It is not possible to open phpinfo() page in Plesk > Domains > example.com > PHP Settings with:
DOMDocument::loadHTML(): Argument #1 ($source) must not be empty
Manually created phpinfo() scripts are working properly.
A custom PHP handler installed from 3rd-party or OS repositories is used for the domain.
A Plesk bug with ID PPPM-13986.
Until the bug is fixed, use the following workaround:
Go to Domains > example.com > File Manager.
Click New > Create File and name it
phpinfo.php. Click OK.
Open the file
phpinfo.phpand add the following content to it:
To view the
phpinfo()page open the
http://example.com/phpinfo.phpURL in a browser.