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Request #23816 modified array_merge_recursive: array_merge_clobber
Submitted: 2003-05-26 13:18 UTC Modified: 2014-12-30 10:41 UTC
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: pacha_shevaev at mail dot ru Assigned:
Status: No Feedback Package: *General Issues
PHP Version: * OS: Any
Private report: No CVE-ID: None
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 [2003-05-26 13:18 UTC] pacha_shevaev at mail dot ru
It's not probably a bug report but a suggestion.
Guys please could you make built-in function array_merge_clobber that WOULDN'T append duplicate key/values like array_merge_recursive does?

There's an example of such function in the php manual, in the array_merge_recursive section:

function array_merge_clobber($a1,$a2) {
if(!is_array($a1) || !is_array($a2)) return false;
$newarray = $a1;
foreach ($a2 as $key => $val) {
        if (is_array($val) && is_array($newarray[$key])) {
$newarray[$key] = array_merge_clobber($newarray[$key],$val);
} else {
$newarray[$key] = $val;
return $newarray;

Our application heavily depends on this function and it takes about 40% of overall script execution(very large and nested arrays)! I think many developers would agree to have this function interbally implemented.

Maybe it's not the right place...but i have no idea where else i could ask about it...


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 [2014-04-16 18:27 UTC]
-Status: Open +Status: Feedback -Package: Feature/Change Request +Package: *General Issues -Operating System: win2000 +Operating System: Any -PHP Version: 4.3.1 +PHP Version: *
 [2014-04-16 18:27 UTC]
If I understand you correctly, the `+` operator can be used:

$array1 = array(0 => 'zero_a', 2 => 'two_a', 3 => 'three_a');
$array2 = array(1 => 'one_b', 3 => 'three_b', 4 => 'four_b');
$result = $array1 + $array2;
 [2014-12-30 10:41 UTC] php-bugs at lists dot php dot net
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