Sometimes, one extension’s ability to function depends on the presence of another extension. The pm_Extension class is used to collect information and perform basic operations on extensions:

• Retrieve information on installed extensions,
• Check extensions version, state,
• Install/uninstall, enable/disable extensions.

Retrieving Extensions Data

Use the following methods to retrieve information on installed extensions.

• getExtensions() - Retrieve the list of all installed extensions,
• getById($id) - Get the extension by its identifier.

The following code retrieves all installed extensions, then fetches their IDs and activity states.

$extensions = pm_Extension::getExtensions();
foreach ($extensions as $extension) {
    $extension->getId();
    $extension->isActive();
}

The following methods fetch the extension’s data:

• getId() - extension ID,
• getName() - extension’s display name,
• getVersion() - version number,
• getRelease() - release number,
• isActive() - extension’s activity state.

The following code retrieves the WordPress Toolkit extension (ID: "wp-toolkit"), then fetches its display name and activity state.

$extension = pm_Extension::getById("wp-toolkit");
$extension->getName();
$extension->isActive();

Controlling Extensions

The pm_Extension class also provides methods to enable and disable installed extensions, and to install and uninstall extensions:

• enable() - change extension’s state to enabled,
• disable() - change extension’s state to disabled,
• installById() - install the extension specified by its ID,
• installByUrl() - install the extension from the specified URL,
• installByFile() - install the extension from the specified file,
• uninstall() - uninstall the extension.