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614 lines
18 KiB
614 lines
18 KiB
2 years ago
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<?php
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/**
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* Form validation for configuration editor
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin\Config;
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use PhpMyAdmin\Core;
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use PhpMyAdmin\Util;
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use function __;
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use function array_map;
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use function array_merge;
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use function array_shift;
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use function call_user_func_array;
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use function count;
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use function error_clear_last;
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use function error_get_last;
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use function explode;
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use function filter_var;
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use function htmlspecialchars;
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use function intval;
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use function is_array;
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use function is_object;
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use function mb_strpos;
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use function mb_substr;
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use function mysqli_close;
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use function mysqli_connect;
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use function mysqli_report;
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use function preg_match;
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use function preg_replace;
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use function sprintf;
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use function str_replace;
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use function trim;
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use const FILTER_FLAG_IPV4;
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use const FILTER_FLAG_IPV6;
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use const FILTER_VALIDATE_IP;
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use const MYSQLI_REPORT_OFF;
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use const PHP_INT_MAX;
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/**
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* Validation class for various validation functions
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*
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* Validation function takes two argument: id for which it is called
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* and array of fields' values (usually values for entire formset).
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* The function must always return an array with an error (or error array)
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* assigned to a form element (formset name or field path). Even if there are
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* no errors, key must be set with an empty value.
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*
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* Validation functions are assigned in $cfg_db['_validators'] (config.values.php).
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*/
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class Validator
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{
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/**
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* Returns validator list
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*
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* @param ConfigFile $cf Config file instance
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*
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* @return array
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*/
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public static function getValidators(ConfigFile $cf)
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{
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static $validators = null;
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if ($validators !== null) {
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return $validators;
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}
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$validators = $cf->getDbEntry('_validators', []);
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if ($GLOBALS['config']->get('is_setup')) {
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return $validators;
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}
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// not in setup script: load additional validators for user
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// preferences we need original config values not overwritten
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// by user preferences, creating a new PhpMyAdmin\Config instance is a
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// better idea than hacking into its code
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$uvs = $cf->getDbEntry('_userValidators', []);
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foreach ($uvs as $field => $uvList) {
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$uvList = (array) $uvList;
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foreach ($uvList as &$uv) {
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if (! is_array($uv)) {
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continue;
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}
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for ($i = 1, $nb = count($uv); $i < $nb; $i++) {
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if (mb_substr($uv[$i], 0, 6) !== 'value:') {
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continue;
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}
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$uv[$i] = Core::arrayRead(
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mb_substr($uv[$i], 6),
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$GLOBALS['config']->baseSettings
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);
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}
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}
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$validators[$field] = isset($validators[$field])
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? array_merge((array) $validators[$field], $uvList)
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: $uvList;
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}
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return $validators;
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}
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/**
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* Runs validation $validator_id on values $values and returns error list.
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*
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* Return values:
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* o array, keys - field path or formset id, values - array of errors
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* when $isPostSource is true values is an empty array to allow for error list
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* cleanup in HTML document
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* o false - when no validators match name(s) given by $validator_id
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*
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* @param ConfigFile $cf Config file instance
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* @param string|array $validatorId ID of validator(s) to run
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* @param array $values Values to validate
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* @param bool $isPostSource tells whether $values are directly from
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* POST request
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*
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* @return bool|array
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*/
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public static function validate(
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ConfigFile $cf,
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$validatorId,
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array &$values,
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$isPostSource
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) {
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// find validators
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$validatorId = (array) $validatorId;
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$validators = static::getValidators($cf);
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$vids = [];
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foreach ($validatorId as &$vid) {
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$vid = $cf->getCanonicalPath($vid);
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if (! isset($validators[$vid])) {
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continue;
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}
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$vids[] = $vid;
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}
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if (empty($vids)) {
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return false;
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}
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// create argument list with canonical paths and remember path mapping
