if(file_exists($filepath)){
	        $size = filesize($filepath);
	        $unim = array("Bytes","KB","MB","GB","TB","PB");
	        $count=0;

	        while($size >= 1024 ){
	                $count++;
	                $size = $size/1024;
	        }
	        $size = round($size,2);
	        echo $size.$unim[$count];

	}else{
	        echo "not exists";
	}
}