I am programming for PHP in Eclipse 2020-09 on Linux Mint, but whenever I try to use a default class or function, I get an error class not found or undefined function.
If I start the program from the shell by php -f myprog.php, it does work fine. So, it must have to do with my Eclipse configuration or my XDebug configuration. Unfortunately, I don't find how and where to compare the settings shell vs. Eclipse/XDebug.
Can anyone give me a hint what and where to check? Thank you in advance!