Title: filter on the postcode (ZIP code) Last modified: August 22, 2016 --- # filter on the postcode (ZIP code) * Resolved [Alnatroz75018](https://wordpress.org/support/users/alnatroz75018/) * (@alnatroz75018) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/) * Dear team, I have tried hard to put a filter on a postcode in the CF7. * The idea is to display a message when the postcode is not in the area we operate in. * I used the following code in the text.php file (as you can guess I am pretty new in PHP and only customed what I could find on the web) * This doesn’t work and drives me crazy. Any help would be appreciated. * The postcode is a text on the form and has the id:postcode this line in the form:

[text*postcode /4 id:postcode placeholder “postcode”]

* The following code is in the text.php in C:\wamp\www\wordpress\wp-content\plugins\ contact-form-7\modules * ``` add_filter('wpcf7_validate_text','postcode_custom_filter', 10, 2); // Email field add_filter('wpcf7_validate_text*', 'postcode_custom_filter', 10, 2); // Req. Email field // Add custom validation for CF7 form fields on postcode function postcode_in_area($postcode){ // check if the postcode is in our area if( preg_match('2010', $postcode) || preg_match('2011', $postcode) || preg_match('2013', $postcode) || preg_match('2014', $postcode) || preg_match('2015', $postcode) || preg_match('2016', $postcode) || preg_match('2017', $postcode) || preg_match('2018', $postcode) || preg_match('2019', $postcode) ){ return true; // It's an area we operate in }else{ return false; // It's an area we do NOT service } } function postcode_custom_filter($result,$tag){ $type = $tag['type']; $name = $tag['name']; if('postcode' == $type){ // Only apply to fields with the form field name of "Your-Postcode" $the_value = $_POST[$name]; if( postcode_in_area($the_value)){ // Isn't a company email address (it matched the list of free email providers) $result['valid'] = false; $result['reason'][$name] = "sorry we do not operate in this area"; } } return $result; } ``` * [https://wordpress.org/plugins/contact-form-7/](https://wordpress.org/plugins/contact-form-7/) Viewing 7 replies - 1 through 7 (of 7 total) * Plugin Author [Takayuki Miyoshi](https://wordpress.org/support/users/takayukister/) * (@takayukister) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647272) * It’s close, but this * ``` if('postcode' == $type){ ``` * always results _false_ because the `$type` is “text*” in the case. * The `$name` is “postcode” (a name is the second word in a form-tag, a type is the first one) so change the line to: * ``` if('postcode' == $name){ ``` * Also, you shouldn’t edit plugin files. You can customize in another place like your theme’s functions.php. * Thread Starter [Alnatroz75018](https://wordpress.org/support/users/alnatroz75018/) * (@alnatroz75018) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647287) * Dear Takayuki, thank you for looking into my issue. * I have done the modification (this time in the plugin editor in WP) * Unfortunatly it does not seem to work. whatever I populate in the postcode field, the circular arrows keep turning and nothing happens * the modified code is the following * ``` add_filter('wpcf7_validate_text','postcode_custom_filter', 10, 2); // postcode field add_filter('wpcf7_validate_text*', 'postcode_custom_filter', 10, 2); // Req. postcode field // Add custom validation for CF7 form fields on postcode function postcode_in_area($postcode){ // check if the postcode is in our area if( preg_match('2010', $postcode) || preg_match('2011', $postcode) || preg_match('2013', $postcode) || preg_match('2014', $postcode) || preg_match('2015', $postcode) || preg_match('2016', $postcode) || preg_match('2017', $postcode) || preg_match('2018', $postcode) || preg_match('2019', $postcode) ){ return true; // It's an area we operate in }else{ return false; // It's an area we do NOT service } } function postcode_custom_filter($result,$tag){ $type = $tag['type']; $name = $tag['name']; if('postcode' == $name){ // Only apply to fields with the form field name of "postcode" $the_value = $_POST[$name]; if( postcode_in_area($the_value)){ // Is not in our area $result['valid'] = false; $result['reason'][$name] = "sorry we do not operate in this area"; } } return $result; } ``` * Thread Starter [Alnatroz75018](https://wordpress.org/support/users/alnatroz75018/) * (@alnatroz75018) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647292) * Hi again, * I believe the error comes from “preg_match”, as it is probably not the best way to check the exact value of the postcode. Is there a way to have a list of postcodes and match the result entered in the form against these values? * Thank you in advance * Plugin Author [Takayuki Miyoshi](https://wordpress.org/support/users/takayukister/) * (@takayukister) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647297) * Use [in_array](http://php.net/manual/en/function.in-array.php). * Thread Starter [Alnatroz75018](https://wordpress.org/support/users/alnatroz75018/) * (@alnatroz75018) * [11 years, 5 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647312) * thank you Takayuki, I used the following code if this can help someone and it works * ``` add_filter('wpcf7_validate_text','postcode_custom_filter', 10, 2); // postcode field add_filter('wpcf7_validate_text*', 'postcode_custom_filter', 10, 2); // Req. postcode field // Add custom validation for CF7 form fields on postcode function postcode_in_area($postcode){ // check if the postcode is in our area $areaArray = array('75001', '75002', '75003', '75004'); if (!in_array($postcode, $areaArray)) { return true; // It's an area we operate in }else{ return false; // It's an area we do NOT service } } function postcode_custom_filter($result,$tag){ $type = $tag['type']; $name = $tag['name']; if('postcode' == $name){ // Only apply to fields with the form field name of "postcode" $the_value = $_POST[$name]; if( postcode_in_area($the_value)){ // Is not in our area $result['valid'] = false; $result['reason'][$name] = "Sorry, we do not operate in this area."; } } return $result; } ``` * [chuey2u](https://wordpress.org/support/users/chuey2u/) * (@chuey2u) * [11 years, 1 month ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647637) * Alnotorz – I’m trying to incorporate the same function into my website but I’m having a hard time to get the coding to work. Can you walk me through what you did to get the coding to work? * [Sciron](https://wordpress.org/support/users/sciron/) * (@sciron) * [10 years, 6 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647647) * I’ve add your code Alnatroz. But he will not check my submitted postcode. * Do you have any suggestion? Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘filter on the postcode (ZIP code)’ is closed to new replies. * ![](https://ps.w.org/contact-form-7/assets/icon.svg?rev=2339255) * [Contact Form 7](https://wordpress.org/plugins/contact-form-7/) * [Frequently Asked Questions](https://wordpress.org/plugins/contact-form-7/#faq) * [Support Threads](https://wordpress.org/support/plugin/contact-form-7/) * [Active Topics](https://wordpress.org/support/plugin/contact-form-7/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/contact-form-7/unresolved/) * [Reviews](https://wordpress.org/support/plugin/contact-form-7/reviews/) ## Tags * [filter](https://wordpress.org/support/topic-tag/filter/) * [postcode](https://wordpress.org/support/topic-tag/postcode/) * [values](https://wordpress.org/support/topic-tag/values/) * 7 replies * 4 participants * Last reply from: [Sciron](https://wordpress.org/support/users/sciron/) * Last activity: [10 years, 6 months ago](https://wordpress.org/support/topic/filter-on-the-postcode-zip-code/#post-5647647) * Status: resolved