Having hash map (get by key) like in java in PHP?

Question

Well I've thought of having ArrayList in PHP because it was extremely useful in PHP, and saving a lot of time.

I thought it'd be cool to have in PHP, so I did make an arrayList class in PHP:

Class ArrayList
{
    public $arrayList;

    function __construct()
    {
        $this->arrayList = array();
    }

    public function add($element)
    {
        $this->arrayList[] = $element;
    }

    public function remove($index)
    {
        if (is_numeric($index)) {
            unset($this->arrayList[$index]);
        }
    }

    public function get($index)
    {
        return $this->arrayList[$index];
    }
}

Now, I noticed I need an list type more of a hashmap, so I can get items by keys. Let's say I need to get mysql db name, so Ill just do $data->hashmap->get("db_name"). This will return the database name value.

Is there a way to do this?

Jon Gauthier · Accepted Answer · 2013-08-24 16:44:37Z

4

PHP has built-in data types that do what you want:

A "hashmap" is an associative array
An "ArrayList" is simply an array

Example:

$my_hash_map = array('x' => 5, 'y' => 10);
$my_hash_map['x'] + $my_hash_map['y'] // => 15

$my_array_list = array();
$my_array_list[] = 5;
$my_array_list[0] // => 5

See Arrays in the PHP documentation.

edited Aug 24, 2013 at 16:44

answered Aug 24, 2013 at 16:30

Jon Gauthier

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Sergiu Paraschiv · Accepted Answer · 2013-08-24 16:30:06Z

0

In PHP arrays can have string keys. Also you could use stdClass.

answered Aug 24, 2013 at 16:30

Sergiu Paraschiv

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