Autocomplete for unknown properties

Is it possible to PhpStorm to autocomplete unknown properties? Here is sample code:

class Fields {
    public function __construct($data) {
        foreach ($data AS $d) {
            $propName=$d['id'];
            $this->$propName=$d['value'];
        }
    }
}

$data=[
    ['id'=>'myId', 'value'=>'Name'],
    ['id'=>'second', 'value'=>'Second]
];

$fields=new Fields($data);

$fields->second;//comes from autocpmplete

I want 'second' or 'myId' property to be autocompleted. Is it possible?

Solution

Is it possible to PhpStorm to autocomplete unknown properties?

Yes and No -- it depends on how you plan to use it.

If you want to have it absolute dynamic (e.g. the same Fields class but in one file $fields variable (instance of that Fields class) will have one set of fields and in another completely different) -- then answer is No.

Otherwise it's possible to declare non-existing property via @property tag (see detailed link) in PHPDoc comment for that class.

/**
 * @property string $abc Optional description here
 */
class Fields {
...

Now every instance of Fields will have abc property offered in completion.

With that in mind you can have all actual code/logic in Fields class and then declare specific fields in child classes:

/**
 * @property string $first
 */
class FirstClassFields extends Fields {
...
}

/**
 * @property string $second
 */
class SecondClassFields extends Fields {
...
}