Question

I’ve build a class for a login system. I’m using a function to generate a salt key on 128 bits. But when I run this function on the server ( GoDaddy Servers ) it tells me that thr round() has a wrong number of arguments. Though I’ve tested it a few times on local host and everything is fine.

Could you take a look at it and tell me what is wrong with it ?

function encrypt($str, $len=null) {
 return (!empty($len)) ?
    hash('sha512', str_pad($str, (strlen($str) + $len),substr(hash('sha512', $str),round(strlen($str)/3, 0,PHP_ROUND_HALF_UP),($len - strlen($str))),STR_PAD_BOTH)) :
    hash('sha512', substr($str,round(strlen($str)/3, 0,PHP_ROUND_HALF_UP), 16));
}

Answer 1

They are probably using an older version of php. The third parameter of round() was not added until php 5.3.0.

http://php.net/manual/en/function.round.php

Edit:

if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
    round($number, 0, PHP_ROUND_HALF_UP);
}else{
    if($number % 1 == 0.5){
        $number+=0.1;
    }
    round($number, 0);
}