priv_key to wif (bitcoin) 2

<form method="post">
<input type="text" name="key" value="" />
<input type="submit" name="submit" value="Go" />
</form>
<?php
define("ADDRESSVERSION","80"); //this is a hex byte
if($_POST)
{
    echo hash160ToAddress(trim(strtoupper($_POST['key'])));
}

function hash160ToAddress($hash160,$addressversion=null)
{
        if($addressversion === null)
        {
            $addressversion = ADDRESSVERSION;
        }
        $hash160=$addressversion.$hash160;
        $check=pack("H*" , $hash160);
        $check=hash("sha256",hash("sha256",$check,true));
        $check=substr($check,0,8);
        $hash160=strtoupper($hash160.$check);
        return encodeBase58($hash160);
}

function decodeHex($hex)
{
        $hex=strtoupper($hex);
        $chars="0123456789ABCDEF";
        $return="0";
        for($i=0;$i<strlen($hex);$i++)
        {
                $current=(string)strpos($chars,$hex[$i]);
                $return=(string)bcmul($return,"16",0);
                $return=(string)bcadd($return,$current,0);
        }
        return $return;
}

function encodeHex($dec)
{
        $chars="0123456789ABCDEF";
        $return="";
        while (bccomp($dec,0)==1)
        {
                $dv=(string)bcdiv($dec,"16",0);
                $rem=(integer)bcmod($dec,"16");
                $dec=$dv;
                $return=$return.$chars[$rem];
        }
        return strrev($return);
}

function decodeBase58($base58)
{
        $origbase58=$base58;

        $chars="123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
        $return="0";
        for($i=0;$i<strlen($base58);$i++)
        {
                $current=(string)strpos($chars,$base58[$i]);
                $return=(string)bcmul($return,"58",0);
                $return=(string)bcadd($return,$current,0);
        }

        $return=encodeHex($return);

        //leading zeros
        for($i=0;$i<strlen($origbase58)&&$origbase58[$i]=="1";$i++)
        {
                $return="00".$return;
        }

        if(strlen($return)%2!=0)
        {
                $return="0".$return;
        }

        return $return;
}

function encodeBase58($hex)
{
        if(strlen($hex)%2!=0)
        {
                die("encodeBase58: uneven number of hex characters");
        }
        $orighex=$hex;

        $chars="123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
        $hex=decodeHex($hex);
        $return="";
        while (bccomp($hex,0)==1)
        {
                $dv=(string)bcdiv($hex,"58",0);
                $rem=(integer)bcmod($hex,"58");
                $hex=$dv;
                $return=$return.$chars[$rem];
        }
        $return=strrev($return);

        //leading zeros
        for($i=0;$i<strlen($orighex)&&substr($orighex,$i,2)=="00";$i+=2)
        {
                $return="1".$return;
        }

        return $return;
}



function addressToHash160($addr)
{
        $addr=decodeBase58($addr);
        $addr=substr($addr,2,strlen($addr)-10);
        return $addr;
}

function checkAddress($addr,$addressversion=ADDRESSVERSION)
{
        $addr=decodeBase58($addr);
        if(strlen($addr)!=50)
        {
                return false;
        }
        $version=substr($addr,0,2);
        if(hexdec($version)>hexdec($addressversion))
        {
                return false;
        }
        $check=substr($addr,0,strlen($addr)-8);
        $check=pack("H*" , $check);
        $check=strtoupper(hash("sha256",hash("sha256",$check,true)));
        $check=substr($check,0,8);
        return $check==substr($addr,strlen($addr)-8);
}

function hash160($data)
{
        $data=pack("H*" , $data);
        return strtoupper(hash("ripemd160",hash("sha256",$data,true)));
}

function pubKeyToAddress($pubkey)
{
        return hash160ToAddress(hash160($pubkey));
}

function remove0x($string)
{
        if(substr($string,0,2)=="0x"||substr($string,0,2)=="0X")
        {
                $string=substr($string,2);
        }
        return $string;
}