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<?php
/**
* This file is part of CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <admin@codeigniter.com>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace CodeIgniter\Validation;
use DateTime;
/**
* Format validation Rules.
*/
class FormatRules
{
/**
* Alpha
*/
public function alpha(?string $str = null): bool
{
return ctype_alpha($str ?? '');
}
/**
* Alpha with spaces.
*
* @param string|null $value Value.
*
* @return bool True if alpha with spaces, else false.
*/
public function alpha_space(?string $value = null): bool
{
if ($value === null) {
return true;
}
// @see https://regex101.com/r/LhqHPO/1
return (bool) preg_match('/\A[A-Z ]+\z/i', $value);
}
/**
* Alphanumeric with underscores and dashes
*
* @see https://regex101.com/r/XfVY3d/1
*/
public function alpha_dash(?string $str = null): bool
{
if ($str === null) {
return false;
}
return preg_match('/\A[a-z0-9_-]+\z/i', $str) === 1;
}
/**
* Alphanumeric, spaces, and a limited set of punctuation characters.
* Accepted punctuation characters are: ~ tilde, ! exclamation,
* # number, $ dollar, % percent, & ampersand, * asterisk, - dash,
* _ underscore, + plus, = equals, | vertical bar, : colon, . period
* ~ ! # $ % & * - _ + = | : .
*
* @param string|null $str
*
* @return bool
*
* @see https://regex101.com/r/6N8dDY/1
*/
public function alpha_numeric_punct($str)
{
if ($str === null) {
return false;
}
return preg_match('/\A[A-Z0-9 ~!#$%\&\*\-_+=|:.]+\z/i', $str) === 1;
}
/**
* Alphanumeric
*/
public function alpha_numeric(?string $str = null): bool
{
return ctype_alnum($str ?? '');
}
/**
* Alphanumeric w/ spaces
*/
public function alpha_numeric_space(?string $str = null): bool
{
// @see https://regex101.com/r/0AZDME/1
return (bool) preg_match('/\A[A-Z0-9 ]+\z/i', $str ?? '');
}
/**
* Any type of string
*
* Note: we specifically do NOT type hint $str here so that
* it doesn't convert numbers into strings.
*
* @param string|null $str
*/
public function string($str = null): bool
{
return is_string($str);
}
/**
* Decimal number
*/
public function decimal(?string $str = null): bool
{
// @see https://regex101.com/r/HULifl/2/
return (bool) preg_match('/\A[-+]?\d{0,}\.?\d+\z/', $str ?? '');
}
/**
* String of hexidecimal characters
*/
public function hex(?string $str = null): bool
{
return ctype_xdigit($str ?? '');
}
/**
* Integer
*/
public function integer(?string $str = null): bool
{
return (bool) preg_match('/\A[\-+]?\d+\z/', $str ?? '');
}
/**
* Is a Natural number (0,1,2,3, etc.)
*/
public function is_natural(?string $str = null): bool
{
return ctype_digit($str ?? '');
}
/**
* Is a Natural number, but not a zero (1,2,3, etc.)
*/
public function is_natural_no_zero(?string $str = null): bool
{
return $str !== '0' && ctype_digit($str ?? '');
}
/**
* Numeric
*/
public function numeric(?string $str = null): bool
{
// @see https://regex101.com/r/bb9wtr/2
return (bool) preg_match('/\A[\-+]?\d*\.?\d+\z/', $str ?? '');
}
/**
* Compares value against a regular expression pattern.
*/
public function regex_match(?string $str, string $pattern): bool
{
if (strpos($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
*/
public function timezone(?string $str = null): bool
{
return in_array($str ?? '', timezone_identifiers_list(), true);
}
/**
* 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 $str
*/
public function valid_base64(?string $str = null): bool
{
if ($str === null) {
return false;
}
return base64_encode(base64_decode($str, true)) === $str;
}
/**
* Valid JSON
*
* @param string $str
*/
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 $str
*/
public function valid_email(?string $str = null): bool
{
// @see https://regex101.com/r/wlJG1t/1/
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 $str
*/
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 (human readable format or binary string - inet_pton)
*
* @param string|null $which IP protocol: 'ipv4' or 'ipv6'
*/
public function valid_ip(?string $ip = null, ?string $which = null): bool
{
if (empty($ip)) {
return false;
}
switch (strtolower($which ?? '')) {
case 'ipv4':
$option = FILTER_FLAG_IPV4;
break;
case 'ipv6':
$option = FILTER_FLAG_IPV6;
break;
default:
$option = 0;
}
return filter_var($ip, FILTER_VALIDATE_IP, $option) !== false
|| (! ctype_print($ip) && filter_var(inet_ntop($ip), FILTER_VALIDATE_IP, $option) !== false);
}
/**
* Checks a string to ensure it is (loosely) a URL.
*
* Warning: this rule will pass basic strings like
* "banana"; use valid_url_strict for a stricter rule.
*/
public function valid_url(?string $str = null): bool
{
if (empty($str)) {
return false;
}
if (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 a URL to ensure it's formed correctly.
*
* @param string|null $validSchemes comma separated list of allowed schemes
*/
public function valid_url_strict(?string $str = null, ?string $validSchemes = null): bool
{
if (empty($str)) {
return false;
}
// parse_url() may return null and false
$scheme = strtolower((string) parse_url($str, PHP_URL_SCHEME));
$validSchemes = explode(
',',
strtolower($validSchemes ?? 'http,https')
);
return in_array($scheme, $validSchemes, true)
&& filter_var($str, FILTER_VALIDATE_URL) !== false;
}
/**
* Checks for a valid date and matches a given date format
*/
public function valid_date(?string $str = null, ?string $format = null): bool
{
if ($str === null) {
return false;
}
if (empty($format)) {
return strtotime($str) !== false;
}
$date = DateTime::createFromFormat($format, $str);
$errors = DateTime::getLastErrors();
return $date !== false && $errors !== false && $errors['warning_count'] === 0 && $errors['error_count'] === 0;
}
}
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