filter on the postcode (ZIP code)

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.

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;
}

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

Use in_array.

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;
}

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?

I’ve add your code Alnatroz.
But he will not check my submitted postcode.

Do you have any suggestion?