Pushing new combined array to PHP array - php

Question

I have the following code. This fetches fields from an SQL table ("db") and prepares them for use in a datatable ("dt").
$columns = array(
array( 'db' => 'Author', 'dt' => 'authors'),
array( 'db' => 'Editor', 'dt' => 'editor')
);
It prints this
[{"authors":"John Smith; Paul Phillips","editors":"Robert Fox"},...]
Now I would like to push a third array (people) to columns, one that combines the previous two arrays, but without replacing them, like
[{"authors":"John Smith; Paul Phillips","editors":"Robert Fox","people": "John Smith: Paul Phillips; Robert Fox"},...]

Answer 1

If its just an array that you try to add to $columns,
Use array_merge()
$columns = array(
array( 'db' => 'Author', 'dt' => 'authors'),
array( 'db' => 'Editor', 'dt' => 'editor')
);
$person = array( 'db' => 'Person', 'dt' => 'person');
$newArray = array_merge($columns, $person);
The outcome should look like this:
array(4) {
[0]=>
array(2) {
["db"]=>
string(6) "Author"
["dt"]=>
string(7) "authors"
}
[1]=>
array(2) {
["db"]=>
string(6) "Editor"
["dt"]=>
string(6) "editor"
}
[2]=>
array(2) {
["db"]=>
string(6) "Person"
["dt"]=>
string(6) "person"
}
}