Grafik Menu:

sudo /opt/lampp/manager-linux-x64.run

per terminal
/opt/lampp/xampp


configdatei zum wechsel der php version 
/opt/lampp/etc/extra/httpd-xampp.conf


xdebug.so:

dann passende version
runtenladen , 
readme.rst öffnen und nach anweisung install. 
Wenn erfolgreich ist das script kompeliert zu finden in : 
 /opt/lampp/lib/php/extensions/no-debug-non-zts-20180731  

und es folgt :
                                                                    |
  |   INSTALLATION INSTRUCTIONS                                          |
  |   =========================                                          |
  |                                                                      |
  |   See https://xdebug.org/install.php#configure-php for instructions  |
  |   on how to enable Xdebug for PHP.                                   |
  |                                                                      |
  |   Documentation is available online as well:                         |
  |   - A list of all settings:  https://xdebug.org/docs-settings.php    |
  |   - A list of all functions: https://xdebug.org/docs-functions.php   |
  |   - Profiling instructions:  https://xdebug.org/docs-profiling2.php  |
  |   - Remote debugging:        https://xdebug.org/docs-debugger.php    |
  |                                                                      |
  |                                                                      |
  |   NOTE: Please disregard the message                                 |
  |       You should add "extension=xdebug.so" to php.ini                |
  |   that is emitted by the PECL installer. This does not work for      |
  |   Xdebug.                                                            |

dann in opt/lampp/etc/php.ini
 zend_extension=/opt/lampp/lib/php/extensions/no-debug-non-zts-20180731/xdebug.so
einfügen. 

überprüfen mit phpinfo()

Zend logoThis program makes use of the Zend Scripting Language Engine:
Zend Engine v3.3.12, Copyright (c) 1998-2018 Zend Technologies
    with Xdebug v2.9.0, Copyright (c) 2002-2019, by Derick Rethans

  |