How to generate a Token in Symfony 3.4

Question

I have my symfony 2.7 updatet to symfony 3.4. I used in Symfony 2.7 the function generateToken() to create a token for a file upload task. I found just information about Securely Generating Random Values for symfony 3.4. But how I can integrate it?

can I use the following Statement?

 return bin2hex(random_bytes(32));

Answer 1

I know this might be late but hopefuly it will help somone else because there is no function out-of-the-box from symfony that can be used to generate tokens.

so what i did when i run into this problem is that i used the same token generator that is used by FOSUserBundle wich is this:

public function generateToken()
{
    return rtrim(strtr(base64_encode(random_bytes(32)), '+/', '-_'), '=');
}

https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Util/TokenGenerator.php

and as you can see it uses the random_bytes() function that is recommended in the official documentation of symfony combined with the php function base64_encode() wich is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies as explained in the official php documentation and they are using exactiy this example.