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