转换文件大小单（PHP代码函数）

//转换文件大小单（PHP代码函数）//代码来源：Monxin ./config/functions.phpfunction formatSize($size){           //$size=sprintf("%u ",$size);           if($size==0){return( "0 Bytes ");}           $sizename=array(" Bytes"," KB"," MB"," GB"," TB"," PB"," EB"," ZB"," YB");         return round($size/pow(1024,($i=floor(log($size,1024)))),2).$sizename[$i];   }