$context]) )
+ break;
+
+ foreach ( array('high', 'sorted', 'core', 'default', 'low') as $priority ) {
+ if ( isset($wp_meta_boxes[$page][$context][$priority]) ) {
+ foreach ( (array) $wp_meta_boxes[$page][$context][$priority] as $box ) {
+ if ( false == $box || ! $box['title'] )
+ continue;
+ $i++;
+ $hidden_class = in_array($box['id'], $hidden) ? ' hide-if-js' : '';
+ echo '<div id="' . $box['id'] . '" class="postbox ' . postbox_classes($box['id'], $page) . $hidden_class . '" ' . '>' . "\n";
+ if ( 'dashboard_browser_nag' != $box['id'] )
+ echo '<div class="handlediv" title="' . esc_attr__('Click to toggle') . '"><br /></div>';
+ echo "<h3 class='hndle'><span>{$box['title']}</span></h3>\n";
+ echo '<div class="inside">' . "\n";
+ call_user_func($box['callback'], $object, $box);
+ echo "</div>\n";
+ echo "</div>\n";
+ }
+ }
+ }
+ } while(0);
+
+ echo "</div>";
+
+ return $i;
+
+}
+
+/**
+ * Remove a meta box from an edit form.
+ *
+ * @since 2.6.0
+ *
+ * @param string $id String for use in the 'id' attribute of tags.
+ * @param string|object $screen The screen on which to show the box (post, page, link).
+ * @param string $context The context within the page where the boxes should show ('normal', 'advanced').
+ */
+function remove_meta_box($id, $screen, $context) {
+ global $wp_meta_boxes;
+
+ if ( empty( $screen ) )
+ $screen = get_current_screen();
+ elseif ( is_string( $screen ) )
+ $screen = convert_to_screen( $screen );
+
+ $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 );
+ ?>
+ <div id="side-sortables" class="accordion-container">
+ <ul class="outer-border">
+ <?php
+ $i = 0;
+ $first_open = false;
+ do {
+ if ( ! isset( $wp_meta_boxes ) || ! isset( $wp_meta_boxes[$page] ) || ! isset( $wp_meta_boxes[$page][$context] ) )
+ break;
+
+ foreach ( array( 'high', 'core', 'default', 'low' ) as $priority ) {
+ if ( isset( $wp_meta_boxes[$page][$context][$priority] ) ) {
+ foreach ( $wp_meta_boxes[$page][$context][$priority] as $box ) {
+ if ( false == $box || ! $box['title'] )
+ continue;
+ $i++;
+ $hidden_class = in_array( $box['id'], $hidden ) ? 'hide-if-js' : '';
+
+ $open_class = '';
+ if ( ! $first_open && empty( $hidden_class ) ) {
+ $first_open = true;
+ $open_class = 'open';
+ }
+ ?>
+ <li class="control-section accordion-section <?php echo $hidden_class; ?> <?php echo $open_class; ?> <?php echo esc_attr( $box['id'] ); ?>" id="<?php echo esc_attr( $box['id'] ); ?>">
+ <h3 class="accordion-section-title hndle" tabindex="0" title="<?php echo esc_attr( $box['title'] ); ?>"><?php echo esc_html( $box['title'] ); ?></h3>
+ <div class="accordion-section-content <?php postbox_classes( $box['id'], $page ); ?>">
+ <div class="inside">
+ <?php call_user_func( $box['callback'], $object, $box ); ?>
+ </div><!-- .inside -->
+ </div><!-- .accordion-section-content -->
+ </li><!-- .accordion-section -->
+ <?php
+ }
+ }
+ }
+ } while(0);
+ ?>
+ </ul><!-- .outer-border -->
+ </div><!-- .accordion-container -->
+ <?php
+ return $i;
+}
+
+/**
+ * Add a new section to a settings page.
+ *
+ * Part of the Settings API. Use this to define new settings sections for an admin page.
+ * Show settings sections in your admin page callback function with do_settings_sections().
+ * Add settings fields to your section with add_settings_field()
+ *
+ * The $callback argument should be the name of a function that echoes out any
+ * content you want to show at the top of the settings section before the actual
+ * fields. It can output nothing if you want.
+ *
+ * @since 2.7.0
+ *
+ * @global $wp_settings_sections Storage array of all settings sections added to admin pages
+ *
+ * @param string $id Slug-name to identify the section. Used in the 'id' attribute of tags.
