TYPO3 Core

Right now, we tend to not implement the first part. Since "<" is part of an HTML tag, allowing it could create security issues. The second part of the issue description seems valid :)

Hi Peter,

I just tested this on latest main with the following form definition:

renderingOptions:
  submitButtonLabel: Submit
type: Form
identifier: test91340
label: 'test 91340'
prototypeName: standard
renderables:
  -
    renderingOptions:
      previousButtonLabel: 'Previous step'
      nextButtonLabel: 'Next step'
    type: Page
    identifier: page-1
    label: Step
    renderables:
      -
        defaultValue: ''
        validators:
          -
            identifier: EmailAddress
          -
            identifier: RegularExpression
            options:
              regularExpression: '/^.+@.+(?<!@qq.com)$/g'
        type: Email
        identifier: email-1
        label: 'Email address'

With this configuration, on form submit I get the following exception:

#1476107295 TYPO3\CMS\Core\Error\Exception
PHP Warning: preg_match(): Unknown modifier 'g' in /var/www/html/typo3/sysext/extbase/Classes/Validation/Validator/RegularExpressionValidator.php line 42

This is correct, since the regex should be

-regularExpression: '/^.+@.+(?<!@qq.com)$/g'
+regularExpression: '/^.+@.+(?<!@qq\.com)$/'

When using the modified regex, I get

You must enter a valid value. Please refer to the description of this field.

when entering foo@qq.com as e-mail address, which is expected behavior.

Additionally, I can successfully submit the form when using a different e-mail address, e.g. foo@bar.com.

That's why I'd say this issue is already resolved. Can you confirm?

Hi guys,

thx a lot for taking care of my issue. I've tested the regular expression as suggested by Elias and that worked fine with TYPO3 11.5.12.
So I would say that this issue can be closed. Thx again!