bulk_edit_posts( array $post_data = null )

function bulk_edit_posts( $post_data = null ) {
	global $wpdb;

	if ( empty($post_data) )
		$post_data = &$_POST;

	if ( isset($post_data['post_type']) )
		$ptype = get_post_type_object($post_data['post_type']);
	else
		$ptype = get_post_type_object('post');

	if ( !current_user_can( $ptype->cap->edit_posts ) ) {
		if ( 'page' == $ptype->name )
			wp_die( __('Sorry, you are not allowed to edit pages.'));
		else
			wp_die( __('Sorry, you are not allowed to edit posts.'));
	}

	if ( -1 == $post_data['_status'] ) {
		$post_data['post_status'] = null;
		unset($post_data['post_status']);
	} else {
		$post_data['post_status'] = $post_data['_status'];
	}
	unset($post_data['_status']);

	if ( ! empty( $post_data['post_status'] ) ) {
		$post_data['post_status'] = sanitize_key( $post_data['post_status'] );

		if ( 'inherit' == $post_data['post_status'] ) {
			unset( $post_data['post_status'] );
		}
	}

	$post_IDs = array_map( 'intval', (array) $post_data['post'] );

	$reset = array(
		'post_author', 'post_status', 'post_password',
		'post_parent', 'page_template', 'comment_status',
		'ping_status', 'keep_private', 'tax_input',
		'post_category', 'sticky', 'post_format',
	);

	foreach ( $reset as $field ) {
		if ( isset($post_data[$field]) && ( '' == $post_data[$field] || -1 == $post_data[$field] ) )
			unset($post_data[$field]);
	}

	if ( isset($post_data['post_category']) ) {
		if ( is_array($post_data['post_category']) && ! empty($post_data['post_category']) )
			$new_cats = array_map( 'absint', $post_data['post_category'] );
		else
			unset($post_data['post_category']);
	}

	$tax_input = array();
	if ( isset($post_data['tax_input'])) {
		foreach ( $post_data['tax_input'] as $tax_name => $terms ) {
			if ( empty($terms) )
				continue;
			if ( is_taxonomy_hierarchical( $tax_name ) ) {
				$tax_input[ $tax_name ] = array_map( 'absint', $terms );
			} else {
				$comma = _x( ',', 'tag delimiter' );
				if ( ',' !== $comma )
					$terms = str_replace( $comma, ',', $terms );
				$tax_input[ $tax_name ] = explode( ',', trim( $terms, " \n\t\r\0\x0B," ) );
			}
		}
	}

	if ( isset($post_data['post_parent']) && ($parent = (int) $post_data['post_parent']) ) {
		$pages = $wpdb->get_results("SELECT ID, post_parent FROM $wpdb->posts WHERE post_type = 'page'");
		$children = array();

		for ( $i = 0; $i < 50 && $parent > 0; $i++ ) {
			$children[] = $parent;

			foreach ( $pages as $page ) {
				if ( $page->ID == $parent ) {
					$parent = $page->post_parent;
					break;
				}
			}
		}
	}

	$updated = $skipped = $locked = array();
	$shared_post_data = $post_data;

	foreach ( $post_IDs as $post_ID ) {
		// Start with fresh post data with each iteration.
		$post_data = $shared_post_data;

		$post_type_object = get_post_type_object( get_post_type( $post_ID ) );

		if ( !isset( $post_type_object ) || ( isset($children) && in_array($post_ID, $children) ) || !current_user_can( 'edit_post', $post_ID ) ) {
			$skipped[] = $post_ID;
			continue;
		}

		if ( wp_check_post_lock( $post_ID ) ) {
			$locked[] = $post_ID;
			continue;
		}

		$post = get_post( $post_ID );
		$tax_names = get_object_taxonomies( $post );
		foreach ( $tax_names as $tax_name ) {
			$taxonomy_obj = get_taxonomy($tax_name);
			if ( isset( $tax_input[$tax_name]) && current_user_can( $taxonomy_obj->cap->assign_terms ) )
				$new_terms = $tax_input[$tax_name];
			else
				$new_terms = array();

			if ( $taxonomy_obj->hierarchical )
				$current_terms = (array) wp_get_object_terms( $post_ID, $tax_name, array('fields' => 'ids') );
			else
				$current_terms = (array) wp_get_object_terms( $post_ID, $tax_name, array('fields' => 'names') );

			$post_data['tax_input'][$tax_name] = array_merge( $current_terms, $new_terms );
		}

		if ( isset($new_cats) && in_array( 'category', $tax_names ) ) {
			$cats = (array) wp_get_post_categories($post_ID);
			$post_data['post_category'] = array_unique( array_merge($cats, $new_cats) );
			unset( $post_data['tax_input']['category'] );
		}

		$post_data['post_ID']        = $post_ID;
		$post_data['post_type'] = $post->post_type;
		$post_data['post_mime_type'] = $post->post_mime_type;

		foreach ( array( 'comment_status', 'ping_status', 'post_author' ) as $field ) {
			if ( ! isset( $post_data[ $field ] ) ) {
				$post_data[ $field ] = $post->$field;
			}
		}

		$post_data = _wp_translate_postdata( true, $post_data );
		if ( is_wp_error( $post_data ) ) {
			$skipped[] = $post_ID;
			continue;
		}
		$post_data = _wp_get_allowed_postdata( $post_data );

		if ( isset( $shared_post_data['post_format'] ) ) {
			set_post_format( $post_ID, $shared_post_data['post_format'] );
			unset( $post_data['tax_input']['post_format'] );
		}

		$updated[] = wp_update_post( $post_data );

		if ( isset( $post_data['sticky'] ) && current_user_can( $ptype->cap->edit_others_posts ) ) {
			if ( 'sticky' == $post_data['sticky'] )
				stick_post( $post_ID );
			else
				unstick_post( $post_ID );
		}
	}

	return array( 'updated' => $updated, 'skipped' => $skipped, 'locked' => $locked );
}