* In WordPress Administration Screens

 * @since 2.3.2

if ( ! defined('WP_ADMIN') )

	define('WP_ADMIN', true);

if ( ! defined('WP_NETWORK_ADMIN') )

	define('WP_NETWORK_ADMIN', false);

if ( ! defined('WP_USER_ADMIN') )

	define('WP_USER_ADMIN', false);

if ( ! WP_NETWORK_ADMIN && ! WP_USER_ADMIN ) {

	define('WP_BLOG_ADMIN', true);

}

if ( isset($_GET['import']) && !defined('WP_LOAD_IMPORTERS') )

	define('WP_LOAD_IMPORTERS', true);

require_once(dirname(dirname(__FILE__)) . '/wp-load.php');

	flush_rewrite_rules();

} elseif ( get_option('db_version') != $wp_db_version && empty($_POST) ) {

	if ( !is_multisite() ) {

		wp_redirect(admin_url('upgrade.php?_wp_http_referer=' . urlencode(stripslashes($_SERVER['REQUEST_URI']))));

		exit;

	} elseif ( apply_filters( 'do_mu_upgrade', true ) ) {

		/**

		 * On really small MU installs run the upgrader every time,

		 * else run it less often to reduce load.

		 *

		 * @since 2.8.4b

		 */

		$c = get_blog_count();

		if ( $c <= 50 || ( $c > 50 && mt_rand( 0, (int)( $c / 50 ) ) == 1 ) ) {

			require_once( ABSPATH . WPINC . '/http.php' );

			$response = wp_remote_get( admin_url( 'upgrade.php?step=1' ), array( 'timeout' => 120, 'httpversion' => '1.1' ) );

			do_action( 'after_mu_upgrade', $response );

			unset($response);

		}

		unset($c);

	}

if ( isset($_GET['page']) ) {

if ( isset( $_REQUEST['post_type'] ) && post_type_exists( $_REQUEST['post_type'] ) )

	$typenow = $_REQUEST['post_type'];

else

	$typenow = '';

if ( isset( $_REQUEST['taxonomy'] ) && taxonomy_exists( $_REQUEST['taxonomy'] ) )

	$taxnow = $_REQUEST['taxonomy'];

else

	$taxnow = '';

if ( WP_NETWORK_ADMIN )

	require(ABSPATH . 'wp-admin/network/menu.php');

elseif ( WP_USER_ADMIN )

	require(ABSPATH . 'wp-admin/user/menu.php');

else

	require(ABSPATH . 'wp-admin/menu.php');

if ( current_user_can( 'manage_options' ) )

	@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );

if ( isset($plugin_page) ) {

	if ( !empty($typenow) )

		$the_parent = $pagenow . '?post_type=' . $typenow;

	else

		$the_parent = $pagenow;

	if ( ! $page_hook = get_plugin_page_hook($plugin_page, $the_parent) ) {

			wp_redirect( admin_url('tools.php?' . $query_string) );

	unset($the_parent);

}

$hook_suffix = '';

if ( isset($page_hook) )

	$hook_suffix = $page_hook;

else if ( isset($plugin_page) )

	$hook_suffix = $plugin_page;

else if ( isset($pagenow) )

	$hook_suffix = $pagenow;

set_current_screen();

// Handle plugin admin pages.

if ( isset($plugin_page) ) {

		if ( validate_file($plugin_page) )

		if ( !( file_exists(WP_PLUGIN_DIR . "/$plugin_page") && is_file(WP_PLUGIN_DIR . "/$plugin_page") ) && !( file_exists(WPMU_PLUGIN_DIR . "/$plugin_page") && is_file(WPMU_PLUGIN_DIR . "/$plugin_page") ) )

		if ( !isset($_GET['noheader']))

		if ( file_exists(WPMU_PLUGIN_DIR . "/$plugin_page") )

			include(WPMU_PLUGIN_DIR . "/$plugin_page");

		else

			include(WP_PLUGIN_DIR . "/$plugin_page");

		wp_redirect( admin_url( 'import.php?invalid=' . $importer ) );

		exit;

	if ( ! isset($wp_importers[$importer]) || ! is_callable($wp_importers[$importer][2]) ) {

		wp_redirect( admin_url( 'import.php?invalid=' . $importer ) );

		exit;

	if ( apply_filters( 'force_filtered_html_on_import', false ) )

		kses_init_filters();  // Always filter imported data with kses on multisite.

	flush_rewrite_rules(false);

	// Backwards compatibility with old load-page-new.php, load-page.php,

	// and load-categories.php actions.

	if ( $typenow == 'page' ) {

		if ( $pagenow == 'post-new.php' )

			do_action( 'load-page-new.php' );

		elseif ( $pagenow == 'post.php' )

			do_action( 'load-page.php' );

	}  elseif ( $pagenow == 'edit-tags.php' ) {

		if ( $taxnow == 'category' )

			do_action( 'load-categories.php' );

		elseif ( $taxnow == 'link_category' )

			do_action( 'load-edit-link-categories.php' );

	}