https://legacy.forums.gravityhelp.com/topic/field-for-offer-code Gravity Support Forums Topic: Field for offer code en-US Mon, 20 Apr 2026 18:43:06 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/field-for-offer-code#post-17944 Tue, 08 Feb 2011 13:33:01 +0000 Carl Hancock 17944@https://legacy.forums.gravityhelp.com/ <p>There is no built in "offer code" functionality. It's possible to implement, but you would have to use a standard text input field and then use the gform_validation hook to write your own custom validation to validate this field. I'm not sure what your PHP and WordPress development skill level is... but here is an example of the gform_validation hook.</p> <pre><code>&lt;?php add_filter(&#39;gform_validation&#39;, &#39;custom_validation&#39;); function custom_validation($validation_result){ // set the form validation to false $validation_result[&quot;is_valid&quot;] = false; $form = $validation_result[&quot;form&quot;]; // specify the first field to be invalid and provide custom validation message $form[&quot;fields&quot;][0][&quot;failed_validation&quot;] = true; $form[&quot;fields&quot;][0][&quot;validation_message&quot;] = &quot;This field is invalid!&quot;; // update the form in the validation result with the form object you modified $validation_result[&quot;form&quot;] = $form; return $validation_result; } ?&gt;</code></pre> <p>The gform_validation hook allows you to specific custom validation for a field. So you could use it to validate a string against a database table containing values, or virtually anything you want to do from a validation standpoint as long as you know how to write the code. </p> https://legacy.forums.gravityhelp.com/topic/field-for-offer-code#post-17910 Tue, 08 Feb 2011 09:58:56 +0000 veryc 17910@https://legacy.forums.gravityhelp.com/ <p>Hi, is there a field I can use for an offer code. The code will be an alphanumeric string. Ideally I want to verify the code is valid before submitting form.</p> <p>Thanks. </p>