Xdebug Update: September 2023
In this monthly update I explain what happened with Xdebug development in the past month. These are normally published on the first Tuesday on or after the 5th of each month.
Patreon and GitHub supporters will get it earlier, around the first of each month.
You can become a patron or support me through GitHub Sponsors. I am currently 37% towards my $2,500 per month goal, which is set to allow continued maintenance of Xdebug.
If you are leading a team or company, then it is also possible to support Xdebug through a subscription.
In the last month, I spend around 28 hours on Xdebug, with 25 hours funded.
Towards Xdebug 3.3
In September I released a first alpha release of Xdebug 3.3 so that people trying out PHP 8.3 Release Candidates have a compatible Xdebug to test with.
This quickly followed by a second alpha version due to issues with the PECL website. Instead of mangling UTF-8 characters, it stopped accepting them altogether.
I have reintroduced the xdebug.collect_params setting, which I had removed in Xdebug 3.0. Instead of the setting, Xdebug would just always collect functions' and methods' arguments while tracing. However, some users were suggesting that this created too much information which was not always needed. With the setting restored, you can now again hide these function arguments from trace files.
As frameworks are getting more complicated, they are more likely to hit Xdebug's default xdebug.max_nesting_level limit of 256. In Xdebug 3.3, this will now be 512.
The maximum nesting level setting is now less important that it was all these years ago. The PHP engine now uses stack in a more economic way. This feature unfortunately is negated when extensions override PHP's internal execution method, which is what Xdebug has to do to capture function calls for tracing, profiling, and certain breakpoints.
In PHP 8.1 a new Observer API was added, which would allow extensions to observe user-land function calls without having to override the internal execution method. This means that the stack is used more sparingly again. It also would allow for these extensions to work better with opcache enabled.
I am currently in the process of investigating whether Xdebug can make use of this Observer API as well, while maintaining all its functionality and without BC breaks. I will keep you updated in the next monthly update.
Beyond this, I will continue to work on the features and issues on the 3.3 roadmap, without any guarantees these tickets will be implemented.
Xdebug Videos
I have published one new videos in the last month:
Let me know what you'd like to see!
You can find all previous videos on my YouTube channel.
Business Supporter Scheme and Funding
In the last month, no new business supporters signed up.
Besides business support, I also maintain a Patreon page, a profile on GitHub sponsors, as well as an OpenCollective organisation.
Xdebug Cloud
Xdebug Cloud is the Proxy As A Service platform to allow for debugging in more scenarios, where it is hard, or impossible, to have Xdebug make a connection to the IDE. It is continuing to operate as Beta release.
Packages start at £49/month, and I have recently introduced a package for larger companies. This has a larger initial set of tokens, and discounted extra tokens.
If you want to be kept up to date with Xdebug Cloud, please sign up to the mailinglist, which I will use to send out an update not more than once a month.
Life Line
TIL that Kingfishers can hover just like hummingbird. I'll hopefully have some reasonable shots after I've gone through my nearly thousand shots today...
I hiked 9.8km in 3h40m47s
Updated a restaurant
Updated a vacant business
I walked 7.1km in 1h16m56s
I walked 3.9km in 45m56s
I walked 1.1km in 10m47s
I think this was my favourite photo of the set that I took. It's not at maximum coverage, but it does have a sun spot group (4508) just on the cusp of the terminator.
#eclipse #eclipse2026 #SolarEclipse #London #Astronomy #AstroPhotography #Photography
No totality here in London, but still had a great evening out in the local park and taking some snaps.
I did have a nice Solar Filter that I made for my lens, and had many conversations with people from different backgrounds. Kids loves to look through my filter after I was done (ran out of battery power).
More photos later...
I walked 0.9km in 9m28s
I walked 1.2km in 19m05s
Merged pull request #1100
Fixed issue #2267: Application slow when debugger is not listening on…
I walked 4.7km in 48m18s
I walked 3.0km in 1h10m24s
Is there somebody who runs PHP on native windows (with Xdebug) and can run a simple script for me?
It must be in a file (`test.php`):
```
<?php
echo microtime(true), "\n";
xdebug_connect_to_client();
echo microtime(true), "\n";
```And run like:
php -dxdebug.log_level=11 -dxdebug.log=c:\temp\xdebug-i.log -dxdebug.client_host=localhost -dxdebug.client_port=9111 -dxdebug.mode=debug c:\temp\test.php
With the port 9111 not open.
Would love to see the output and log file (in a DM).
I walked 5.5km in 55m06s
@harry_wood This is this list of 100 Go-mistakes that I was talking about: https://100go.co/
Updated a crossing
I walked 2.1km in 20m08s
Enjoying my afternoon and evening out at Lords for some cricket!
I walked 3.2km in 38m54s
I walked 9.1km in 1h34m28s
Updated a gate
Updated a bakery shop




Shortlink
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