URL-safe Base64

urlsafeB64.php

<?php

/**
 * Decode a string with URL-safe Base64.
 *
 * @param string $input A Base64 encoded string
 *
 * @return string A decoded string
 */
function urlsafeB64Decode($input)
{
    $remainder = strlen($input) % 4;
    if ($remainder) {
        $padlen = 4 - $remainder;
        $input .= str_repeat('=', $padlen);
    }
    return base64_decode(strtr($input, '-_', '+/'));
}

/**
 * Encode a string with URL-safe Base64.
 *
 * @param string $input The string you want encoded
 *
 * @return string The base64 encode of what you passed in
 */
function urlsafeB64Encode($input)
{
    return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
}

if (! function_exists('url_safe_base64_encode')) {
    function url_safe_base64_encode ($data) {
        return str_replace(array('+','/', '='),array('-','_', ''), base64_encode($data));
    }
}

if (! function_exists('url_safe_base64_decode')) {
    function url_safe_base64_decode ($data) {
        $base_64 = str_replace(array('-','_'),array('+','/'), $data);
        return base64_decode($base_64);
    }
}

if (! function_exists('base64_to_url_safe_base64')) {
    function base64_to_url_safe_base64 ($data) {
        return str_replace(array('+', '/', '='),array('-', '_', ''), $data);
    }
}

if (! function_exists('url_safe_base64_to_base64')) {
    function url_safe_base64_to_base64 ($data) {
        return str_replace(array('-','_'),array('+','/'), $data);
    }
}