php exec with sc query retuning no output

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Running the php script below in a web page and the array never has anything in it.

Does anyone have any ideas as to what I coudl be doing wrong?

Many thanks

$command = 'psexec -accepteula  \\\server-u xxxxxxxx -p xxxxxxxx cmd.exe /c sc query "Dnscache" |     findstr "RUNNING"';
echo $command;
exec($command,$output,$return);
echo $output;
echo "yes";
echo $return;

print_r( $output);

asked 45 secs ago

user3796815

1