Как декодировать Base64 PHP
base64_decode('base64-string-goes-here');
Helpful Hamerkop
base64_decode('base64-string-goes-here');function base58_decode($num) {
$alphabet = '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ';
$len = strlen($num);
$decoded = 0;
$multi = 1;
for ($i = $len - 1; $i >= 0; $i--) {
$decoded += $multi * strpos($alphabet, $num[$i]);
$multi = $multi * strlen($alphabet);
}
return $decoded;
}