Curly braced variables in strings break class scanning

[adawolfa]

Version: 4.0.0

Bug Description

Whenever there's a curly braced variable in a string ("{$var}"), $level in scanPhp() is increased twice. As a result, any class within the same file following such token is ignored.

Steps To Reproduce

<?php

print "Hello {$World}!";

class Bar // This class won't be found.
{
    function fn()
    {
    }
}

Issue is not present in v3.