What potential issues may arise when using the shell_exec() function under Windows IIS for executing commands in PHP?

One potential issue when using the shell_exec() function under Windows IIS is that the function may not be enabled or allowed by the server configuration, leading to the command not being executed. To solve this issue, you can use the exec() function instead, which is more commonly supported on Windows servers.

$output = exec('your_command_here');
echo $output;