366 lines
9.5 KiB
PHP
366 lines
9.5 KiB
PHP
<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Validation helper class.
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*
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* $Id: valid.php 4679 2009-11-10 01:45:52Z isaiah $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2009 Kohana Team
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* @license http://kohanaphp.com/license
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*/
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class valid_Core {
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/**
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* Validate email, commonly used characters only
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*
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* @param string email address
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* @return boolean
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*/
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public static function email($email)
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{
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return (bool) preg_match('/^[-_a-z0-9\'+*$^&%=~!?{}]++(?:\.[-_a-z0-9\'+*$^&%=~!?{}]+)*+@(?:(?![-.])[-a-z0-9.]+(?<![-.])\.[a-z]{2,6}|\d{1,3}(?:\.\d{1,3}){3})(?::\d++)?$/iD', (string) $email);
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}
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/**
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* Validate the domain of an email address by checking if the domain has a
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* valid MX record.
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*
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* @param string email address
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* @return boolean
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*/
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public static function email_domain($email)
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{
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// If we can't prove the domain is invalid, consider it valid
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// Note: checkdnsrr() is not implemented on Windows platforms
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if ( ! function_exists('checkdnsrr'))
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return TRUE;
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// Check if the email domain has a valid MX record
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return (bool) checkdnsrr(preg_replace('/^[^@]+@/', '', $email), 'MX');
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}
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/**
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* Validate email, RFC compliant version
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* Note: This function is LESS strict than valid_email. Choose carefully.
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*
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* @see Originally by Cal Henderson, modified to fit Kohana syntax standards:
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* @see http://www.iamcal.com/publish/articles/php/parsing_email/
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* @see http://www.w3.org/Protocols/rfc822/
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*
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* @param string email address
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* @return boolean
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*/
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public static function email_rfc($email)
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{
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$qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
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$dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
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$atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
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$pair = '\\x5c[\\x00-\\x7f]';
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$domain_literal = "\\x5b($dtext|$pair)*\\x5d";
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$quoted_string = "\\x22($qtext|$pair)*\\x22";
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$sub_domain = "($atom|$domain_literal)";
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$word = "($atom|$quoted_string)";
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$domain = "$sub_domain(\\x2e$sub_domain)*";
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$local_part = "$word(\\x2e$word)*";
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$addr_spec = "$local_part\\x40$domain";
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return (bool) preg_match('/^'.$addr_spec.'$/D', (string) $email);
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}
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/**
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* Validate URL
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*
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* @param string URL
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* @return boolean
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*/
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public static function url($url)
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{
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return (bool) filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_HOST_REQUIRED);
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}
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/**
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* Validate IP
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*
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* @param string IP address
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* @param boolean allow IPv6 addresses
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* @param boolean allow private IP networks
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* @return boolean
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*/
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public static function ip($ip, $ipv6 = FALSE, $allow_private = TRUE)
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{
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// By default do not allow private and reserved range IPs
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$flags = FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE;
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if ($allow_private === TRUE)
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$flags = FILTER_FLAG_NO_RES_RANGE;
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if ($ipv6 === TRUE)
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return (bool) filter_var($ip, FILTER_VALIDATE_IP, $flags);
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return (bool) filter_var($ip, FILTER_VALIDATE_IP, $flags | FILTER_FLAG_IPV4);
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}
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/**
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* Validates a credit card number using the Luhn (mod10) formula.
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* @see http://en.wikipedia.org/wiki/Luhn_algorithm
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*
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* @param integer credit card number
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* @param string|array card type, or an array of card types
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* @return boolean
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*/
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public static function credit_card($number, $type = NULL)
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{
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// Remove all non-digit characters from the number
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if (($number = preg_replace('/\D+/', '', $number)) === '')
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return FALSE;
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if ($type == NULL)
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{
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// Use the default type
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$type = 'default';
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}
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elseif (is_array($type))
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{
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foreach ($type as $t)
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{
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// Test each type for validity
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if (valid::credit_card($number, $t))
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return TRUE;
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}
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return FALSE;
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}
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$cards = Kohana::config('credit_cards');
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// Check card type
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$type = strtolower($type);
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if ( ! isset($cards[$type]))
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return FALSE;
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// Check card number length
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$length = strlen($number);
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// Validate the card length by the card type
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if ( ! in_array($length, preg_split('/\D+/', $cards[$type]['length'])))
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return FALSE;
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// Check card number prefix
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if ( ! preg_match('/^'.$cards[$type]['prefix'].'/', $number))
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return FALSE;
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// No Luhn check required
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if ($cards[$type]['luhn'] == FALSE)
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return TRUE;
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// Checksum of the card number
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$checksum = 0;
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for ($i = $length - 1; $i >= 0; $i -= 2)
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{
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// Add up every 2nd digit, starting from the right
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$checksum += substr($number, $i, 1);
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}
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for ($i = $length - 2; $i >= 0; $i -= 2)
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{
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// Add up every 2nd digit doubled, starting from the right
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$double = substr($number, $i, 1) * 2;
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// Subtract 9 from the double where value is greater than 10
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$checksum += ($double >= 10) ? $double - 9 : $double;
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}
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// If the checksum is a multiple of 10, the number is valid
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return ($checksum % 10 === 0);
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}
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/**
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* Checks if a phone number is valid.
