// Win CPU

$wmi = new COM('WinMgmts:\\\\.');

$cpus = $wmi->InstancesOf('Win32_Processor');

$cpuload = 0;

$cpu_count = 0;

foreach ($cpus as $key => $cpu) {

  $cpuload += $cpu->LoadPercentage;

  $cpu_count++;

}

// WIN MEM

$res = $wmi->ExecQuery('SELECT FreePhysicalMemory,FreeVirtualMemory,TotalSwapSpaceSize,TotalVirtualMemorySize,TotalVisibleMemorySize FROM Win32_OperatingSystem');

$mem = $res->ItemIndex(0);

$memtotal = round($mem->TotalVisibleMemorySize / 1000000,2);

$memavailable = round($mem->FreePhysicalMemory / 1000000,2);

$memused = round($memtotal-$memavailable,2);

// WIN CONNECTIONS

$connections = shell_exec('netstat -nt | findstr :80 | findstr ESTABLISHED | find /C /V ""'); 

$totalconnections = shell_exec('netstat -nt | findstr :80 | find /C /V ""');

$operating_system = PHP_OS_FAMILY;

if ($operating_system === 'Windows') {

// Linux CPU

$load = sys_getloadavg();

$cpuload = $load[0];

// Linux MEM

$free = shell_exec('free');

$free = (string)trim($free);

$free_arr = explode("\n", $free);

$mem = explode(" ", $free_arr[1]);

$mem = array_filter($mem, function($value) { return ($value !== null && $value !== false && $value !== ''); }); // removes nulls from array

$mem = array_merge($mem); // puts arrays back to [0],[1],[2] after 

$memtotal = round($mem[1] / 1000000,2);

$memused = round($mem[2] / 1000000,2);

$memfree = round($mem[3] / 1000000,2);

$memshared = round($mem[4] / 1000000,2);

$memcached = round($mem[5] / 1000000,2);

$memavailable = round($mem[6] / 1000000,2);

// Linux Connections

$connections = `netstat -ntu | grep :80 | grep ESTABLISHED | grep -v LISTEN | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -rn | grep -v 127.0.0.1 | wc -l`; 

$totalconnections = `netstat -ntu | grep :80 | grep -v LISTEN | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -rn | grep -v 127.0.0.1 | wc -l`;

$diskfree = round(disk_free_space(".") / 1000000000);

$disktotal = round(disk_total_space(".") / 1000000000);

$diskused = round($disktotal - $diskfree);

$diskusage = round($diskused/$disktotal*100);