<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014-2019 British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author CodeIgniter Dev Team
* @copyright 2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
namespace CodeIgniter\Validation;
/**
* Format validation Rules.
*
* @package CodeIgniter\Validation
*/
class FormatRules
{
/**
* Alpha
*
* @param string
*
* @return boolean
*/
public function alpha(string $str = null): bool
{
return ctype_alpha($str);
}
//--------------------------------------------------------------------
/**
* Alpha with spaces.
*
* @param string $value Value.
*
* @return boolean True if alpha with spaces, else false.
*/
public function alpha_space(string $value = null): bool
{
if ($value === null)
{
return true;
}
return (bool) preg_match('/^[A-Z ]+$/i', $value);
}
//--------------------------------------------------------------------
/**
* Alpha-numeric with underscores and dashes
*
* @param string
*
* @return boolean
*/
public function alpha_dash(string $str = null): bool
{
return (bool) preg_match('/^[a-z0-9_-]+$/i', $str);
}
//--------------------------------------------------------------------
/**
* Alpha-numeric
*
* @param string
*
* @return boolean
*/
public function alpha_numeric(string $str = null): bool
{
return ctype_alnum($str);
}
//--------------------------------------------------------------------
/**
* Alpha-numeric w/ spaces
*
* @param string
*
* @return boolean
*/
public function alpha_numeric_space(string $str = null): bool
{
return (bool) preg_match('/^[A-Z0-9 ]+$/i', $str);
}
//--------------------------------------------------------------------
/**
* Decimal number
*
* @param string
*
* @return boolean
*/
public function decimal(string $str = null): bool
{
return (bool) preg_match('/^[\-+]?[0-9]+(|\.[0-9]+)$/', $str);
}
//--------------------------------------------------------------------
/**
* Integer
*
* @param string
*
* @return boolean
*/
public function integer(string $str = null): bool
{
return (bool) preg_match('/^[\-+]?[0-9]+$/', $str);
}
//--------------------------------------------------------------------
/**
* Is a Natural number (0,1,2,3, etc.)
*
* @param string
* @return boolean
*/
public function is_natural(string $str = null): bool
{
return ctype_digit($str);
}
//--------------------------------------------------------------------
/**
* Is a Natural number, but not a zero (1,2,3, etc.)
*
* @param string
* @return boolean
*/
public function is_natural_no_zero(string $str = null): bool
{
return ($str !== '0' && ctype_digit($str));
}
//--------------------------------------------------------------------
/**
* Numeric
*
* @param string
*
* @return boolean
*/
public function numeric(string $str = null): bool
{
return (bool) preg_match('/^[\-+]?[0-9]*\.?[0-9]+$/', $str);
}
//--------------------------------------------------------------------
/**
* Compares value against a regular expression pattern.
*
* @param string $str
* @param string $pattern
* @param array $data Other field/value pairs
*
* @return boolean
*/
public function regex_match(string $str = null, string $pattern, array $data): bool
{
if (strpos($pattern, '/') !== 0)
{
$pattern = "/{$pattern}/";
}
return (bool) preg_match($pattern, $str);
}
//--------------------------------------------------------------------
/**
* Validates that the string is a valid timezone as per the
* timezone_identifiers_list function.
*
* @see http://php.net/manual/en/datetimezone.listidentifiers.php
*
* @param string $str
*
* @return boolean
*/
public function timezone(string $str = null): bool
{
return in_array($str, timezone_identifiers_list());
}
//--------------------------------------------------------------------
/**
* Valid Base64
*
* Tests a string for characters outside of the Base64 alphabet
* as defined by RFC 2045 http://www.faqs.org/rfcs/rfc2045
*
* @param string
* @return boolean
*/
public function valid_base64(string $str = null): bool
{
return (base64_encode(base64_decode($str)) === $str);
}
//--------------------------------------------------------------------
/**
* Valid JSON
*
* @param string
*
* @return boolean
*/
public function valid_json(string $str = null): bool
{
json_decode($str);
return json_last_error() === JSON_ERROR_NONE;
}
//--------------------------------------------------------------------
/**
* Checks for a correctly formatted email address
*
* @param string
*
* @return boolean
*/
public function valid_email(string $str = null): bool
{
if (function_exists('idn_to_ascii') && defined('INTL_IDNA_VARIANT_UTS46') && preg_match('#\A([^@]+)@(.+)\z#', $str, $matches))
{
$str = $matches[1] . '@' . idn_to_ascii($matches[2], 0, INTL_IDNA_VARIANT_UTS46);
}
return (bool) filter_var($str, FILTER_VALIDATE_EMAIL);
}
//--------------------------------------------------------------------
/**
* Validate a comma-separated list of email addresses.
*
* Example:
* valid_emails[one@example.com,two@example.com]
*
* @param string
*
* @return boolean
*/
public function valid_emails(string $str = null): bool
{
foreach (explode(',', $str) as $email)
{
$email = trim($email);
if ($email === '')
{
return false;
}
if ($this->valid_email($email) === false)
{
return false;
}
}
return true;
}
//--------------------------------------------------------------------
/**
* Validate an IP address
*
* @param string $ip IP Address
* @param string $which IP protocol: 'ipv4' or 'ipv6'
* @param array $data
*
* @return boolean
*/
public function valid_ip(string $ip = null, string $which = null, array $data): bool
{
switch (strtolower($which))
{
case 'ipv4':
$which = FILTER_FLAG_IPV4;
break;
case 'ipv6':
$which = FILTER_FLAG_IPV6;
break;
default:
$which = null;
break;
}
return (bool) filter_var($ip, FILTER_VALIDATE_IP, $which);
}
//--------------------------------------------------------------------
/**
* Checks a URL to ensure it's formed correctly.
*
* @param string $str
*
* @return boolean
*/
public function valid_url(string $str = null): bool
{
if (empty($str))
{
return false;
}
elseif (preg_match('/^(?:([^:]*)\:)?\/\/(.+)$/', $str, $matches))
{
if (! in_array($matches[1], ['http', 'https'], true))
{
return false;
}
$str = $matches[2];
}
$str = 'http://' . $str;
return (filter_var($str, FILTER_VALIDATE_URL) !== false);
}
//--------------------------------------------------------------------
/**
* Checks for a valid date and matches a given date format
*
* @param string $str
* @param string $format
*
* @return boolean
*/
public function valid_date(string $str = null, string $format = null): bool
{
if (empty($format))
{
return (bool) strtotime($str);
}
$date = \DateTime::createFromFormat($format, $str);
return (bool) $date && \DateTime::getLastErrors()['warning_count'] === 0 && \DateTime::getLastErrors()['error_count'] === 0;
}
//--------------------------------------------------------------------
}
Jim Parry