Symfony routing allows commas where dots are configurated

Question

I have a route configuration:

    <route id="some_route" path="/special/path/{some_strings}">
        <default key="_controller">SpecialControllerBundle:Default:index</default>
        <requirement key="some_strings">1.1|1.2|1.3</requirement>
    </route>

By specifications allow only 1.1, 1.2, 1.3 strings are valid as some_strings parameter.

So I call myhost/special/path/1.1 - and it works just fine.

But for some reason I can call myhost/special/path/1,1 (notice the comma) - and somehow it matches the requirements and passes data to the controller.

If I call some illegal requirement myhost/special/path/2.3 it gives 404 as it should.

Symfony 3.4 dependencies are used.

Answer 1

<requirement key="some_strings">1.1|1.2|1.3</requirement>

These are not strings that get matched literally, but as regular expressions. . in a regular expression means any arbitrary character. If you don’t want this special meaning, then you need to escape the dot, by prefixing it with a backslash.

<requirement key="some_strings">1\.1|1\.2|1\.3</requirement>