# array_merge_clobber

- Thread: https://externals.io/message/4650
- Original archive: https://news-web.php.net/php.internals/4650
- Started by Lukas Smith on 2003-10-02T11:05:59+00:00
- Messages: 1
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## #4650 — Lukas Smith — 2003-10-02T11:05:59+00:00

URL: https://externals.io/message/4650#4650

Hi,

Ok here is another patch written by my new intern (Ralf Willenbacher)
which adds array_merge_clobber to the set of array functions. After a
bit of pondering we think that array_merge_replace might be a better
name for it. But that is just sugar on top once we agree on the
principal.

Note: array_merge_clobber behaves a bit different than array_merge and
array_merge_recursive and different than array addition.

array array_merge_clobber ( array array1, array array2 [, array ...])

Essentially it does the following:
It copies the first array and then overwrites any values that have the
same key (numeric or string) or appends any values that have a key that
is not yet defined by working recursively over the subsequent arrays.

So values in array 2 overwrite values in array 1 that have the same key
(numeric or string). And values in array 3 overwrite values in array 2
that have the same key (numeric or string). Etc.

You can find the path here:
http://www.backendmedia.com/php_patches/mergeclobber.patch

Here is a little test script (with the implementation I made in PHP):
http://www.backendmedia.com/php_patches/array_merge_clobber.php

While working on this patch we found a bug in array_merge_recursive. But
I will submit this in a separate mail.

Regards,
Lukas Smith
smith@backendmedia.com 
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