Простой конфиг для xdebug чтобы писал xdebug.log

[Xdebug]
zend_extension = "/usr/lib64/php/modules/xdebug.so"
xdebug.remote_enable = on
xdebug.remote_log = "/var/log/xdebug.log"

xdebug.remote_autostart = on
xdebug.remote_handler = dbgp
xdebug.remote_port = 9001
xdebug.remote_server = localhost
xdebug.remote_mode = req

; Most users won't want a hard coded idekey. More on this later.
xdebug.idekey = netbeans-xdebug
output_buffering = off