!!! WARNING !!!
Warning: Changing the PHP version can lead to irreversible consequences and jeopardize the accessibility of your website. Please check BEFORE making the change whether the website is compatible with the desired PHP version.!!! WARNING !!!
In the web hosting menu, click on [Domains] in the left menu bar to open the menu for domains & subdomains.

Click on the [ACTIONS] button next to the desired (sub)domain and select [PHP settings] from the context menu.

Note that there is no way to manage the default PHP version and each subdomain must be edited separately.

The max_memory_limit cannot be adjusted and applies to the selected PHP version.
!!! WARNING !!!
Warning: Changing the PHP version can lead to irreversible consequences and jeopardize the accessibility of your website. Please check BEFORE making the change whether the website is compatible with the desired PHP version.!!! WARNING !!!
You can customise the default PHP version by first clicking on the [Web Hosting] (1) menu item in the Controlpanel and then on the [PHP Settings] (2) sub-item. The currently set default version is displayed at the top, followed by a list of available versions. Click on [Set as default] (3) next to the desired version to change the setting. Under the [Settings] link (4) next to the respective version, you can adjust further parameters, such as the PHPsession_cache of memcached, filesystem or redis.
You can also access that setting directly under this link.


Select [Display webspace content] to find the link [Advanced settings »] (1) next to the text field for the folder. Click on it to set the PHP version (2) and make any other settings you require.
If the PHP version of a subdomain differs from the specified default version, you can find it in the control panel by clicking on [Web Hosting] and then on [PHP Settings]. The corresponding subdomain and the associated PHP version are displayed at the bottom of the page. Here too, the PHP max_memory_limit cannot be adjusted and applies to the selected PHP version.