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Bug #45415 function "base_convert" bugs
Submitted: 2008-07-02 11:54 UTC Modified: 2008-07-15 01:46 UTC
From: aurorakay at yeah dot net Assigned:
Status: Not a bug Package: Math related
PHP Version: 5.2.6 OS: Linux 2.6.23-tuxonice-r10-
Private report: No CVE-ID: None
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 [2008-07-02 11:54 UTC] aurorakay at yeah dot net 
Description:
------------
the same data,but at e.g.1,I convert hex to dec. The value is my wish, at e.g.2 I convert dec to hex. The value isn't my wish.


Reproduce code:
---------------
/*e.g.1*/
$flag=1<<29;
$mark="0x808080";
$mark=base_convert($mark,16,10);
$flag=$flag | $mark;
$t=(base_convert($flag,10,2));
/* this will print "string(30) "100000100000001000000010000000" */
var_dump($t);

/*e.g.2*/
$flag1=1<<29;
$mark1="0x808080";
$flag1=base_convert($flag1,10,16);
$flag1=$flag1 | $mark1;
$t1=(base_convert($flag1,16,2));
/* this will print "string(26) "10100000001000000010000000" */
var_dump($t1); 

Expected result:
----------------
/*e.g.1*/ is my wish.

Actual result:
--------------
e.g.1 print "string(30) "100000100000001000000010000000";
e.g.2 print "string(26) "10100000001000000010000000"

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 [2008-07-02 11:59 UTC] jani@php.net 
Exactly what is the expected and what is the actual results?
 [2008-07-04 11:58 UTC] aurorakay at yeah dot net 
Expected result: e.g.1;
Actual result: e.g.1;

example.1 's result is my want. but in examle.2,I want get the example.1's result.but actual, it is  "string(26) "10100000001000000010000000"  I want get "string(30) "100000100000001000000010000000" in example.2;

Excuse my poor english = =
 [2008-07-15 01:46 UTC] jani@php.net 
On manual page http://www.php.net/manual/en/language.operators.bitwise.php you can find this comment:

"If both the left- and right-hand parameters are strings, the bitwise operator will operate on the characters' ASCII values."

In your first example they're not both strings but in the second they are..hence the wrong result. This is not a bug -> bogus.
 
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