er is trying to edit someone else's post.
			$caps[] = 'delete_others_posts';
			// The post is published, extra cap required.
			if ( 'publish' == $post->post_status )
				$caps[] = 'delete_published_posts';
			elseif ( 'private' == $post->post_status )
				$caps[] = 'delete_private_posts';
		}
		break;
	case 'delete_page':
		$author_data = get_userdata( $user_id );
		//echo "post ID: {$args[0]}<br />";
		$page = get_page( $args[0] );
		$page_author_data = get_userdata( $page->post_author );
		//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
		// If the user is the author...

		if ('' != $page->post_author) {
			$page_author_data = get_userdata( $page->post_author );
		} else {
			//No author set yet so default to current user for cap checks
			$page_author_data = $author_data;
		}

		if ( $user_id == $page_author_data->ID ) {
			// If the page is published...
			if ( $page->post_status == 'publish' ) {
				$caps[] = 'delete_published_pages';
			} elseif ( 'trash' == $page->post_status ) {
				if ('publish' == get_post_meta($page->ID, '_wp_trash_meta_status', true) )
					$caps[] = 'delete_published_pages';
			} else {
				// If the page is draft...
				$caps[] = 'delete_pages';
			}
		} else {
			// The user is trying to edit someone else's page.
			$caps[] = 'delete_others_pages';
			// The page is published, extra cap required.
			if ( $page->post_status == 'publish' )
				$caps[] = 'delete_published_pages';
			elseif ( $page->post_status == 'private' )
				$caps[] = 'delete_private_pages';
		}
		break;
		// edit_post breaks down to edit_posts, edit_published_posts, or
		// edit_others_posts
	case 'edit_post':
		$author_data = get_userdata( $user_id );
		//echo "post ID: {$args[0]}<br />";
		$post = get_post( $args[0] );
		if ( 'page' == $post->post_type ) {
			$args = array_merge( array( 'edit_page', $user_id ), $args );
			return call_user_func_array( 'map_meta_cap', $args );
		}
		$post_author_data = get_userdata( $post->post_author );
		//echo "current user id : $user_id, post author id: " . $post_author_data->ID . "<br />";
		// If the user is the author...
		if ( $user_id == $post_author_data->ID ) {
			// If the post is published...
			if ( 'publish' == $post->post_status ) {
				$caps[] = 'edit_published_posts';
			} elseif ( 'trash' == $post->post_status ) {
				if ('publish' == get_post_meta($post->ID, '_wp_trash_meta_status', true) )
					$caps[] = 'edit_published_posts';
			} else {
				// If the post is draft...
				$caps[] = 'edit_posts';
			}
		} else {
			// The user is trying to edit someone else's post.
			$caps[] = 'edit_others_posts';
			// The post is published, extra cap required.
			if ( 'publish' == $post->post_status )
				$caps[] = 'edit_published_posts';
			elseif ( 'private' == $post->post_status )
				$caps[] = 'edit_private_posts';
		}
		break;
	case 'edit_page':
		$author_data = get_userdata( $user_id );
		//echo "post ID: {$args[0]}<br />";
		$page = get_page( $args[0] );
		$page_author_data = get_userdata( $page->post_author );
		//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
		// If the user is the author...
		if ( $user_id == $page_author_data->ID ) {
			// If the page is published...
			if ( 'publish' == $page->post_status ) {
				$caps[] = 'edit_published_pages';
			} elseif ( 'trash' == $page->post_status ) {
				if ('publish' == get_post_meta($page->ID, '_wp_trash_meta_status', true) )
					$caps[] = 'edit_published_pages';
			} else {
				// If the page is draft...
				$caps[] = 'edit_pages';
			}
		} else {
			// The user is trying to edit someone else's page.
			$caps[] = 'edit_others_pages';
			// The page is published, extra cap required.
			if ( 'publish' == $page->post_status )
				$caps[] = 'edit_published_pages';
			elseif ( 'private' == $page->post_status )
				$caps[] = 'edit_private_pages';
		}
		break;
	case 'read_post':
		$post = get_post( $args[0] );
		if ( 'page' == $post->post_type ) {
			$args = array_merge( array( 'read_page', $user_id ), $args );
			return call_user_func_array( 'map_meta_cap', $args );
		}

		if ( 'private' != $post->post_status ) {
			$caps[] = 'read';
			break;
		}

		$author_data = get_userdata( $user_id );
		$post_author_data = get_userdata( $post->post_author );
		if ( $user_id == $post_author_data->ID )
			$caps[] = 'read';
		else
			$caps[] = 'read_private_posts';
		break;
	case 'read_page':
		$page = get_page( $args[0] );

		if ( 'private' != $page->post_status ) {
			$caps[] = 'read';
			break;
		}

		$author_data = get_userdata( $user_id );
		$page_author_data = get_userdata( $page->post_author );
		if ( $user_id == $page_author_data->ID )
			$caps[] = 'read';
		else
			$caps[] = 'read_private_pages';
		break;
	case 'unfiltered_upload':
		if ( defined('ALLOW_UNFILTERED_UPLOADS') && ALLOW_UNFILTERED_UPLOADS == true )
			$caps[] = $cap;
		else
			$caps[] = 'do_not_allow';
		break;
	default:
		// If no meta caps match, return the original cap.
		$caps[] = $cap;
	}

	return apply_filters('map_meta_cap', $caps, $cap, $user_id, $args);
}

/**
 * Whether current user has capability or role.
 *
 * @since 2.0.0
 *
 * @param string $capability Capability or role name.
 * @return bool
 */
function current_user_can( $capability ) {
	$current_user = wp_get_current_user();

	if ( empty( $current_user ) )
		return false;

	$args = array_slice( func_get_args(), 1 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( &$current_user, 'has_cap' ), $args );
}

/**
 * Whether author of supplied post has capability or role.
 *
 * @since 2.9.0
 *
 * @param int|object $post Post ID or post object.
 * @param string $capability Capability or role name.
 * @return bool
 */
function author_can( $post, $capability ) {
	if ( !$post = get_post($post) )
		return false;

	$author = new WP_User( $post->post_author );

	if ( empty( $author ) )
		return false;

	$args = array_slice( func_get_args(), 2 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( &$author, 'has_cap' ), $args );
}

/**
 * Retrieve role object.
 *
 * @see WP_Roles::get_role() Uses method to retrieve role object.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @return object
 */
function get_role( $role ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->get_role( $role );
}

/**
 * Add role, if it does not exist.
 *
 * @see WP_Roles::add_role() Uses method to add role.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @param string $display_name Display name for role.
 * @param array $capabilities List of capabilities.
 * @return null|WP_Role WP_Role object if role is added, null if already exists.
 */
function add_role( $role, $display_name, $capabilities = array() ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->add_role( $role, $display_name, $capabilities );
}

/**
 * Remove role, if it exists.
 *
 * @see WP_Roles::remove_role() Uses method to remove role.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @return null
 */
function remove_role( $role ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->remove_role( $role );
}

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	<description>Just another WordPress weblog</description>
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		<title>Hello world!</title>
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		<pubDate>Thu, 24 Dec 2009 11:25:50 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

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		<description><![CDATA[Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!
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