Edit report at https://bugs.php.net/bug.php?id=61982&edit=1
ID: 61982
Updated by: ni...@php.net
Reported by: nospam at vyznev dot net
Summary: Provide encode/decode functions for RFC 4648
"base64url" format
-Status: Open
+Status: Duplicate
Type: Feature/Change Request
Package: *General Issues
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
This is a duplicate of https://bugs.php.net/bug.php?id=33650.
Previous Comments:
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[2012-05-09 14:31:05] nospam at vyznev dot net
Description:
------------
Including Base64-encoded data in URLs and file names is a commonly encountered
task. The PHP base64_encode() function is not suitable for this, since its
output may encode the characters "+" (which has special meaning in URL query
parameters) and "/" (which is used as a path separator in file names and URL
paths).
RFC 4648 (http://tools.ietf.org/html/rfc4648) defines, in section 5, a standard
variant of Base64 encoding, called "base64url", for this purpose. It differs
from the usual "base64" format in that the characters "+" and "/" are replaced
with "-" and "_" respectively, and that the use of the padding character "=" is
optional and not usually recommended.
I would like to suggest that functions for encoding and decoding data in this
format be provided in PHP alongside the existing base64_encode() and
base64_decode() functions. Although such functions can be relatively easily
implemented in pure PHP code based on the existing Base64 encoding functions, a
built-in implementation would presumably be both more efficient and more likely
to be user correctly by script authors.
A sample PHP implementation of the proposed functions (which could be included
in the documentation for backward compatibility purposes) is included below:
function base64url_encode( $data, $pad = false ) {
$base64 = strtr( base64_encode( $data ), '+/', '-_' );
return ( $pad ? $base64 : rtrim( $base64, '=' ) );
}
function base64url_decode( $base64, $strict = false ) {
return base64_decode( strtr( $base64, '-_+/', '+/-_' ), $strict );
}
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Edit this bug report at https://bugs.php.net/bug.php?id=61982&edit=1
