I recently ran into a weird issue while working on a Laravel project on Windows using Laragon.
Everything was working fine until I tried to import a database through phpMyAdmin.
Instead of an SQL error, phpMyAdmin simply returned: No useful message.
Just HTTP
500.
My SQL file was around 97 MB, so at first I thought it was probably a PHP upload limit issue.
It wasn't that simple.
Here is how I debugged it.
1.
Check which PHP configuration is actually running From Laragon Terminal: Then I checked the important error settings: My output was: One small Laragon/Git Bash issue I also found was: returned: Because of that, commands like: sometimes returned: Using directly avoids that problem.
2.
Check the PHP error log My PHP error log was: I reproduced the import error and checked it: Nothing useful appeared.
That was an important clue.
3.
Make sure browser PHP and CLI PHP use the same php.ini I created a temporary file: Then opened it through the browser.
Important values were: My PHP limits were already high enough: So the 97 MB SQL file should have been allowed by PHP.
4.
Check Apache logs I located the Apache error log with: In my case: Then: Still nothing useful.
So I checked the access log: And finally found: So the failure was definitely happening during the phpMyAdmin import request.
5.
Check Laragon's FastCGI request limit Because Laragon was using , I searched its config: That led me to: Inside I found: The important one was: That is only around 77.5 MiB.
My SQL file was: Output: So PHP allowed , but Apache FastCGI only allowed around .
That mismatch can cause the request to fail before phpMyAdmin can properly process the upload.
6.
Increase Open: Change: to: That gives FastCGI a 512 MiB request limit.
Then: and retry the import.
7.
If the next error is “Maximum execution time of 300 seconds exceeded” After fixing the request-size limit, I hit another possible bottleneck: If you see this, do not edit .
That is only where the timeout becomes visible.
Instead, open: and add: If the file contains a closing , add the line before it.
Then: and retry the import.
Setting to removes phpMyAdmin's execution-time limit for operations such as large imports.
In my debugging session, this was the latest issue I reached.
I had not yet fully confirmed the final import after changing this setting, so treat this as the next configuration to verify if your import dies exactly at 300 seconds.
The main lesson When phpMyAdmin gives you a generic while importing a large SQL file on Laragon, don't only check: Also check these two layers: and: In my case, the debugging path was basically: That is the part that can easily be missed: PHP may allow a large upload while Apache/FastCGI or phpMyAdmin still blocks it for a completely different reason.
And if you create a temporary file while debugging, delete it afterward.