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72 lines
2.1 KiB
72 lines
2.1 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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namespace Tiki\TikiDb;
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class SanitizeEncoding
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{
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/**
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* string Replacement char when checking for invalid chars
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*/
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const INVALID_CHAR_REPLACEMENT = ' '; // invalid chars will be replaced with space
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/**
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* Filter chars from the input (string or array) based on the expected charset in the database
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*
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* @param string|array $values
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* @param array $utf8FieldList
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* @param string $field
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* @return string|array
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*/
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public static function filterMysqlUtf8($values, $utf8FieldList = [], $field = null)
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{
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// shortcut to avoid extra processing, if not needed
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if (empty($utf8FieldList)) {
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return $values;
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}
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if (is_array($values)) {
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foreach ($values as $key => $value) {
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if (isset($utf8FieldList[$key])) {
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$values[$key] = self::filterAllowedCharsInMysqlCharsetUtf8($value);
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}
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}
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return $values;
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} else {
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if (isset($utf8FieldList[$field])) {
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$values = self::filterAllowedCharsInMysqlCharsetUtf8($values);
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}
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}
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return $values;
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}
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/**
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* Filter chars based on the encoding expected by the db
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*
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* @param string $value
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* @return string
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*/
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protected static function filterAllowedCharsInMysqlCharsetUtf8($value)
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{
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// TODO: Something more fancy like replace emoji with asccii smiles when possible
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// Regular expression from https://www.w3.org/International/questions/qa-forms-utf-8.en
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$value = preg_replace(
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'%(?:
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\xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
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| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
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| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
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)%xs',
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self::INVALID_CHAR_REPLACEMENT,
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$value
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);
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return $value;
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}
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}
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