Wordpress/wp-admin/import.php

<?php
/**
 * Import WordPress Administration Panel
 *
 * @package WordPress
 * @subpackage Administration
 */

define('WP_LOAD_IMPORTERS', true);

/** Load WordPress Bootstrap */
require_once ('admin.php');

if ( !current_user_can('edit_files') )
	wp_die(__('You do not have sufficient permissions to import content in this site.'));

$title = __('Import');
add_thickbox();
require_once ('admin-header.php');
$parent_file = 'tools.php';
?>

<div class="wrap">
<?php screen_icon(); ?>
<h2><?php echo esc_html( $title ); ?></h2>
<p><?php _e('If you have posts or comments in another system, WordPress can import those into this site. To get started, choose a system to import from below:'); ?></p>

<?php

// Load all importers so that they can register.
$import_loc = 'wp-admin/import';
$import_root = ABSPATH.$import_loc;
$imports_dir = @ opendir($import_root);
if ($imports_dir) {
	while (($file = readdir($imports_dir)) !== false) {
		if ($file{0} == '.') {
			continue;
		} elseif (substr($file, -4) == '.php') {
			require_once($import_root . '/' . $file);
		}
	}
}
@closedir($imports_dir);

$popular_importers = array();
if ( current_user_can('install_plugins') )
	$popular_importers = array(
		'blogger' => array( __('Blogger'), __('Install the Blogger importer to import posts, comments, and users from a Blogger blog.'), 'install' ),
		'wpcat2tag' => array(__('Categories and Tags Converter'), __('Install the category/tag converter to convert existing categories to tags or tags to categories, selectively.'), 'install'),
		'livejournal' => array( __( 'LiveJournal' ), __( 'Install the LiveJournal importer to import posts from LiveJournal using their API.' ), 'install' ),
		'movabletype' => array( __('Movable Type and TypePad'), __('Install the Movable Type importer to import posts and comments from a Movable Type or TypePad blog.'), 'install' ),
		'opml' => array( __('Blogroll'), __('Install the blogroll importer to import links in OPML format.'), 'install' ),
		'rss' => array( __('RSS'), __('Install the RSS importer to import posts from an RSS feed.'), 'install' ),
		'wordpress' => array( 'WordPress', __('Install the WordPress importer to import posts, pages, comments, custom fields, categories, and tags from a WordPress export file.'), 'install' )
	);

$importers = get_importers();

// If a popular importer is not registered, create a dummy registration that links to the plugin installer.
foreach ( array_keys($popular_importers) as $pop_importer ) {
	if ( isset($importers[$pop_importer] ) )
		continue;

	$importers[$pop_importer] = $popular_importers[$pop_importer];
}

uasort($importers, create_function('$a, $b', 'return strcmp($a[0], $b[0]);'));

if (empty ($importers)) {
	echo '<p>'.__('No importers are available.').'</p>'; // TODO: make more helpful
} else {
?>
<table class="widefat" cellspacing="0">

<?php
	$style = '';
	foreach ($importers as $id => $data) {
		$style = ('class="alternate"' == $style || 'class="alternate active"' == $style) ? '' : 'alternate';
		if ( 'install' == $data[2] ) {
			$plugin_slug = $id . '-importer';
			$action = '<a href="' . admin_url('plugin-install.php?tab=plugin-information&amp;plugin=' . $plugin_slug .
									'&amp;TB_iframe=true&amp;width=600&amp;height=550') . '" class="thickbox" title="' .
									esc_attr__('Install importer') . '">' . $data[0] . '</a>';
		} else {
			$action = "<a href='" . esc_url("admin.php?import=$id") . "' title='" . esc_attr( wptexturize(strip_tags($data[1])) ) ."'>{$data[0]}</a>";
		}

		if ($style != '')
			$style = 'class="'.$style.'"';
		echo "
			<tr $style>
				<td class='import-system row-title'>$action</td>
				<td class='desc'>{$data[1]}</td>
			</tr>";
	}
?>

</table>
<?php
}

if ( current_user_can('install_plugins') )
	echo '<p>' . sprintf('If the importer you need is not listed, <a href="%s">search the plugins directory</a> to see if an importer is available.', admin_url('plugin-install.php?tab=search&type=tag&s=importer') ) . '</p>';
?>

</div>

<?php

include ('admin-footer.php');
?>