woocommerce/includes/class-wc-validation.php

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<?php
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if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
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/**
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* Contains Validation functions
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*
* @class WC_Validation
* @version 2.4.0
* @package WooCommerce/Classes
* @category Class
* @author WooThemes
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*/
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class WC_Validation {
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/**
* Validates an email using WordPress native is_email function.
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*
* @param string $email Email address to validate.
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* @return bool
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*/
public static function is_email( $email ) {
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return is_email( $email );
}
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/**
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* Validates a phone number using a regular expression.
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*
* @param string $phone Phone number to validate.
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* @return bool
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*/
public static function is_phone( $phone ) {
if ( 0 < strlen( trim( preg_replace( '/[\s\#0-9_\-\+\/\(\)]/', '', $phone ) ) ) ) {
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return false;
}
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return true;
}
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/**
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* Checks for a valid postcode.
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*
* @param string $postcode Postcode to validate.
* @param string $country Country to validate the postcode for.
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* @return bool
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*/
public static function is_postcode( $postcode, $country ) {
if ( strlen( trim( preg_replace( '/[\s\-A-Za-z0-9]/', '', $postcode ) ) ) > 0 ) {
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return false;
}
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switch ( $country ) {
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case 'AT' :
$valid = (bool) preg_match( '/^([0-9]{4})$/', $postcode );
break;
case 'BR' :
$valid = (bool) preg_match( '/^([0-9]{5})([-])?([0-9]{3})$/', $postcode );
break;
case 'CH' :
$valid = (bool) preg_match( '/^([0-9]{4})$/i', $postcode );
break;
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case 'DE' :
$valid = (bool) preg_match( '/^([0]{1}[1-9]{1}|[1-9]{1}[0-9]{1})[0-9]{3}$/', $postcode );
break;
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case 'ES' :
$valid = (bool) preg_match( '/^([0-9]{5})$/i', $postcode );
break;
case 'GB' :
$valid = self::is_GB_postcode( $postcode );
break;
case 'JP' :
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$valid = (bool) preg_match( '/^([0-9]{3})([-])([0-9]{4})$/', $postcode );
break;
case 'PT' :
$valid = (bool) preg_match( '/^([0-9]{4})([-])([0-9]{3})$/', $postcode );
break;
case 'US' :
$valid = (bool) preg_match( '/^([0-9]{5})(-[0-9]{4})?$/i', $postcode );
break;
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case 'CA' :
// CA Postal codes cannot contain D,F,I,O,Q,U and cannot start with W or Z. https://en.wikipedia.org/wiki/Postal_codes_in_Canada#Number_of_possible_postal_codes
$valid = (bool) preg_match( '/^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])([\ ])?(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$/i', $postcode );
break;
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case 'PL':
$valid = (bool) preg_match( '/^([0-9]{2})([-])([0-9]{3})$/', $postcode );
break;
default :
$valid = true;
break;
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}
return apply_filters( 'woocommerce_validate_postcode', $valid, $postcode, $country );
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}
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/**
* Check if is a GB postcode.
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*
* @author John Gardner
* @param string $to_check A postcode
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* @return bool
*/
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public static function is_GB_postcode( $to_check ) {
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// Permitted letters depend upon their position in the postcode.
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// https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom#Validation
$alpha1 = "[abcdefghijklmnoprstuwyz]"; // Character 1
$alpha2 = "[abcdefghklmnopqrstuvwxy]"; // Character 2
$alpha3 = "[abcdefghjkpstuw]"; // Character 3 == ABCDEFGHJKPSTUW
$alpha4 = "[abehmnprvwxy]"; // Character 4 == ABEHMNPRVWXY
$alpha5 = "[abdefghjlnpqrstuwxyz]"; // Character 5 != CIKMOV
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$pcexp = array();
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// Expression for postcodes: AN NAA, ANN NAA, AAN NAA, and AANN NAA
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$pcexp[0] = '/^(' . $alpha1 . '{1}' . $alpha2 . '{0,1}[0-9]{1,2})([0-9]{1}' . $alpha5 . '{2})$/';
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// Expression for postcodes: ANA NAA
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$pcexp[1] = '/^(' . $alpha1 . '{1}[0-9]{1}' . $alpha3 . '{1})([0-9]{1}' . $alpha5 . '{2})$/';
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// Expression for postcodes: AANA NAA
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$pcexp[2] = '/^(' . $alpha1 . '{1}' . $alpha2 . '[0-9]{1}' . $alpha4 . ')([0-9]{1}' . $alpha5 . '{2})$/';
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// Exception for the special postcode GIR 0AA
$pcexp[3] = '/^(gir)(0aa)$/';
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// Standard BFPO numbers
$pcexp[4] = '/^(bfpo)([0-9]{1,4})$/';
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// c/o BFPO numbers
$pcexp[5] = '/^(bfpo)(c\/o[0-9]{1,3})$/';
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// Load up the string to check, converting into lowercase and removing spaces
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$postcode = strtolower( $to_check );
$postcode = str_replace( ' ', '', $postcode );
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// Assume we are not going to find a valid postcode
$valid = false;
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// Check the string against the six types of postcodes
foreach ( $pcexp as $regexp ) {
if ( preg_match( $regexp, $postcode, $matches ) ) {
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// Remember that we have found that the code is valid and break from loop
$valid = true;
break;
}
}
return $valid;
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}
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/**
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* Format the postcode according to the country and length of the postcode.
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*
* @param string $postcode Postcode to format.
* @param string $country Country to format the postcode for.
* @return string Formatted postcode.
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*/
public static function format_postcode( $postcode, $country ) {
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return wc_format_postcode( $postcode, $country );
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}
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/**
* format_phone function.
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*
* @param mixed $tel Phone number to format.
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* @return string
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*/
public static function format_phone( $tel ) {
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return wc_format_phone_number( $tel );
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}
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}