https://legacy.forums.gravityhelp.com/topic/zip-code-validation Gravity Support Forums Topic: ZIP code validation en-US Tue, 07 Apr 2026 16:40:08 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/zip-code-validation#post-31840 Fri, 05 Aug 2011 14:05:08 +0000 Kevin Flahaut 31840@https://legacy.forums.gravityhelp.com/ <p>That was easy :) Glad you figured it out. </p> https://legacy.forums.gravityhelp.com/topic/zip-code-validation#post-31838 Fri, 05 Aug 2011 12:54:53 +0000 JossNL 31838@https://legacy.forums.gravityhelp.com/ <p>And of course you see what you're doing wrong only when you just hit submit.</p> <p>ZIP code is not in input_x.3 but in input_x_3<br /> I was looking at the name, not the ID.</p> <p>It's working now! </p> https://legacy.forums.gravityhelp.com/topic/zip-code-validation#post-31837 Fri, 05 Aug 2011 12:51:47 +0000 JossNL 31837@https://legacy.forums.gravityhelp.com/ <p>Hi there,</p> <p>I've been having some troubles with GravityForms... Or users, to be more precise. They seem to be mistaking the ZIP code field for street number. So I decided I need a validation on the ZIP code. Problem is... I use the advanced address field you guys supplied, and I can't get the validation to work on that. Our zip code (postcode) is made up out of 4 numbers, an optional space and 2 letters. The problem is probably in the field id. I tried it with<br /> <code>$field_value = rgpost(&quot;input_{$field[&#39;id&#39;]}&quot;);</code><br /> and<br /> <code>$field_value = rgpost(&quot;input_{$field[&#39;id&#39;]}.3&quot;);</code><br /> since the zipcode is in input_x.3</p> <p>Both fail. If I use it on a normal text line, the validation does work, but this is not an option.</p> <p>Full code:<br /> <pre><code>add_filter(&#39;gform_validation&#39;, &#39;validate_postcode&#39;); function validate_postcode($validation_result) { $form = $validation_result[&quot;form&quot;]; $current_page = rgpost(&#39;gform_source_page_number_&#39; . $form[&#39;id&#39;]) ? rgpost(&#39;gform_source_page_number_&#39; . $form[&#39;id&#39;]) : 1; foreach($form[&#39;fields&#39;] as &amp;$field){ if(strpos($field[&#39;cssClass&#39;], &#39;postcode&#39;) === false) continue; $field_page = $field[&#39;pageNumber&#39;]; $is_hidden = RGFormsModel::is_field_hidden($form, $field, array()); if($field_page != $current_page || $is_hidden) continue; $field_value = rgpost(&quot;input_{$field[&#39;id&#39;]}.3&quot;); $is_valid = is_postcode($field_value); if($is_valid) continue; $validation_result[&#39;is_valid&#39;] = false; $field[&#39;failed_validation&#39;] = true; $field[&#39;validation_message&#39;] = &#39;De postcode is niet correct ingevuld.&#39;; } $validation_result[&#39;form&#39;] = $form; return $validation_result; } function is_postcode($value) { if (preg_match(&#39;/^[1-9][0-9]{3} ?[a-zA-Z]{2}$/&#39;, $value)) { return true; } else { return false; } }</code></pre>