os/Windows.php
public static function getTotalMemory()
		{
			$wmi = Windows::getInstance();

			foreach ($wmi->ExecQuery("SELECT TotalPhysicalMemory FROM Win32_ComputerSystem") as $mem) {
				return $mem->TotalPhysicalMemory;
			}

			return NULL;
		}
public static function getTotalMemory()
		{
			$wmi = Windows::getInstance();

			foreach ($wmi->ExecQuery("SELECT TotalPhysicalMemory FROM Win32_ComputerSystem") as $mem) {
				return $mem->TotalPhysicalMemory;
			}

			return NULL;
		}
Gets total physical memory

@return array|null