From: tiago dot freire at gmail dot com Operating system: Linux PHP version: 5.0.4 PHP Bug Type: Feature/Change Request Bug description: base64_encode alternate dictionary (RFC 3548)
Description: ------------ Per RFC 3548 (http://www.ietf.org/rfc/rfc3548.txt) , there is an alternate alphabet for base64 encoding and decoding,addressing the issue of unfriendliness of the '/' to filesystems and URLs. <snip> Table 2: The "URL and Filename safe" Base 64 Alphabet Value Encoding Value Encoding Value Encoding Value Encoding 0 A 17 R 34 i 51 z 1 B 18 S 35 j 52 0 2 C 19 T 36 k 53 1 3 D 20 U 37 l 54 2 4 E 21 V 38 m 55 3 5 F 22 W 39 n 56 4 6 G 23 X 40 o 57 5 7 H 24 Y 41 p 58 6 8 I 25 Z 42 q 59 7 9 J 26 a 43 r 60 8 10 K 27 b 44 s 61 9 11 L 28 c 45 t 62 - (minus) 12 M 29 d 46 u 63 _ (understrike) 13 N 30 e 47 v 14 O 31 f 48 w (pad) = 15 P 32 g 49 x 16 Q 33 h 50 y </snip> As you can see, the only difference is that the last two characters (+ and /) are substituted by '-' (minus) and '_' (underscore). It should be trivial for base64_encode to have a flag so that the message can be encoded with the alternate alphabet. since there is no clash between alphabet, olny the substitution of two characters for other chars which were not part of it, base64_decode should recognize both without the need of an additional parameter. My suggestion is to add an optional flag as a second parameter to tell base64_encode that it should use the URL-friendly encoding. Its absence will indicate the traditional behaviour. -- Edit bug report at http://bugs.php.net/?id=33650&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33650&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=33650&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=33650&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=33650&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=33650&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=33650&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=33650&r=needscript Try newer version: http://bugs.php.net/fix.php?id=33650&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=33650&r=support Expected behavior: http://bugs.php.net/fix.php?id=33650&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=33650&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=33650&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=33650&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33650&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=33650&r=dst IIS Stability: http://bugs.php.net/fix.php?id=33650&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=33650&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=33650&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=33650&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=33650&r=mysqlcfg
