Req #61982 [Opn->Dup]: Provide encode/decode functions for RFC 4648 "base64url" format

Edit report at https://bugs.php.net/bug.php?id=61982&edit=1 ID: 61982 Updated by: nikic@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: ------------------------------------------------------------------------ [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 ); } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=61982&edit=1