Symfony Validator for Alphanumeric

Question

I am trying to only allow alphanumeric fields for a first name using:

patientFirstName:
                 - NotBlank: ~
                 - Regex: 
                       pattern: "/[^a-z_\-0-9]/i"
                       htmlPattern: "^[a-zA-Z\-0-9]+$"
                       message: Name must be alphanumeric

However it is still allowing characters like "&&&". Is my regex wrong?

Answer 1

Symfony 3

If you do not want to use regex, you can use @Assert\Type for validator alphanumeric

You can see it in the symfony doc here

@Assert\Type(type="alnum")

Answer 2

You are missing ^, $ and + (just like your html pattern): /^[a-z\-0-9]+$/i

If you do not add them, the regex will match any string if it contains at least one alphanumeric character.