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*
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* @param string phone number to check
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* @return boolean
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*/
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public static function phone($number, $lengths = NULL)
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{
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if ( ! is_array($lengths))
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{
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$lengths = array(7,10,11);
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}
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// Remove all non-digit characters from the number
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$number = preg_replace('/\D+/', '', $number);
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// Check if the number is within range
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return in_array(strlen($number), $lengths);
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}
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/**
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* Tests if a string is a valid date string.
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*
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* @param string date to check
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* @return boolean
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*/
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public static function date($str)
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{
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return (strtotime($str) !== FALSE);
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}
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/**
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* Checks whether a string consists of alphabetical characters only.
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*
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* @param string input string
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* @param boolean trigger UTF-8 compatibility
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* @return boolean
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*/
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public static function alpha($str, $utf8 = FALSE)
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{
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return ($utf8 === TRUE)
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? (bool) preg_match('/^\pL++$/uD', (string) $str)
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: ctype_alpha((string) $str);
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}
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/**
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* Checks whether a string consists of alphabetical characters and numbers only.
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*
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* @param string input string
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* @param boolean trigger UTF-8 compatibility
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* @return boolean
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*/
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public static function alpha_numeric($str, $utf8 = FALSE)
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{
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return ($utf8 === TRUE)
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? (bool) preg_match('/^[\pL\pN]++$/uD', (string) $str)
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: ctype_alnum((string) $str);
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}
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/**
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* Checks whether a string consists of alphabetical characters, numbers, underscores and dashes only.
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*
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* @param string input string
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* @param boolean trigger UTF-8 compatibility
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* @return boolean
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*/
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public static function alpha_dash($str, $utf8 = FALSE)
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{
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return ($utf8 === TRUE)
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? (bool) preg_match('/^[-\pL\pN_]++$/uD', (string) $str)
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: (bool) preg_match('/^[-a-z0-9_]++$/iD', (string) $str);
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}
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/**
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* Checks whether a string consists of digits only (no dots or dashes).
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*
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* @param string input string
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* @param boolean trigger UTF-8 compatibility
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* @return boolean
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*/
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public static function digit($str, $utf8 = FALSE)
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{
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return ($utf8 === TRUE)
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? (bool) preg_match('/^\pN++$/uD', (string) $str)
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: ctype_digit((string) $str);
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}
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/**
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* Checks whether a string is a valid number (negative and decimal numbers allowed).
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*
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* @see Uses locale conversion to allow decimal point to be locale specific.
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* @see http://www.php.net/manual/en/function.localeconv.php
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*
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* @param string input string
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* @return boolean
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*/
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public static function numeric($str)
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{
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// Use localeconv to set the decimal_point value: Usually a comma or period.
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$locale = localeconv();
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return (bool) preg_match('/^-?[0-9'.$locale['decimal_point'].']++$/D', (string) $str);
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}
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/**
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* Tests if an integer is within a range.
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*
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* @param integer number to check
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* @param array valid range of input
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* @return boolean
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*/
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public static function range($number, array $range)
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{
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// Invalid by default
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$status = FALSE;
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if (is_int($number) OR ctype_digit($number))
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{
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if (count($range) > 1)
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{
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if ($number >= $range[0] AND $number <= $range[1])
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{
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// Number is within the required range
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$status = TRUE;
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}
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}
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elseif ($number >= $range[0])
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{
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// Number is greater than the minimum
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$status = TRUE;
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}
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}
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return $status;
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}
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/**
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* Checks if a string is a proper decimal format. The format array can be
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* used to specify a decimal length, or a number and decimal length, eg:
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* array(2) would force the number to have 2 decimal places, array(4,2)
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* would force the number to have 4 digits and 2 decimal places.
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*
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* @param string input string
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* @param array decimal format: y or x,y
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* @return boolean
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*/
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public static function decimal($str, $format = NULL)
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{
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// Create the pattern
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$pattern = '/^[0-9]%s\.[0-9]%s$/';
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if ( ! empty($format))
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{
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if (count($format) > 1)
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{
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// Use the format for number and decimal length
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$pattern = sprintf($pattern, '{'.$format[0].'}', '{'.$format[1].'}');
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}
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elseif (count($format) > 0)
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{
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// Use the format as decimal length
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$pattern = sprintf($pattern, '+', '{'.$format[0].'}');
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}
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}
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else
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{
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// No format
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$pattern = sprintf($pattern, '+', '+');
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}
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return (bool) preg_match($pattern, (string) $str);
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}
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/**
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* Checks if a string is a proper hexadecimal HTML color value. The validation
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* is quite flexible as it does not require an initial "#" and also allows for
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* the short notation using only three instead of six hexadecimal characters.
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* You may want to normalize these values with format::color().
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*
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* @param string input string
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* @return boolean
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*/
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public static function color($str)
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{
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return (bool) preg_match('/^#?+[0-9a-f]{3}(?:[0-9a-f]{3})?$/iD', $str);
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}
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} // End valid
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