+ * @param string $title Formatted title of the section. Shown as the heading for the section.
+ * @param string $callback Function that echos out any content at the top of the section (between heading and fields).
+ * @param string $page The slug-name of the settings page on which to show the section. Built-in pages include 'general', 'reading', 'writing', 'discussion', 'media', etc. Create your own using add_options_page();
+ */
+function add_settings_section($id, $title, $callback, $page) {
+ global $wp_settings_sections;
+
+ if ( 'misc' == $page ) {
+ _deprecated_argument( __FUNCTION__, '3.0', sprintf( __( 'The "%s" options group has been removed. Use another settings group.' ), 'misc' ) );
+ $page = 'general';
+ }
+
+ if ( 'privacy' == $page ) {
+ _deprecated_argument( __FUNCTION__, '3.5', sprintf( __( 'The "%s" options group has been removed. Use another settings group.' ), 'privacy' ) );
+ $page = 'reading';
+ }
+
+ $wp_settings_sections[$page][$id] = array('id' => $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
+ *
+ * @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 string $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 The slug-name of the section of the settings page in which to show the box (default, ...).
+ * @param array $args Additional arguments
+ */
+function add_settings_field($id, $title, $callback, $page, $section = 'default', $args = array()) {
+ global $wp_settings_fields;
+
+ if ( 'misc' == $page ) {
+ _deprecated_argument( __FUNCTION__, '3.0', __( 'The miscellaneous options group has been removed. Use another settings group.' ) );
+ $page = 'general';
+ }
+
+ if ( 'privacy' == $page ) {
+ _deprecated_argument( __FUNCTION__, '3.5', __( 'The privacy options group has been removed. Use another settings group.' ) );
+ $page = 'reading';
+ }
+
+ $wp_settings_fields[$page][$section][$id] = array('id' => $id, 'title' => $title, 'callback' => $callback, 'args' => $args);
+}
+
+/**
+ * Prints out all settings sections added to a particular settings page
+ *
+ * Part of the Settings API. Use this in a settings page callback function
+ * to output all the sections and fields that were added to that $page with
+ * add_settings_section() and add_settings_field()
+ *
+ * @global $wp_settings_sections Storage array of all settings sections added to admin pages
+ * @global $wp_settings_fields Storage array of settings fields and info about their pages/sections
+ * @since 2.7.0
+ *
+ * @param string $page The slug name of the page whos settings sections you want to output
+ */
+function do_settings_sections( $page ) {
+ global $wp_settings_sections, $wp_settings_fields;
+
+ if ( ! isset( $wp_settings_sections[$page] ) )
+ return;
+
+ foreach ( (array) $wp_settings_sections[$page] as $section ) {
+ if ( $section['title'] )
+ echo "<h3>{$section['title']}</h3>\n";
+
+ if ( $section['callback'] )
+ call_user_func( $section['callback'], $section );
+
+ if ( ! isset( $wp_settings_fields ) || !isset( $wp_settings_fields[$page] ) || !isset( $wp_settings_fields[$page][$section['id']] ) )
+ continue;
+ echo '<table class="form-table">';
+ do_settings_fields( $page, $section['id'] );
+ echo '</table>';
+ }
+}
+
+/**
+ * Print out the settings fields for a particular settings section
+ *
+ * Part of the Settings API. Use this in a settings page to output
+ * a specific section. Should normally be called by do_settings_sections()
+ * rather than directly.
+ *
+ * @global $wp_settings_fields Storage array of settings fields and their pages/sections
+ *
+ * @since 2.7.0
+ *
+ * @param string $page Slug title of the admin page who's settings fields you want to show.
+ * @param section $section Slug title of the settings section who's fields you want to show.
+ */
+function do_settings_fields($page, $section) {
+ global $wp_settings_fields;
+
+ if ( ! isset( $wp_settings_fields[$page][$section] ) )
+ return;
+
+ foreach ( (array) $wp_settings_fields[$page][$section] as $field ) {
+ echo '<tr valign="top">';
+ if ( !empty($field['args']['label_for']) )
+ echo '<th scope="row"><label for="' . esc_attr( $field['args']['label_for'] ) . '">' . $field['title'] . '</label></th>';