Maximum string length passed through ajax javascript / php?

Question

PHP

Hello!

I send logs about strange errors from the client side - via ajax requests.
Everything works fine, from the javascript side it shows that all data is sent (POST).
Only a part of them, about 2000 characters, reaches the server, but no longer gives ...
Set max_post_size & max_upload_size equal to 100M - did not help
What could be the problem? Why is the data truncated, perhaps it's in the Apache or PHP settings?

Answer 1

Does sending and processing fit into the script execution limit?
Is there enough memory (memory_limit)?
nginx server or apache?
Are you passing all the data through one variable or through many small ones?
Look at file_get_contents('php://input') there is the entire request before processing

Answer 2

Mmm, EMNP, the Apache, if the body length was exceeded, would have cursed with a mistake.
Is the data exactly in the body being sent and not in the query string? Judging by the trimmed length, this looks more like a GET constraint.