if the private key is a hex string, try following the below functions.
(apologies to the author, i don't remember where i found this code)
define("ADDRESSVERSION","00"); //this is a hex byte
function decodeHex($hex)
{
$hex=strtoupper($hex);
$chars="0123456789ABCDEF";
$return="0";
for($i=0;$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 {
$current=(string)strpos($chars,$base58[$i]);
$return=(string)bcmul($return,"58",0);
$return=(string)bcadd($return,$current,0);
}
$return=encodeHex($return);
//leading zeros
for($i=0;$i {
$return="00".$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 {
$return="1".$return;
}
return $return;
}
function hash160ToAddress($hash160,$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 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;
}
