From: rattray at purdue dot edu
Operating system: windows and unix
PHP version: 4.3.4
PHP Bug Type: *Programming Data Structures
Bug description: isset() gives false positives for array subkeys
Description:
------------
using isset() to detect the existence of array subkeys give a false
positive. Also, trying to print the content of said non-existing keys
gives the first character of the parent key!
Reproduce code:
---------------
$aArray = array();
$aArray["key"] = "value";
print("<PRE>".print_r($aArray, true)."</PRE>");
if (isset($aArray))
print("Array exists<BR>");
else print("Array does not exist.<BR>");
if (isset($aArray["key"]))
print("Array[key] exists, value = '".$aArray["key"]."'<BR>");
else print("Array[key] does not exist.<BR>");
if (isset($aArray["key"]["subkey"]))
print("Array[key][subkey] exists, value =
'".$aArray["key"]["subkey"]."'<BR>");
else print("Array[key][subkey] does not exist.<BR>");
Expected result:
----------------
Array
(
[key] => value
)
Array exists
Array[key] exists, value = 'value'
Array[key][subkey] does not exist
Actual result:
--------------
Array
(
[key] => value
)
Array exists
Array[key] exists, value = 'value'
Array[key][subkey] exists, value = 'v'
--
Edit bug report at http://bugs.php.net/?id=27677&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27677&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27677&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27677&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27677&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27677&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27677&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27677&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27677&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27677&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27677&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27677&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27677&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27677&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27677&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27677&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27677&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27677&r=float
