src/RpkUtils/Sysinfo/Server.php
public static function memory() 
    {
        $memory         = new \StdClass();
        $memory->real   = new \StdClass();
        $memory->swap   = new \StdClass();
        
        if(false !== ($data = @file('/proc/meminfo'))){
            
            $data = implode("", $data);
            
            //processing and stuff aka preg matching
            preg_match_all("/MemTotal\s{0,}\:+\s{0,}([\d\.]+).+?MemFree\s{0,}\:+\s{0,}([\d\.]+).+?Cached\s{0,}\:+\s{0,}([\d\.]+).+?SwapTotal\s{0,}\:+\s{0,}([\d\.]+).+?SwapFree\s{0,}\:+\s{0,}([\d\.]+)/s", $data, $meminfo);
    	    preg_match_all("/Buffers\s{0,}\:+\s{0,}([\d\.]+)/s", $data, $buffers);
    	    
    	    $memory->total          = $meminfo[1][0]*1024;
    	    $memory->free           = $meminfo[2][0]*1024;
    	    $memory->used           = $memory->total - $memory->free;
	        $memory->cached         = $meminfo[3][0]*1024;
    	    $memory->buffers        = $buffers[1][0]*1024;
    	    
    	    $memory->real->used     = $memory->total - $memory->free - $memory->cached - $memory->buffers;
    	    $memory->real->free     = $memory->total - $memory->real->used;
    	    
    	    $memory->swap->free     = $meminfo[5][0]*1024;
    	    $memory->swap->used     = $meminfo[4][0]*1024 - $memory->swap->free;
    	    
        }

        return $memory;
        
    }
public static function memory() 
    {
        $memory         = new \StdClass();
        $memory->real   = new \StdClass();
        $memory->swap   = new \StdClass();
        
        if(false !== ($data = @file('/proc/meminfo'))){
            
            $data = implode("", $data);
            
            //processing and stuff aka preg matching
            preg_match_all("/MemTotal\s{0,}\:+\s{0,}([\d\.]+).+?MemFree\s{0,}\:+\s{0,}([\d\.]+).+?Cached\s{0,}\:+\s{0,}([\d\.]+).+?SwapTotal\s{0,}\:+\s{0,}([\d\.]+).+?SwapFree\s{0,}\:+\s{0,}([\d\.]+)/s", $data, $meminfo);
    	    preg_match_all("/Buffers\s{0,}\:+\s{0,}([\d\.]+)/s", $data, $buffers);
    	    
    	    $memory->total          = $meminfo[1][0]*1024;
    	    $memory->free           = $meminfo[2][0]*1024;
    	    $memory->used           = $memory->total - $memory->free;
	        $memory->cached         = $meminfo[3][0]*1024;
    	    $memory->buffers        = $buffers[1][0]*1024;
    	    
    	    $memory->real->used     = $memory->total - $memory->free - $memory->cached - $memory->buffers;
    	    $memory->real->free     = $memory->total - $memory->real->used;
    	    
    	    $memory->swap->free     = $meminfo[5][0]*1024;
    	    $memory->swap->used     = $meminfo[4][0]*1024 - $memory->swap->free;
    	    
        }

        return $memory;
        
    }
Server memory information
@return \StdClass
->total
->used
->free
->cached
->buffers
->real->used
->real->free
->swapo->used
->swapo->free
@important: all data is in bytes