本文共 1531 字，大约阅读时间需要 5 分钟。
#
~~~
function base58_encode($string)
{
$alphabet = '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ';
$base = strlen($alphabet);
if (is_string($string) === false) {
return false;
}
if (strlen($string) === 0) {
return '';
}
$bytes = array_values(unpack('C*', $string));
$decimal = $bytes[0];
for ($i = 1, $l = count($bytes); $i < $l; $i++) {
$decimal = bcmul($decimal, 256);
$decimal = bcadd($decimal, $bytes[$i]);
}
$output = '';
while ($decimal >= $base) {
$div = bcdiv($decimal, $base, 0);
$mod = bcmod($decimal, $base);
$output .= $alphabet[$mod];
$decimal = $div;
}
if ($decimal > 0) {
$output .= $alphabet[$decimal];
}
$output = strrev($output);
foreach ($bytes as $byte) {
if ($byte === 0) {
$output = $alphabet[0] . $output;
continue;
}
break;
}
return (string) $output;
}
function base58_decode($base58)
{
if (is_string($base58) === false) {
return false;
}
if (strlen($base58) === 0) {
return '';
}
$indexes = array_flip(str_split($this->alphabet));
$chars = str_split($base58);
foreach ($chars as $char) {
if (isset($indexes[$char]) === false) {
return false;
}
}
$decimal = $indexes[$chars[0]];
for ($i = 1, $l = count($chars); $i < $l; $i++) {
$decimal = bcmul($decimal, $this->base);
$decimal = bcadd($decimal, $indexes[$chars[$i]]);
}
$output = '';
while ($decimal > 0) {
$byte = bcmod($decimal, 256);
$output = pack('C', $byte) . $output;
$decimal = bcdiv($decimal, 256, 0);
}
foreach ($chars as $char) {
if ($indexes[$char] === 0) {
$output = "\x00" . $output;
continue;
}
break;
}
return $output;
}
~~~
转载地址：https://blog.csdn.net/weixin_33758343/article/details/116361144 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！
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