https://www.machform.com/forums/ MachForm Community Forums Topic: Validating U.S. Zip Code for Zip +4 en Sun, 03 May 2026 20:58:56 +0000 https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24668 Sat, 09 Jan 2016 01:46:32 +0000 NickJ 24668@https://www.machform.com/forums/ <p>For anyone else interested, the code above works if you build the address fields individually on the form and not use the built in address field. That allows the variable $zip_code_element_id to be compared to a digit without the underscore. Thanks for the assist, yuniar. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24649 Mon, 04 Jan 2016 22:49:42 +0000 NickJ 24649@https://www.machform.com/forums/ <p>ping </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24615 Sun, 27 Dec 2015 00:31:46 +0000 fla56 24615@https://www.machform.com/forums/ <p>Hi Yuniar, hi guys, thanks for the code, I've been able to modify it to help me build domain-specific email validation but I need a little more help with this:</p> <p>if($form_id == 66389){ $email_element_id = 9; if (!preg_match("/"."^([a-z0-9]+(?!.*(?:\+{2,}|\-{2,}|\.{2,}))(?:[\.+\-]{0,1}[a-z0-9])*@nhs.net|[a-z0-9]+(?!.*(?:\+{2,}|\-{2,}|\.{2,}))(?:[\.+\-]{0,1}[a-z0-9])*@.*\.nhs\.uk)$"."/",$user_input['element_'.$email_element_id])){ $error_elements[$email_element_id] = 'Non-NHS email. Please enter a valid address.'; } }</p> <p>I really need to be able to do this for any/all forms and any/all email fields, ideally on a per-field basis (and for machform logins), any ideas?</p> <p>Thanks in advance.</p> <p>David </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24609 Thu, 24 Dec 2015 03:21:17 +0000 NickJ 24609@https://www.machform.com/forums/ <p>Thanks. Having some issues with implementing this. The source code is showing the Zip Code to be element_6_5. I've tried the following iterations with no luck:</p> <p>$zip_code_element_id = 6;<br /> $zip_code_element_id = "6_5";<br /> $zip_code_element_id = 6_5;<br /> $zip_code_element_id = 5;</p> <p>Thanks. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24599 Mon, 21 Dec 2015 11:26:25 +0000 yuniar 24599@https://www.machform.com/forums/ <p>Let say you have a form with id number 12629 and the text field you're using for the zip code is having id number 1 (check the html source of your form to see it).</p> <p>You can edit your "machform/includes/post-functions.php" file. Search around line 452 for this code:</p> <pre><code>$error_elements = array(); $table_data = array();</code></pre> <p>below that block of code, add this code:</p> <pre><code>if($form_id == 12629){ $zip_code_element_id = 1; if (!preg_match(&quot;/&quot;.&quot;^\d{5}([\-]?\d{4})?$&quot;.&quot;/i&quot;,$user_input[&#39;element_&#39;.$zip_code_element_id])){ $error_elements[$zip_code_element_id] = &#39;Incorrect zip code&#39;; } }</code></pre> <p>That should do it.<br /> Just make sure to adjust the above form id number and the zip code field number with your own. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24545 Fri, 11 Dec 2015 00:25:41 +0000 celsiusmarketing 24545@https://www.machform.com/forums/ <p>You could validate zip code with jquery / javascript through regular expression. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24541 Thu, 10 Dec 2015 23:12:03 +0000 Saghalie 24541@https://www.machform.com/forums/ <p>Perhaps send an email to support? Especially since this hasn't been answered in a while. If and when you do get a response, please post it here!</p> <p>Regards,</p> <p>Saghalie<br /> <a href="http://www.kcmhosting.com" rel="nofollow">http://www.kcmhosting.com</a> </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24538 Thu, 10 Dec 2015 21:31:13 +0000 NickJ 24538@https://www.machform.com/forums/ <p>Ping.<br /> Any help would be greatly appreciated. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24366 Tue, 17 Nov 2015 02:03:13 +0000 christiansweatt 24366@https://www.machform.com/forums/ <p>I'd also be very interested in this, if you find the answer!<br /> Perhaps something that could be easily implemented as an optional feature (checkbox item) for the address field in future versions? </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24343 Thu, 12 Nov 2015 23:48:25 +0000 NickJ 24343@https://www.machform.com/forums/ <p>Forgot to add, I'm working with version 4.6. </p> https://www.machform.com/forums/topic/validating-us-zip-code-for-zip-4#post-24342 Thu, 12 Nov 2015 23:08:07 +0000 NickJ 24342@https://www.machform.com/forums/ <p>I've found some documentation on this in the Forum, but the posts are 6 years old and it appears the code has changed significantly. I'd like to validate the U.S. Zip Code to include 5 digits plus the optional +4. Could you point me in the right direction? Any help is appreciated! </p>