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$arguments = [];
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$keyMap = [];
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foreach ($values as $k => $v) {
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$k2 = $isPostSource ? str_replace('-', '/', $k) : $k;
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$k2 = mb_strpos($k2, '/')
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? $cf->getCanonicalPath($k2)
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: $k2;
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$keyMap[$k2] = $k;
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$arguments[$k2] = $v;
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}
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// validate
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$result = [];
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foreach ($vids as $vid) {
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// call appropriate validation functions
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foreach ((array) $validators[$vid] as $validator) {
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$vdef = (array) $validator;
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$vname = array_shift($vdef);
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/** @var callable $vname */
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$vname = 'PhpMyAdmin\Config\Validator::' . $vname;
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$args = array_merge([$vid, &$arguments], $vdef);
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$r = call_user_func_array($vname, $args);
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// merge results
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if (! is_array($r)) {
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continue;
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}
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foreach ($r as $key => $errorList) {
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// skip empty values if $isPostSource is false
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if (! $isPostSource && empty($errorList)) {
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continue;
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}
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if (! isset($result[$key])) {
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$result[$key] = [];
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}
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$errorList = array_map('PhpMyAdmin\Sanitize::sanitizeMessage', (array) $errorList);
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$result[$key] = array_merge($result[$key], $errorList);
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}
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}
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}
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// restore original paths
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$newResult = [];
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foreach ($result as $k => $v) {
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$k2 = $keyMap[$k] ?? $k;
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$newResult[$k2] = $v;
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}
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return empty($newResult) ? true : $newResult;
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}
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/**
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* Test database connection
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*
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* @param string $host host name
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* @param string $port tcp port to use
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* @param string $socket socket to use
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* @param string $user username to use
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* @param string $pass password to use
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* @param string $errorKey key to use in return array
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*
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* @return bool|array
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*/
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public static function testDBConnection(
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$host,
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$port,
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$socket,
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$user,
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$pass = null,
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$errorKey = 'Server'
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) {
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if ($GLOBALS['cfg']['DBG']['demo']) {
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// Connection test disabled on the demo server!
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return true;
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}
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$error = null;
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$host = Core::sanitizeMySQLHost($host);
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error_clear_last();
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/** @var string $socket */
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$socket = empty($socket) ? null : $socket;
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/** @var int $port */
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$port = empty($port) ? null : (int) $port;
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mysqli_report(MYSQLI_REPORT_OFF);
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$conn = @mysqli_connect($host, $user, (string) $pass, '', $port, $socket);
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if (! $conn) {
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$error = __('Could not connect to the database server!');
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} else {
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mysqli_close($conn);
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}
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if ($error !== null) {
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$lastError = error_get_last();
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if ($lastError !== null) {
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$error .= ' - ' . $lastError['message'];
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}
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}
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return $error === null ? true : [$errorKey => $error];
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}
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/**
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* Validate server config
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*
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* @param string $path path to config, not used
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* keep this parameter since the method is invoked using
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* reflection along with other similar methods
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* @param array $values config values
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*
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* @return array
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*/
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public static function validateServer($path, array $values)
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{
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$result = [
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'Server' => '',
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'Servers/1/user' => '',
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'Servers/1/SignonSession' => '',
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'Servers/1/SignonURL' => '',
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];
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$error = false;
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if (empty($values['Servers/1/auth_type'])) {
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$values['Servers/1/auth_type'] = '';
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$result['Servers/1/auth_type'] = __('Invalid authentication type!');
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$error = true;
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}
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if ($values['Servers/1/auth_type'] === 'config' && empty($values['Servers/1/user'])) {
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$result['Servers/1/user'] = __('Empty username while using [kbd]config[/kbd] authentication method!');
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$error = true;
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}
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if ($values['Servers/1/auth_type'] === 'signon' && empty($values['Servers/1/SignonSession'])) {
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$result['Servers/1/SignonSession'] = __(
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'Empty signon session name while using [kbd]signon[/kbd] authentication method!'
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);
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$error = true;
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}
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if ($values['Servers/1/auth_type'] === 'signon' && empty($values['Servers/1/SignonURL'])) {
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$result['Servers/1/SignonURL'] = __(
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'Empty signon URL while using [kbd]signon[/kbd] authentication method!'
