# Welcome to the PDT Online Help

## Using the PDT Help System

Browse topics in the Contents frame () on the left. Click on a topic to have it displayed. Use the Back and Forward buttons to navigate within the history of viewed topics.

## Searching

To quickly locate topics on a particular subject in the documentation, enter a query in the Search field. Use the Search frame () to display the Search view. You can narrow the scope of your search by selecting only the sections you are interested in.

## Synchronizing

After you run a search and find a topic you were looking for, click the Show in Table of Contents button () to match the navigation tree with the current topic. You might also find it useful to synchronize after following in-topic links.

## Capabilities

To show documentation about capabilities that are disabled in the application, select the Show All Topics button (). When you choose to show all topics in the table of contents, the headings for documentation about any disabled activities are shown in the table of contents and also appear in search results.

## More information

If you cannot find the answer to your question in the online help, visit one of these locations:

- The PHP manual at http://php.net for further documentation about PHP scripting.