<?php

class HTML {

    /*
    * Characters that will pass:
    * a-z
    * A-Z
    * 0-9
    * .
    * _
    * -
    */
    function sanatizeString($string)
    {
        return preg_replace("/[^a-zA-Z0-9._\-]+/", "", $string);
    }

    function renderSize($byte)
    {
        if($byte < 1024) {
            $result = round($byte, 2). ' Byte';
        }elseif($byte < pow(1024, 2)) {
            $result = round($byte/1024, 2).' KB';
        }elseif($byte >= pow(1024, 2) and $byte < pow(1024, 3)) {
            $result = round($byte/pow(1024, 2), 2).' MB';
        }elseif($byte >= pow(1024, 3) and $byte < pow(1024, 4)) {
            $result = round($byte/pow(1024, 3), 2).' GB';
        }elseif($byte >= pow(1024, 4) and $byte < pow(1024, 5)) {
            $result = round($byte/pow(1024, 4), 2).' TB';
        }elseif($byte >= pow(1024, 5) and $byte < pow(1024, 6)) {
            $result = round($byte/pow(1024, 5), 2).' PB';
        }elseif($byte >= pow(1024, 6) and $byte < pow(1024, 7)) {
            $result = round($byte/pow(1024, 6), 2).' EB';
        }
    
            return $result;
    }

}