php variables in Language Injection

Maybe, I'm missing something but once phpstorm decides that I am using a language injection, it doesn't seem to recognize $vars in strings.

For example, if I have the following:

function findperson($name) {
     $query = "select id from persons where name = '$name'";
     $id = getfromdb($query);
}

It doesn't seem to realize that $name is a php variable, doesn't provide completion, and doesn't provide syntax highlighting for the string.

Interestingly, as soon as I use the variable $name in the argument list does change the syntax highlighting to show that the variable is used.|

Idas?