System not returning last line of output?

Question

linux

Hello.
When executed in a script

$result_load = system("/usr/bin/wget -i $from -nH -r --cut-dirs=2 --directory-prefix=$to -nc");

does not return the last line of the output.
var_dump($result_load);
or if

$result_load = system("/usr/bin/wget -i $from -nH -r --cut-dirs=2 --directory-prefix=$to -nc", $output);
var_dump($output);

always returns string(0) "" .
But judging by the documentation , this should not be the case.
Wget works as it should, but it needs a type check if the result is != null, then show a message that everything is fine.

Answer 1

system returns output from stdout, while wget writes to stderr.
One could redirect output from stderr to stdout like so:
but the interpreter escapes special characters.
Worth a look in the direction popen