How to merge an array with duplicate keys with array merge?

Question

$cat1=array( "_id"=>new MongoId("562918fc2bad8c345d000029"),"name"=>"Category Two");


$cat2=array("_id"=>new MongoId("562918e62bad8c445d000029"),
"name"=>"Category One");

$categories=array();

$categories=array_merge($cat1,$cat2);

print_r($categories);

but it returns as follow

 array("_id"=>new MongoId("562918e62bad8c445d000029"),
"name"=>"Category One")

I tried array_unique too

array_unique(array_merge($cat1,$cat2))

But result was same as above
I know its not merging both array because both have same array keys. Instead its merging second into a first array, But how can I merge both arrays so it will look like following.

array(array( "_id"=>new MongoId("562918fc2bad8c345d000029"),"name"=>"Category Two"),array("_id"=>new MongoId("562918e62bad8c445d000029"),
    "name"=>"Category One"));

Have a look at live code http://viper-7.com/Oaa4zL

what result you want? – Ashish Choudhary Oct 22 '15 at 17:36 — Ashish Choudhary, Oct 22 '15 at 17:36
It should be merged like the last one.. I have mentioned it – phpnerd Oct 22 '15 at 17:41 — phpnerd, Oct 22 '15 at 17:41

score 1 · Answer 1 · answered Oct 22 '15 at 17:44

1

You could do it manually and add them both to an array:

print_r(array(
    $cat1,
    $cat2
));

answered Oct 22 '15 at 17:44

The fourth bird

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55
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score 1 · Accepted Answer · answered Oct 22 '15 at 17:48

1

If you don't know how many categories will be there, then you can simply push them to the array.

$allCat = array();
$allCat[] = $cat1;
$allCat[] = $cat2;
.
.
.
$allCat[] = $catN;

print_r($allCat);

answered Oct 22 '15 at 17:48

Ashish Choudhary

2,004
1
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1

Yes it is. It pushes category array to allCat array. – Ashish Choudhary Oct 22 '15 at 18:01

score 1 · Answer 3 · answered Oct 22 '15 at 17:51

No need to merge them:

$categories[] = array("_id"=>new MongoId("562918fc2bad8c345d000029"),
                      "name"=>"Category Two");

$categories[] = array("_id"=>new MongoId("562918e62bad8c445d000029"),
                      "name"=>"Category One");

How to merge an array with duplicate keys with array merge?

3 Answers3