PhpStorm auto-complete support for unknown object properties managed by Pimple?

Question

I have the following code in an application powered by Silex:

$uknownObj->unkownRef

$uknownObj being a dependency injection container.

I know that unkownRef is of instance MyCoolObj.

Now how can I tell IntelliJ / PhpStorm to actually help me with autocomplete of this said object?

Answer 1

Simply assign unkownRef to a variable and provide annotation like this.

/** @var MyCoolObj $obj */
$obj = $uknownObj->unkownRef;

Answer 2

You can either use phpdoc comments as suggested by xmoex, or assert type with instanceof: