Array merge recursive with an variable index

Question

I need to merge secuentially different arrays.

Let's say I have 3 and 2 arrays I need to merge all together. Currently I am using this:

$ppjson_data= json_encode(array_merge_recursive($ppposts[0][0],$ppposts[0][1],$ppposts[0][2],$ppposts[1][0],$ppposts[1][1]));

This works great.

Now the problem is that the number of arrays I may need to merge is not constant. There are $x and $y arrays to merge recursively, so how would you do it?

$x=5;
$y=10;
for ($i=0;$i<$x+1) {
  for ($j=0;$j<$y+1) {    
    $ppjson_data=json_encode(array_merge_recursive(...));
  }
}

Thank you for your help.

AbraCadaver · Accepted Answer · 2017-10-02 19:08:47Z

1

Call array_merge_recursive with the sub-arrays of your array as arguments using call_user_func_array:

$ppjson_data = json_encode(call_user_func_array('array_merge_recursive', $ppposts));

That creates an arra, in JSON it will be surrounded in []. If you want an object instead {} then cast it with (object):

$ppjson_data = json_encode((object)call_user_func_array('array_merge_recursive', $ppposts));

edited Oct 2, 2017 at 19:08

answered Oct 2, 2017 at 17:40

AbraCadaver

79.2k7 gold badges75 silver badges91 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Javi Over a year ago

Almost done, but the resulting json starts with "[" and finishes with "]". Any chances to avoid that?

Javi Over a year ago

I prefer the previous one and then: $ppjson_data=str_replace(array('[', ']'), '', $ppjson_data)

AbraCadaver Over a year ago

Depends on what you need, that might not be valid JSON. Check jsonlint.com

Javi Over a year ago

In my case, it is valid. Thank you!

Collectives™ on Stack Overflow

Array merge recursive with an variable index

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related