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);
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$error = true;
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}
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if (! $error && $values['Servers/1/auth_type'] === 'config') {
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$password = '';
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if (! empty($values['Servers/1/password'])) {
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$password = $values['Servers/1/password'];
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}
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$test = static::testDBConnection(
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empty($values['Servers/1/host']) ? '' : $values['Servers/1/host'],
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empty($values['Servers/1/port']) ? '' : $values['Servers/1/port'],
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empty($values['Servers/1/socket']) ? '' : $values['Servers/1/socket'],
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empty($values['Servers/1/user']) ? '' : $values['Servers/1/user'],
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$password,
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'Server'
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);
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if (is_array($test)) {
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$result = array_merge($result, $test);
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}
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}
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return $result;
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}
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/**
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* Validate pmadb config
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*
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* @param string $path path to config, not used
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* keep this parameter since the method is invoked using
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* reflection along with other similar methods
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* @param array $values config values
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*
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* @return array
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*/
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public static function validatePMAStorage($path, array $values)
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{
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$result = [
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'Server_pmadb' => '',
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'Servers/1/controluser' => '',
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'Servers/1/controlpass' => '',
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];
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$error = false;
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if (empty($values['Servers/1/pmadb'])) {
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return $result;
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}
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$result = [];
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if (empty($values['Servers/1/controluser'])) {
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$result['Servers/1/controluser'] = __(
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'Empty phpMyAdmin control user while using phpMyAdmin configuration storage!'
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);
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$error = true;
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}
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if (empty($values['Servers/1/controlpass'])) {
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$result['Servers/1/controlpass'] = __(
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'Empty phpMyAdmin control user password while using phpMyAdmin configuration storage!'
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);
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$error = true;
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}
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if (! $error) {
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$test = static::testDBConnection(
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empty($values['Servers/1/host']) ? '' : $values['Servers/1/host'],
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empty($values['Servers/1/port']) ? '' : $values['Servers/1/port'],
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empty($values['Servers/1/socket']) ? '' : $values['Servers/1/socket'],
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empty($values['Servers/1/controluser']) ? '' : $values['Servers/1/controluser'],
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empty($values['Servers/1/controlpass']) ? '' : $values['Servers/1/controlpass'],
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'Server_pmadb'
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);
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if (is_array($test)) {
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$result = array_merge($result, $test);
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}
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}
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return $result;
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}
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/**
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* Validates regular expression
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*
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* @param string $path path to config
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* @param array $values config values
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*
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* @return array
