woocommerce/classes/validation.class.php

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<?php
/**
* Contains Validation functions
*
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* @class woocommerce_validation
* @package WooCommerce
* @category Class
* @author WooThemes
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*/
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class woocommerce_validation {
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/**
* Validates an email using wordpress native is_email function
*
* @param string email address
* @return boolean
*/
public static function is_email( $email ) {
return is_email( $email );
}
/**
* Validates a phone number using a regular expression
*
* @param string phone number
* @return boolean
*/
public static function is_phone( $phone ) {
if (strlen(trim(preg_replace('/[\s\#0-9_\-\+\(\)]/', '', $phone)))>0) return false;
return true;
}
/**
* Checks for a valid postcode (UK)
*
* @param string postcode
* @param string country
* @return boolean
*/
public static function is_postcode( $postcode, $country ) {
if (strlen(trim(preg_replace('/[\s\-A-Za-z0-9]/', '', $postcode)))>0) return false;
if ($country=='GB') :
return self::is_GB_postcode( $postcode );
endif;
return true;
}
/* Author: John Gardner */
public static function is_GB_postcode( $toCheck ) {
// Permitted letters depend upon their position in the postcode.
$alpha1 = "[abcdefghijklmnoprstuwyz]"; // Character 1
$alpha2 = "[abcdefghklmnopqrstuvwxy]"; // Character 2
$alpha3 = "[abcdefghjkstuw]"; // Character 3
$alpha4 = "[abehmnprvwxy]"; // Character 4
$alpha5 = "[abdefghjlnpqrstuwxyz]"; // Character 5
// Expression for postcodes: AN NAA, ANN NAA, AAN NAA, and AANN NAA
$pcexp[0] = '^('.$alpha1.'{1}'.$alpha2.'{0,1}[0-9]{1,2})([0-9]{1}'.$alpha5.'{2})$';
// Expression for postcodes: ANA NAA
$pcexp[1] = '^('.$alpha1.'{1}[0-9]{1}'.$alpha3.'{1})([0-9]{1}'.$alpha5.'{2})$';
// Expression for postcodes: AANA NAA
$pcexp[2] = '^('.$alpha1.'{1}'.$alpha2.'[0-9]{1}'.$alpha4.')([0-9]{1}'.$alpha5.'{2})$';
// Exception for the special postcode GIR 0AA
$pcexp[3] = '^(gir)(0aa)$';
// Standard BFPO numbers
$pcexp[4] = '^(bfpo)([0-9]{1,4})$';
// c/o BFPO numbers
$pcexp[5] = '^(bfpo)(c\/o[0-9]{1,3})$';
// Load up the string to check, converting into lowercase and removing spaces
$postcode = strtolower($toCheck);
$postcode = str_replace (' ', '', $postcode);
// Assume we are not going to find a valid postcode
$valid = false;
// Check the string against the six types of postcodes
foreach ($pcexp as $regexp) {
if (ereg($regexp,$postcode, $matches)) {
// Load new postcode back into the form element
$toCheck = strtoupper ($matches[1] . ' ' . $matches [2]);
// Take account of the special BFPO c/o format
$toCheck = ereg_replace ('C\/O', 'c/o ', $toCheck);
// Remember that we have found that the code is valid and break from loop
$valid = true;
break;
}
}
if ($valid){return true;} else {return false;};
}
/**
* Format the postcode according to the country and length of the postcode
*
* @param string postcode
* @param string country
* @return string formatted postcode
*/
public static function format_postcode( $postcode, $country ) {
$postcode = strtoupper(trim($postcode));
$postcode = trim(preg_replace('/[\s]/', '', $postcode));
if ($country=='GB') :
if (strlen($postcode)==7)
$postcode = substr_replace($postcode, ' ', 4, 0);
else
$postcode = substr_replace($postcode, ' ', 3, 0);
endif;
return $postcode;
}
}