Creating my own autocomplete plugin / rule?

Not sure the corrent name for it, but this is what I would like to achieve:
I type this code:

foreach($array_values[space]

PhpStorm kicks in after the space, notices that my variable ends with "s", and then autocompletes my foreach statement like below:

foreach($array_values as $array_value_id => $array_value){
    [cursor here]

}

Would this be possible in PhpStorm as is (ie: somewhere in settings), or would it require a plugin?

Thanks heaps!
Dave