From: tomas_matousek at hotmail dot com
Operating system: WinXP
PHP version: 5.0.0RC3
PHP Bug Type: Arrays related
Bug description: extract function, EXTR_PREFIX_SAME option prefixes empty strings
Description:
------------
The extract() function with EXTR_PREFIX_SAME option specified prefixes
variable name which is an empty string, although such variable doesn't
exists in the scope where extract is called.
Manual says:
"EXTR_PREFIX_SAME
If there is a collision, prefix the variable name with prefix."
And this is not true for an empty string.
A bug is possibly here (!!!):
-- array.c ----------------------------
case EXTR_PREFIX_SAME:
if (!var_exists)
smart_str_appendl(&final_name, var_name, var_name_len);
/* break omitted intentionally */
case EXTR_PREFIX_ALL:
if (final_name.len == 0 !!!) { ...
break;
---------------------------------------
Reproduce code:
---------------
function f()
{
extract(array("" => 1),EXTR_PREFIX_SAME,"prefix");
print_r(get_defined_vars());
{
f();
Expected result:
----------------
Array
(
)
Actual result:
--------------
Array
(
[prefix_] => 1
)
--
Edit bug report at http://bugs.php.net/?id=29038&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=29038&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=29038&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=29038&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=29038&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=29038&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=29038&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=29038&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=29038&r=support
Expected behavior: http://bugs.php.net/fix.php?id=29038&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=29038&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=29038&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=29038&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=29038&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=29038&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=29038&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=29038&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=29038&r=float
