<?php

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/**

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* Build Administration Menu.

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*

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* @package WordPress

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* @subpackage Administration

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*/

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if ( is_network_admin() ) {

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/**

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* Fires before the administration menu loads in the Network Admin.

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*

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* The hook fires before menus and sub-menus are removed based on user privileges.

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*

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* @private

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* @since 3.1.0

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*/

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do_action( '_network_admin_menu' );

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} elseif ( is_user_admin() ) {

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/**

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* Fires before the administration menu loads in the User Admin.

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*

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* The hook fires before menus and sub-menus are removed based on user privileges.

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*

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* @private

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* @since 3.1.0

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*/

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do_action( '_user_admin_menu' );

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} else {

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/**

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* Fires before the administration menu loads in the admin.

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*

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* The hook fires before menus and sub-menus are removed based on user privileges.

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*

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* @private

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* @since 2.2.0

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*/

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do_action( '_admin_menu' );

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}

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// Create list of page plugin hook names.

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foreach ( $menu as $menu_page ) {

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$pos = strpos( $menu_page[2], '?' );

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if ( false !== $pos ) {

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// Handle post_type=post|page|foo pages.

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$hook_name = substr( $menu_page[2], 0, $pos );

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$hook_args = substr( $menu_page[2], $pos + 1 );

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wp_parse_str( $hook_args, $hook_args );

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// Set the hook name to be the post type.

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if ( isset( $hook_args['post_type'] ) ) {

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$hook_name = $hook_args['post_type'];

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} else {

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$hook_name = basename( $hook_name, '.php' );

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}

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unset( $hook_args );

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} else {

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$hook_name = basename( $menu_page[2], '.php' );

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}

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$hook_name = sanitize_title( $hook_name );

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if ( isset( $compat[ $hook_name ] ) ) {

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$hook_name = $compat[ $hook_name ];

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} elseif ( ! $hook_name ) {

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continue;

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}

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$admin_page_hooks[ $menu_page[2] ] = $hook_name;

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}

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unset( $menu_page, $compat );

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$_wp_submenu_nopriv = array();

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$_wp_menu_nopriv = array();

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// Loop over submenus and remove pages for which the user does not have privs.

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foreach ( $submenu as $parent => $sub ) {

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foreach ( $sub as $index => $data ) {

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if ( ! current_user_can( $data[1] ) ) {

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unset( $submenu[ $parent ][ $index ] );

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$_wp_submenu_nopriv[ $parent ][ $data[2] ] = true;

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}

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}

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unset( $index, $data );

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if ( empty( $submenu[ $parent ] ) ) {

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unset( $submenu[ $parent ] );

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}

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}

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unset( $sub, $parent );

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/*

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* Loop over the top-level menu.

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* Menus for which the original parent is not accessible due to lack of privileges

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* will have the next submenu in line be assigned as the new menu parent.

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*/

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foreach ( $menu as $id => $data ) {

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if ( empty( $submenu[ $data[2] ] ) ) {

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continue;

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}

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$subs = $submenu[ $data[2] ];

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$first_sub = reset( $subs );

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$old_parent = $data[2];

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$new_parent = $first_sub[2];

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/*

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* If the first submenu is not the same as the assigned parent,

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* make the first submenu the new parent.

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*/

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if ( $new_parent != $old_parent ) {

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$_wp_real_parent_file[ $old_parent ] = $new_parent;

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$menu[ $id ][2] = $new_parent;

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foreach ( $submenu[ $old_parent ] as $index => $data ) {

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$submenu[ $new_parent ][ $index ] = $submenu[ $old_parent ][ $index ];

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unset( $submenu[ $old_parent ][ $index ] );

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}

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unset( $submenu[ $old_parent ], $index );

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if ( isset( $_wp_submenu_nopriv[ $old_parent ] ) ) {

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$_wp_submenu_nopriv[ $new_parent ] = $_wp_submenu_nopriv[ $old_parent ];

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}

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}

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}

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unset( $id, $data, $subs, $first_sub, $old_parent, $new_parent );

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if ( is_network_admin() ) {

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/**

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* Fires before the administration menu loads in the Network Admin.

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*

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* @since 3.1.0

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*

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* @param string $context Empty context.

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*/

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do_action( 'network_admin_menu', '' );

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} elseif ( is_user_admin() ) {

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/**

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* Fires before the administration menu loads in the User Admin.

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*

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* @since 3.1.0

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*

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* @param string $context Empty context.

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*/

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do_action( 'user_admin_menu', '' );

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} else {

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/**

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* Fires before the administration menu loads in the admin.

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*

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* @since 1.5.0

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*

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* @param string $context Empty context.

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*/

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do_action( 'admin_menu', '' );

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}

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/*

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* Remove menus that have no accessible submenus and require privileges

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* that the user does not have. Run re-parent loop again.

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*/

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foreach ( $menu as $id => $data ) {

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if ( ! current_user_can( $data[1] ) ) {

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$_wp_menu_nopriv[ $data[2] ] = true;

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}

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/*

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* If there is only one submenu and it is has same destination as the parent,

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* remove the submenu.

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*/

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if ( ! empty( $submenu[ $data[2] ] ) && 1 === count( $submenu[ $data[2] ] ) ) {

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$subs = $submenu[ $data[2] ];

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$first_sub = reset( $subs );

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if ( $data[2] == $first_sub[2] ) {

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unset( $submenu[ $data[2] ] );

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}

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}

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// If submenu is empty...

