When clicking on any of the Channel Fields created by CartThrob, I receive the following error.

I uninstalled pt_fieldpack but the same issue. Wondering if I need to uninstall and reinstall CartThrob.

Fatal error: Class PT_Fieldtype contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (EE_Fieldtype::display_field) in /var/www/vhosts/deathdirections.com/httpdocs/system/expressionengine/third_party/pt_field_pack/pt_fieldtype.php on line 148

  • I found an entry right after I posted this which answered how to resolve the issue. I GREATLY apologize for posting this question without looking deeper first. Sighhhh.
    – L.Callif
    Jun 7, 2016 at 22:43

1 Answer 1


The answer is to perform the following:

Open up pt_fieldtype.php and below the constructor (around line 29) add:

public function display_field($data) { // This placeholder function will prevent the PHP error }

  • I have same issue in this field and your solution is worked for me. Feb 10, 2021 at 13:30

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