Array differences
| From: | Ashley M. Kirchner | Date: | Wed, 14 Apr 2010 05:01:38 +0000 |
| Subject: | Array differences | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-304078@lists.php.net to get a copy of this message | ||
I have the following scenario:
$array1 = array("12", "34", "56", "78",
"90");
$array2 = array("12", "23", "56", "78",
"89");
$result = array_diff($array1, $array2);
print_r($result);
This returns:
Array
(
[1] => 34
[4] => 90
)
However what I really want is a two-way comparison. I want elements that
don't exist in either to be returned:
34 and 90 because they don't exist in $array2, AND 23 and 89 because they
don't exist in $array1. So, is that a two step process of first doing an
array_diff($array1, $array2) then reverse it by doing array_diff($array2,
$array1) and merge/unique the results? Any caveats with that?
$array1 = array("12", "34", "56", "78",
"90");
$array2 = array("12", "23", "56", "78",
"89");
$diff1 = array_diff($array1, $array2);
$diff2 = array_diff($array2, $array1);
$result = array_unique(array_merge($diff1, $diff2));
print_r($result);
-- A