Xdebug stopped working, where do I look for errors?

Question

I installed Xdebug and all was fine, until suddenly it stopped working. phpinfo() gives a nice XDebug output with all variables.

php -m | grep deb

also gives twice XDebug (for Zend and PHP), so again looks just fine. My php.ini has these lines:

zend_extension=/usr/lib/php5/20090626/xdebug.so
;extension=xdebug.so
xdebug.remote_host=localhost
xdebug.remote_enable=on
xdebug.remote_port=9001
xdebug.remote_handler=dbgp
xdebug.remote_connect_back=1

And yet, when running this code with should check XDebug (from Netbeans docs) it's just stuck. So No IDE is working with XDebug.

<?php
$address = '127.0.0.1';
$port = 9001;
$sock = socket_create(AF_INET, SOCK_STREAM, 0);
socket_bind($sock, $address, $port) or die('Unable to bind');
socket_listen($sock);
$client = socket_accept($sock);
echo "connection established: $client";
socket_close($client);
socket_close($sock);

Also, according to XDebug installation, I went twice throught the steps. What is wrong with my config? Thanks.

even after adding xdebug.remote_log="/tmp/xdebug.log" and restarting Apache2, and running an app the log is empty... — valk, Apr 02 '12 at 05:50

score 17 · Accepted Answer · edited May 05 '17 at 21:35

At the end, left with only two solutions - to reinstall the Ubuntu OS or to install a new VM especially for xdebug, I'm going for the second one. Funny thing is, everything was working according to the "RTM" (f=freaking). One thing that I couldn't figure out is how to read the logs for XDebug in order to understand where the real problem is.

UPDATE

After some struggling, I deleted every single line related to xdebug from every php.ini that I had. And moved these lines to /etc/php5/conf.d/xdebug.ini. Restarted Apache, and then PHPStorm, and it works. P.S. in the middle, I tried to install xdebug with pecl, from github, and the standard Ubuntu version. I think the one that I compiled is currently working. And.. the log gets updated as well.

;xdebug configuration
zend_extension = /usr/lib/php5/20090626/xdebug.so
xdebug.remote_host = 127.0.0.1
xdebug.remote_enable = 1
xdebug.remote_port = 9000
xdebug.remote_handler = dbgp
xdebug.remote_mode = req
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger=1
xdebug.remote_autostart=1
xdebug.idekey=PHPSTORM
xdebug.remote_log="/tmp/xdebug.log"

score 12 · Answer 2 · answered May 06 '14 at 14:52

12

On your server, try this command:

$ netstat -anp | grep CLOSE_WAIT

Any :9000 entries will give you XDebug troubles; consider kill -9 <pid>.

answered May 06 '14 at 14:52

Derek Illchuk

5,638
1
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2

For those not completely familiar with linux, the PID on ubuntu for me using this command was the last column: 3131/apache2 PID = 3131 – espradley Jul 21 '17 at 16:31
I know it's an old post , but I had to use sudo with netstat to see the . There is already a warning : (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) – Sofien Joulak Dec 01 '22 at 20:19

score 2 · Answer 3 · answered Sep 13 '12 at 18:46

I had this problem too on Ubuntu after updating php. For me, turning on html errors in php.ini got xdebug with Netbeans to work again ...

sudo vi /etc/php5/apache2/php.ini
display_errors = On
html_errors = On

And restart apache:

sudo /etc/init.d/apache2 restart

http://ubuntuforums.org/showpost.php?p=9592364&postcount=14

score 1 · Answer 4 · answered Jan 08 '16 at 02:10

I checked my

netstat -anp

output and found out that there were number of open sockets (in XDebug port range) by master process on my remote machine [running xDebug].

Killing the 'master' process solved the problem for me.

Seemed like a port overrun situation for me. Thought the information might be useful to some.

score 0 · Answer 5 · answered Feb 18 '19 at 08:42

0

Check are you putting breakpoints to the right file. Find first file where script enters (front controller). On symfony there can be more than one for example.

answered Feb 18 '19 at 08:42

Darius.V

737
1
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score 0 · Answer 6 · answered Feb 06 '21 at 11:03

In my case after update xdebug to 3 version I just put/set php.ini config

error_reporting=E_ALL
display_startup_errors=1
display_errors=1

and then command php -v show all warnings and errors. In my case:

Xdebug: [Config] The setting 'xdebug.remote_enable' has been renamed, see the upgrading guide at https://xdebug.org/docs/upgrade_guide#changed-xdebug.remote_enable (See: https://xdebug.org/docs/errors#CFG-C-CHANGED)

score 0 · Answer 7 · answered Apr 02 '12 at 08:18

check port is not occupied, check netbeans is configured to listen to that port(i see you have 9001, 9000 is default usually)also when i debug with eclipse i have to "terminate and relaunch" the debug session every now and then since it stops working, never under stood why, i suspect some sort of expired debug session

Xdebug stopped working, where do I look for errors?

7 Answers7

UPDATE