String problems.. echo random garbage?
I have a strange code appearing randomly on the web (its not in the code). If I add an enter or something on the code, the strange symbols shift to other strange places, like this image
I cloned code on purpose, and the bug only appear around line 1230. No matter how many times I repeat the code that generate the string, the bug appear in the same line... and all other lines are OK.
If I go to the code, there's no special characters. Is there a known bug for string concatenation? I'm using
PHP 7.4.2 (cli) (built: Feb 5 2020 16:50:55) ( NTS ) for ubuntu 18.04
NOTE: If I keep pressing F5 to refresh, the strange code CHANGE... and sometimes disappear