Regex to allow alphanumeric and dot

Question

Hi I have a variable in a Silex route and we only allow alphanumeric values ``` ->assert('hash','\w+') ``` I would like to also allow a dot in the variable, but my efforts at editing this regex have failed. Help greatly appreciated, thanks!

Accepted Answer

Try using a character class (`[…]`), like this:

```
[\w.]+
```

For example:

```
->assert('hash','[\w.]+')
```

Regex to allow alphanumeric and dot

Solution

Problem