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if ( empty( $submenu[ $data[2] ] ) ) {

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// And user doesn't have privs, remove menu.

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if ( isset( $_wp_menu_nopriv[ $data[2] ] ) ) {

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unset( $menu[ $id ] );

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}

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}

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}

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unset( $id, $data, $subs, $first_sub );

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/**

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* @param string $add

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* @param string $class

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* @return string

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*/

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function add_cssclass( $add, $class ) {

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$class = empty( $class ) ? $add : $class .= ' ' . $add;

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return $class;

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}

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/**

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* @param array $menu

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* @return array

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*/

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function add_menu_classes( $menu ) {

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$first = false;

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$lastorder = false;

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$i = 0;

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$mc = count( $menu );

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foreach ( $menu as $order => $top ) {

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$i++;

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if ( 0 == $order ) { // Dashboard is always shown/single.

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$menu[0][4] = add_cssclass( 'menu-top-first', $top[4] );

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$lastorder = 0;

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continue;

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}

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if ( 0 === strpos( $top[2], 'separator' ) && false !== $lastorder ) { // If separator.

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$first = true;

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$c = $menu[ $lastorder ][4];

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$menu[ $lastorder ][4] = add_cssclass( 'menu-top-last', $c );

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continue;

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}

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if ( $first ) {

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$c = $menu[ $order ][4];

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$menu[ $order ][4] = add_cssclass( 'menu-top-first', $c );

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$first = false;

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}

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if ( $mc == $i ) { // Last item.

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$c = $menu[ $order ][4];

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$menu[ $order ][4] = add_cssclass( 'menu-top-last', $c );

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}

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$lastorder = $order;

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}

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/**

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* Filters administration menus array with classes added for top-level items.

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*

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* @since 2.7.0

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*

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* @param array $menu Associative array of administration menu items.

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*/

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return apply_filters( 'add_menu_classes', $menu );

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}

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uksort( $menu, 'strnatcasecmp' ); // Make it all pretty.

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/**

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* Filters whether to enable custom ordering of the administration menu.

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*

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* See the {@see 'menu_order'} filter for reordering menu items.

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*

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* @since 2.8.0

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*

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* @param bool $custom Whether custom ordering is enabled. Default false.

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*/

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if ( apply_filters( 'custom_menu_order', false ) ) {

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$menu_order = array();

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foreach ( $menu as $menu_item ) {

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$menu_order[] = $menu_item[2];

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}

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unset( $menu_item );

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$default_menu_order = $menu_order;

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/**

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* Filters the order of administration menu items.

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*

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* A truthy value must first be passed to the {@see 'custom_menu_order'} filter

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* for this filter to work. Use the following to enable custom menu ordering:

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*

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* add_filter( 'custom_menu_order', '__return_true' );

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*

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* @since 2.8.0

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*

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* @param array $menu_order An ordered array of menu items.

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*/

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$menu_order = apply_filters( 'menu_order', $menu_order );

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$menu_order = array_flip( $menu_order );

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$default_menu_order = array_flip( $default_menu_order );

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/**

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* @global array $menu_order

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* @global array $default_menu_order

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*

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* @param array $a

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* @param array $b

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* @return int

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*/

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function sort_menu( $a, $b ) {

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global $menu_order, $default_menu_order;

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$a = $a[2];

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$b = $b[2];

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if ( isset( $menu_order[ $a ] ) && ! isset( $menu_order[ $b ] ) ) {

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return -1;

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} elseif ( ! isset( $menu_order[ $a ] ) && isset( $menu_order[ $b ] ) ) {

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return 1;

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} elseif ( isset( $menu_order[ $a ] ) && isset( $menu_order[ $b ] ) ) {

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if ( $menu_order[ $a ] == $menu_order[ $b ] ) {

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return 0;

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}

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return ( $menu_order[ $a ] < $menu_order[ $b ] ) ? -1 : 1;

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} else {

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return ( $default_menu_order[ $a ] <= $default_menu_order[ $b ] ) ? -1 : 1;

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}

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}

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usort( $menu, 'sort_menu' );

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unset( $menu_order, $default_menu_order );

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}

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// Prevent adjacent separators.

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$prev_menu_was_separator = false;

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foreach ( $menu as $id => $data ) {

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if ( false === stristr( $data[4], 'wp-menu-separator' ) ) {

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// This item is not a separator, so falsey the toggler and do nothing.

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$prev_menu_was_separator = false;

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} else {

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// The previous item was a separator, so unset this one.

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if ( true === $prev_menu_was_separator ) {

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unset( $menu[ $id ] );

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}

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// This item is a separator, so truthy the toggler and move on.

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$prev_menu_was_separator = true;

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}

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}

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unset( $id, $data, $prev_menu_was_separator );

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// Remove the last menu item if it is a separator.

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$last_menu_key = array_keys( $menu );

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$last_menu_key = array_pop( $last_menu_key );

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if ( ! empty( $menu ) && 'wp-menu-separator' === $menu[ $last_menu_key ][4] ) {

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unset( $menu[ $last_menu_key ] );

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}

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unset( $last_menu_key );

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if ( ! user_can_access_admin_page() ) {

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/**

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* Fires when access to an admin page is denied.

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*

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* @since 2.5.0

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*/

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do_action( 'admin_page_access_denied' );

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wp_die( __( 'Sorry, you are not allowed to access this page.' ), 403 );

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}

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$menu = add_menu_classes( $menu );

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