woocommerce/includes/class-wc-validation.php

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<?php
/**
* Contains Validation functions
*
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* @class WC_Validation
* @version 2.1.0
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* @package WooCommerce/Classes
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* @category Class
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* @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
*
* @param string email address
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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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/**
* Validates a phone number using a regular expression
*
* @param string phone number
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* @return bool
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*/
public static function is_phone( $phone ) {
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if ( strlen( trim( preg_replace( '/[\s\#0-9_\-\+\(\)]/', '', $phone ) ) ) > 0 )
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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
* @param string country
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* @return bool
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*/
public static function is_postcode( $postcode, $country ) {
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if ( strlen( trim( preg_replace( '/[\s\-A-Za-z0-9]/', '', $postcode ) ) ) > 0 )
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return false;
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switch ( $country ) {
case "GB" :
return self::is_GB_postcode( $postcode );
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case "US" :
if ( preg_match( "/^([0-9]{5})(-[0-9]{4})?$/i", $postcode ) )
return true;
else
return false;
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case "CH" :
if ( preg_match( "/^([0-9]{4})$/i", $postcode ) )
return true;
else
return false;
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case "BR" :
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if ( preg_match( "/^([0-9]{5,5})([-])?([0-9]{3,3})$/", $postcode ) )
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return true;
else
return false;
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}
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return true;
}
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/**
* is_GB_postcode function.
*
* @author John Gardner
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* @param string $to_check A postcode
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* @return bool
*/
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public static function is_GB_postcode( $to_check ) {
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// Permitted letters depend upon their position in the postcode.
// http://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom#Validation
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$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
$pcexp[0] = '/^('.$alpha1.'{1}'.$alpha2.'{0,1}[0-9]{1,2})([0-9]{1}'.$alpha5.'{2})$/';
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// Expression for postcodes: ANA NAA
$pcexp[1] = '/^('.$alpha1.'{1}[0-9]{1}'.$alpha3.'{1})([0-9]{1}'.$alpha5.'{2})$/';
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// Expression for postcodes: AANA NAA
$pcexp[2] = '/^('.$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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/**
* 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 ) {
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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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*
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* @access public
* @param mixed $tel
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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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}