如何回显NLS_LANG变量shell_exec

Question

shell_exec("export NLS_LANG=AMERICAN_AMERICA.UTF8");
$xa = shell_exec("echo $NLS_LANG");
echo $xa;

This code not working, where problems ?

Answer 1

Because both are running as different processes in different environments.

   php
    |___shell 1
    |___shell 2

You can manipulate the environment with putenv.

putenv("NLS_LANG=AMERICAN_AMERICA.UTF8");
$xa = shell_exec("echo \$NLS_LANG");
echo $xa;

Hope this helps.