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ZIP (POSTAL) Code Validation Regex & PHP code for 12 Countries

August 14, 2011 PHP, Programming

For the last couple of years, I’ve been mostly doing PHP coding. As a result, I have small library of code snippets of my own. Those are simple but useful PHP codes that might save some time on your work!

First one I’m sharing here today is the combination of regular expression and the PHP code to do ZIP code (or Postal Code) validation for following 12 countries: United States of America, United Kingdom, Germany, Canada, France, Italy, Australia, Netherlands, Spain, Denmark, Sweden & Belgium.

Code is provided in PHP but the REGEX codes are universal and those can be used with other programming languages.

License

<?php
$country_code="US";
$zip_postal="11111";

$ZIPREG=array(
	"US"=>"^\d{5}([\-]?\d{4})?$",
	"UK"=>"^(GIR|[A-Z]\d[A-Z\d]??|[A-Z]{2}\d[A-Z\d]??)[ ]??(\d[A-Z]{2})$",
	"DE"=>"\b((?:0[1-46-9]\d{3})|(?:[1-357-9]\d{4})|(?:[4][0-24-9]\d{3})|(?:[6][013-9]\d{3}))\b",
	"CA"=>"^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$",
	"FR"=>"^(F-)?((2[A|B])|[0-9]{2})[0-9]{3}$",
	"IT"=>"^(V-|I-)?[0-9]{5}$",
	"AU"=>"^(0[289][0-9]{2})|([1345689][0-9]{3})|(2[0-8][0-9]{2})|(290[0-9])|(291[0-4])|(7[0-4][0-9]{2})|(7[8-9][0-9]{2})$",
	"NL"=>"^[1-9][0-9]{3}\s?([a-zA-Z]{2})?$",
	"ES"=>"^([1-9]{2}|[0-9][1-9]|[1-9][0-9])[0-9]{3}$",
	"DK"=>"^([D-d][K-k])?( |-)?[1-9]{1}[0-9]{3}$",
	"SE"=>"^(s-|S-){0,1}[0-9]{3}\s?[0-9]{2}$",
	"BE"=>"^[1-9]{1}[0-9]{3}$"
);

if ($ZIPREG[$country_code]) {

	if (!preg_match("/".$ZIPREG[$country_code]."/i",$zip_postal)){
		//Validation failed, provided zip/postal code is not valid.
	} else {
		//Validation passed, provided zip/postal code is valid.
	}

} else {

	//Validation not available

}
?>