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Gerard
12 years ago
To make base64_encode encode a URL safe string compatible with .net HttpServerUtility.UrlTokenEncode function use this:

<?php
url_safe_base64_encode
($string)
{
#First base64 encode
$data = base64_encode($string);

#Base64 strings can end in several = chars. These need to be translated into a number
$no_of_eq = substr_count($data, "=");
$data = str_replace("=", "", $data);
$data = $data.$no_of_eq;

#Then replace all non-url safe characters
$data = str_replace(array('+','/'),array('-','_'),$data);
return
$data;
}
?>

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