How to insert a new key value pair in array in php?

Question

I\'ve an array as follows named $test_package_data. For the reference I\'m printing first two elements of it:

Array
(
    [0] => Array
               


        

Answer 1

To add:

$arr["key"] = "value";

Then simply return $arr

Can't return directly like this way return $arr["key"] = "value";