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||
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*/
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public static function validateRegex($path, array $values)
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||
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{
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$result = [$path => ''];
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if (empty($values[$path])) {
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||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
error_clear_last();
|
||
|
|
|
||
|
|
$matches = [];
|
||
|
|
// in libraries/ListDatabase.php _checkHideDatabase(),
|
||
|
|
// a '/' is used as the delimiter for hide_db
|
||
|
|
@preg_match('/' . Util::requestString($values[$path]) . '/', '', $matches);
|
||
|
|
|
||
|
|
$currentError = error_get_last();
|
||
|
|
|
||
|
|
if ($currentError !== null) {
|
||
|
|
$error = preg_replace('/^preg_match\(\): /', '', $currentError['message']);
|
||
|
|
|
||
|
|
return [$path => $error];
|
||
|
|
}
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates TrustedProxies field
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public static function validateTrustedProxies($path, array $values)
|
||
|
|
{
|
||
|
|
$result = [$path => []];
|
||
|
|
|
||
|
|
if (empty($values[$path])) {
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (is_array($values[$path]) || is_object($values[$path])) {
|
||
|
|
// value already processed by FormDisplay::save
|
||
|
|
$lines = [];
|
||
|
|
foreach ($values[$path] as $ip => $v) {
|
||
|
|
$v = Util::requestString($v);
|
||
|
|
$lines[] = preg_match('/^-\d+$/', $ip)
|
||
|
|
? $v
|
||
|
|
: $ip . ': ' . $v;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// AJAX validation
|
||
|
|
$lines = explode("\n", $values[$path]);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($lines as $line) {
|
||
|
|
$line = trim($line);
|
||
|
|
$matches = [];
|
||
|
|
// we catch anything that may (or may not) be an IP
|
||
|
|
if (! preg_match('/^(.+):(?:[ ]?)\\w+$/', $line, $matches)) {
|
||
|
|
$result[$path][] = __('Incorrect value:') . ' '
|
||
|
|
. htmlspecialchars($line);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// now let's check whether we really have an IP address
|
||
|
|
if (
|
||
|
|
filter_var($matches[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false
|
||
|
|
&& filter_var($matches[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false
|
||
|
|
) {
|
||
|
|
$ip = htmlspecialchars(trim($matches[1]));
|
||
|
|
$result[$path][] = sprintf(__('Incorrect IP address: %s'), $ip);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Tests integer value
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
* @param bool $allowNegative allow negative values
|
||
|
|
* @param bool $allowZero allow zero
|
||
|
|
* @param int $maxValue max allowed value
|
||
|
|
* @param string $errorString error message string
|
||
|
|
*
|
||
|
|
* @return string empty string if test is successful
|
||
|
|
*/
|
||
|
|
public static function validateNumber(
|
||
|
|
$path,
|
||
|
|
array $values,
|
||
|
|
$allowNegative,
|
||
|
|
$allowZero,
|
||
|
|
$maxValue,
|
||
|
|
$errorString
|
||
|
|
) {
|
||
|
|
if (empty($values[$path])) {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
$value = Util::requestString($values[$path]);
|
||
|
|
|
||
|
|
if (
|
||
|
|
intval($value) != $value
|
||
|
|
|| (! $allowNegative && $value < 0)
|
||
|
|
|| (! $allowZero && $value == 0)
|
||
|
|
|| $value > $maxValue
|
||
|
|
) {
|
||
|
|
return $errorString;
|
||
|
|
}
|
||
|
|
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates port number
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public static function validatePortNumber($path, array $values)
|
||
|
|
{
|
||
|
|
return [
|
||
|
|
$path => static::validateNumber(
|
||
|
|
$path,
|
||
|
|
$values,
|
||
|
|
false,
|
||
|
|
false,
|
||
|
|
65535,
|
||
|
|
__('Not a valid port number!')
|
||
|
|
),
|
||
|
|
];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates positive number
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public static function validatePositiveNumber($path, array $values)
|
||
|
|
{
|
||
|
|
return [
|
||
|
|
$path => static::validateNumber(
|
||
|
|
$path,
|
||
|
|
$values,
|
||
|
|
false,
|
||
|
|
false,
|
||
|
|
PHP_INT_MAX,
|
||
|
|
__('Not a positive number!')
|
||
|
|
),
|
||
|
|
];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates non-negative number
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public static function validateNonNegativeNumber($path, array $values)
|
||
|
|
{
|
||
|
|
return [
|
||
|
|
$path => static::validateNumber(
|
||
|
|
$path,
|
||
|
|
$values,
|
||
|
|
false,
|
||
|
|
true,
|
||
|
|
PHP_INT_MAX,
|
||
|
|
__('Not a non-negative number!')
|
||
|
|
),
|
||
|
|
];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates value according to given regular expression
|
||
|
|
* Pattern and modifiers must be a valid for PCRE <b>and</b> JavaScript RegExp
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
* @param string $regex regular expression to match
|
||
|
|
*
|
||
|
|
* @return array|string
|
||
|
|
*/
|
||
|
|
public static function validateByRegex($path, array $values, $regex)
|
||
|
|
{
|
||
|
|
if (! isset($values[$path])) {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
$result = preg_match($regex, Util::requestString($values[$path]));
|
||
|
|
|
||
|
|
return [$path => $result ? '' : __('Incorrect value!')];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates upper bound for numeric inputs
|
||
|
|
*
|
||
|
|
* @param string $path path to config
|
||
|
|
* @param array $values config values
|
||
|
|
* @param int $maxValue maximal allowed value
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public static function validateUpperBound($path, array $values, $maxValue)
|
||
|
|
{
|
||
|
|
$result = $values[$path] <= $maxValue;
|
||
|
|
|
||
|
|
return [
|
||
|
|
$path => $result ? '' : sprintf(
|
||
|
|
__('Value must be less than or equal to %s!'),
|
||
|
|
$maxValue
|
||
|
|
),
|
||
|
|
];
|
||
|
|
}
|
||
|
|
}
|