Saving a Base64 string to disk as a binary using PHP

Question

As a \"look under the covers\" tutorial for myself I am building a PHP script to gather emails from a POP3 mailbox. While attempting to make use of binary attachments I am

Answer 1

function base64_decode_file($data)
{
    if(preg_match('/^data\:([a-zA-Z]+\/[a-zA-Z]+);base64\,([a-zA-Z0-9\+\/]+\=*)$/', $data, $matches)) {
        return [
                'mime' => $matches[1],
                'data' => base64_decode($matches[2]),
        ];
    }
    return false;
}