PHP执行Python但没有输出

Question

I want to run a Python script from PHP via system with some arguments. My PHP doesn't throw any errors and $retval is 1. But I don't see any generated output file $f1 in the current directory. Is there a chance the output file goes somewhere else?

$outp1 = system("python plain.py {$url1} {$f1}", $retval);

Answer 1

Found the answer now, I needed to set permissions to 777 so that apache can write to the folder.