xdebug not working after install and set php settings

I installed xdebug on php7.3 using pecl install xdebug

When I add these settings to /etc/php/7.3/apache2/php.ini and reload apache the page fails and says no data sent to server.

#xdebug.var_display_max_children=-1
#xdebug.var_display_max_data=-1
#zend_extension="/usr/lib/php/20180731/xdebug.so"
#xdebug.remote_enable=1
#xdebug.remote_handler=dbgp
#xdebug.remote_mode=req
#xdebug.remote_host=127.0.0.1
#xdebug.remote_port=9000
#xdebug.halt_level=E_WARNING|E_NOTICE|E_USER_WARNING|E_USER_NOTICE
#xdebug.scream=1

Not sure why its not working.

from xdebug not working after install and set php settings