From: jestrada at webmedia dot com dot mx
Operating system: Win
PHP version: 5.0.4
PHP Bug Type: Arrays related
Bug description: array_diff returns empty in some cases
Description:
------------
the default function array_diff returns empty records in some cases. i
have two arrays
1) (1),(3),(7),(9)
2) (2),(3)
it must return r) (1), (7), (9), but it returns (), (), (9)
i made a similar function by my self, and i had the same problem, then i
review the code, and i found a line, a simple counter:
if ($l_existe == false){
<b>$arr_result[$i]</b> = $st_valorComparado;
$i_result++;
}
the var $i must be $i_result, that's why the array contains in somecases,
in which the number of found elements is less than the max elements, the
empty recs, because $arr_result[$i] is putting the value of
$st_valorComparado in another index higher than the max of elements
found.
Maybe the code of the original funcion have a similar error.
Reproduce code:
---------------
function fcn_array_diff($arr_comparado, $arr_compararEn){
$i_maxComparado = count($arr_comparado);
$i_maxCompararEn = count($arr_compararEn);
$arr_result[0] = "";
$i_result = 0;
for ($i=0; $i<$i_maxComparado; $i++){
$st_valorComparado = chop($arr_comparado[$i]);
$l_existe = false;
for ($j=0; $j<$i_maxCompararEn; $j++){
$st_valorCompararEn = chop($arr_compararEn[$j]);
if ($st_valorComparado == $st_valorCompararEn){
$l_existe = true;
break;
}
}
<b>if ($l_existe == false){
$arr_result[$i_result] = $st_valorComparado;
$i_result++;
}</b>
}
return $arr_result;
}
--
Edit bug report at http://bugs.php.net/?id=33887&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33887&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=33887&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=33887&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=33887&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=33887&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=33887&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=33887&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=33887&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=33887&r=support
Expected behavior: http://bugs.php.net/fix.php?id=33887&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=33887&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=33887&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=33887&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33887&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=33887&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=33887&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=33887&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=33887&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=33887&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=33887&r=mysqlcfg
