Contributing Advent 8: The magic __FILE__ constant
This issue came up in the #xdebug IRC channel on Freenode:
18:25 <user> no magic constants for PHP ? 18:27 <user> __FILE__ evaluates to "xdebug://debug-eval"
The user noticed this issue in the Eclipse expression evaluator. A similar issue is also described a few times on the internet:
With the hint in comment 2 in the first URL, I answered the report in an answer on StackOverflow (the third URL). I am repeating this answer (with some modifications) here:
The output you get is not incorrect. __FILE__ is a special constant that gets evaluated at parser time. In fact, even though it looks like a constant, it is really not. When the PHP script gets compiled, it would really read something like this:
// test.php
<?php
"test.php";
?>
even though the script source was:
// test.php
<?php
__FILE__;
?>
This means that after parsing, there is no such "constant" __FILE__ at all, as it has already been replaced.
This means that if you evaluate __FILE__ in an IDE, through DBGp's eval command with eval -- __FILE__ it can not return you a filename that is represented through the __FILE__ "constant". Instead, it uses the filename for the current context which is xdebug eval or in later versions, xdebug://debug-eval.
In essence, it's the same as doing this:
php -r 'eval("__FILE__;");'
Which also outputs:
Command line code(1) : eval()'d code
Xdebug looks for this sort of output format, and changes it to xdebug://debug-eval so that it can actually debug into eval'ed code.
__FILE__ works as expected in "normal" PHP source code, as can be proven with this snippet:
<?php $currentFilename = __FILE__; ?>
And after it has been assigned to a variable, you can evaluate $currentFilename in your IDE.
Life Line
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...
#london #eclipse2026 #eclipse #photography
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
Updated a convenience shop
I walked 8.1km in 1h32m18s
I walked 5.6km in 59m13s
Updated a restaurant and a cafe; Confirmed 2 restaurants and a cafe
I walked 6.7km in 1h8m27s
I walked 4.7km in 50m02s
I got myself a sheet of Sun-safe filter material, and McGuyvered a pop-up filter for my lens.
The first attempt sort of worked, but I didn't get the filter 100% straight. Luckily I have more material.
But this is sort of my first attempt, and a few sunspots are clearly visible on the right of the image.
Warning: Never look at the Sun without protection!
#Sun #Photography #Astronomy #AstroPhotography
Shortlink
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