[PHP-BUG] Req #70928 [NEW]: base_convert should distinguish capital letter

From:             tony at prettysimplegames dot com
Operating system: All
PHP version:      Irrelevant
Package:          PHP Language Specification
Bug Type:         Feature/Change Request
Bug description:base_convert should distinguish capital letter

Description:
------------
---
From manual page: http://www.php.net/function.base-convert
---

base_convert function in the documentation is displayed with a capital
letter. The fact that base_convert accept to transform a capital letter
and convert it to the same letter in lower case is confusing and can
cause serious problem.

If you base_convert from a base A to a base B, and then convert from
base B to base A the original string is not the same.


In the ext/standard/math.c file the total base is without capital
letters:
PHPAPI zend_string * _php_math_longtobase(zval *arg, int base)
{
	static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";




Test script:
---------------
$original_string = "A1";

$string_in_base_two = base_convert($original_string, 32, 2);
$string_in_base_thirty_two = base_convert($string_in_base_two, 2, 32);

var_dump($string_in_base_two);
var_dump($string_in_base_thirty_two);
var_dump($original_string == $string_in_base_thirty_two);

Expected result:
----------------
- At least update the documentation and add the dictionary
"0123456789abcdefghijklmnopqrstuvwxyz" and remove the example with the
capital letter.

- At best throw an error/return false when the base_convert function is
used with invalid range: 

base_convert("A1", 32, 2) must return false in my opinion.

Actual result:
--------------
base_convert("A1", 32, 2) return the same thing as base_convert("a1",
32, 2)

-- 
Edit bug report at https://bugs.php.net/bug.php?id=70928&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=70928&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=70928&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=70928&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=70928&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=70928&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=70928&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=70928&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=70928&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=70928&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=70928&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=70928&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=70928&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=70928&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70928&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=70928&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=70928&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=70928&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=70928&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=70928&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=70928&r=mysqlcfg