Fatal error on form validation

@alexio101 can you please confirm that you’re using version 5.8.1 of Contact Form 7 and version 4.1.0 of Contact Form 7 – Dynamic Text Extension, please? And also steps to reproduce your error exactly.

I haven’t been able to reproduce your error yet, the line of code that is being flagged in your fatal error is this one:

$raw_value = $contact_form->prop($components[0])[$components[1]];

In my test case, the value of $components[0] is mail and the value of $components[1] is sender (because I’m using a DTX email field as my sending email address) so calling $contact_form->prop("mail") gets the mail property from the form object and then it retrieves the sender attribute. In my test case, $raw_value successfully retrieved the value I set as [_site_title] <[dtx_email]> as the sender my mail template.

However, the error you posted is implying that the mail object is a string and therefore breaking when trying to get the sender property (the indexes in $components was already validated on line 179). I can add validation to ensure that the value of $contact_form->prop($components[0]) is an array type before I attempt to access the attribute, but it has me concerned that there’s something else broken in your instance because it just shouldn’t be a string.

I can see in CF7’s release notes for 5.8.1 that there are changes to the configuration validator and they note that some are backward-incompatible so that could be the issue as well.

I’ll keep looking.