Question

I want to add data to an array dynamically. How can I do that? Example

$arr1 = [
    'aaa',
    'bbb',
    'ccc',
];
// How can I now add another value?

$arr2 = [
    'A' => 'aaa',
    'B' => 'bbb',
    'C' => 'ccc',
];
// How can I now add a D?

Answer 1

There are quite a few ways to work with dynamic arrays in PHP.
Initialise an array:

$array = array();

Add to an array:

$array[] = "item"; // for your $arr1 
$array[$key] = "item"; // for your $arr2
array_push($array, "item", "another item");

Remove from an array:

$item = array_pop($array);
$item = array_shift($array);
unset($array[$key]);

There are plenty more ways, these are just some examples.