Question

I have associative array which looks like this.

$arr = array(
   "FIRST" => 1,
   "SECOND => 2,
   "FOURTH => 4
);

The idea is how to “add” data to this array depending of expression.
Here is what I’m trying to do:

if(3 == 3) {
  $str = array("THIRD" => 3);
}

 $arr = array(
       "FIRST" => 1,
       "SECOND => 2,
       $str,
       "FOURTH => 4
    );

The problem is that the code above add $str as an array in $arr, not like “THIRD” => 3

Answer 1

What about http://php.net/manual/en/function.array-merge.php

Then you can merge the two arrays:

if(3 == 3) {
  $str = array("THIRD" => 3);
}

 $arr = array(
       "FIRST" => 1,
       "SECOND => 2,
       "FOURTH => 4
    );

$arr = array_merge($arr,$str);

But you can also do it on another way:

$arr = array(
       "FIRST" => 1,
       "SECOND => 2,
       "FOURTH => 4
    );

if(3 == 3) {
  $arr["THIRD"]=3;
}