从windows（PHP）中的exec（）输出？

Question

not seem to getting the outputs from exec() command in PHP, OS: Windows XP

here's the code used: exec("echo %username%",$output);

using print_r($output) which returns 1;

Answer 1

echo is not a program on Windows that you can call. It is a feature provided specifically by the command processor (i.e. cmd.exe).

If you want the username in this manner don't start up a shell. Use getenv instead.

(If for some reason you wanted to use echo you would need to do cmd.exe /c echo Whatever. Also note that checking the return code as well as the output may be useful)