You can install extensions to meet the website requirement and activate additional PHP functionality. To do so, perform the following steps:
Go to Web-server settings → PHP → Extensions.
Select an extension and click Install. If the desired extension is not available, you can install it manually.
You can Enable or Disable an extension. By default, all the extensions that the administrator enabled are active on the user side.
You cannot change the status of the extensions that are included in the PHP package build. In the Properties column, you can see the icon .Only the ISPmanager administrator can enable the extensions that depend on or affect other extensions.