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ðŸ“„ OutputFilter.php(6.71 KB)

Editing: OutputFilter.php

<?php
/**
 * Part of the Joomla Framework Filter Package
 *
 * @copyright  Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Filter;

use Joomla\Language\Language;
use Joomla\Language\Transliterate;
use Joomla\String\StringHelper;

/**
 * OutputFilter is a class for processing an output string for "safe" display
 *
 * @since  1.0
 */
class OutputFilter
{
	/**
	 * Language instance for making a string URL safe
	 *
	 * @var    Language|null
	 * @since  2.0.0
	 */
	private static $language;

/**
	 * Makes an object safe to display in forms.
	 *
	 * Object parameters that are non-string, array, object or start with underscore will be converted
	 *
	 * @param   object   $mixed        An object to be parsed
	 * @param   integer  $quoteStyle   The optional quote style for the htmlspecialchars function
	 * @param   mixed    $excludeKeys  An optional string single field name or array of field names not to be parsed (eg, for a textarea)
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	public static function objectHtmlSafe(&$mixed, $quoteStyle = \ENT_QUOTES, $excludeKeys = '')
	{
		if (\is_object($mixed))
		{
			foreach (get_object_vars($mixed) as $k => $v)
			{
				if (\is_array($v) || \is_object($v) || $v == null || substr($k, 1, 1) == '_')
				{
					continue;
				}

if (\is_string($excludeKeys) && $k == $excludeKeys)
				{
					continue;
				}

if (\is_array($excludeKeys) && \in_array($k, $excludeKeys))
				{
					continue;
				}

$mixed->$k = htmlspecialchars($v, $quoteStyle, 'UTF-8');
			}
		}
	}

/**
	 * Makes a string safe for XHTML output by escaping ampersands in links.
	 *
	 * @param   string  $input  String to process
	 *
	 * @return  string  Processed string
	 *
	 * @since   1.0
	 */
	public static function linkXhtmlSafe($input)
	{
		$regex = 'href="([^"]*(&(amp;){0})[^"]*)*?"';

return preg_replace_callback(
			"#$regex#i",
			function ($m)
			{
				return preg_replace('#&(?!amp;)#', '&amp;', $m[0]);
			},
			$input
		);
	}

/**
	 * Generates a URL safe version of the specified string with language transliteration.
	 *
	 * This method processes a string and replaces all accented UTF-8 characters by unaccented
	 * ASCII-7 "equivalents"; whitespaces are replaced by hyphens and the string is lowercased.
	 *
	 * @param   string  $string    String to process
	 * @param   string  $language  Language to transliterate to
	 *
	 * @return  string  Processed string
	 *
	 * @since   1.0
	 */
	public static function stringUrlSafe($string, $language = '')
	{
		// Remove any '-' from the string since they will be used as concatenaters
		$str = str_replace('-', ' ', $string);

if (self::$language)
		{
			/*
			 * Transliterate on the language requested (fallback to current language if not specified)
			 *
			 * 1) If the language is empty, is an asterisk (used in the CMS for "All"), or the language matches, use the active Language instance
			 * 2) If the language does not match the active Language instance, build a new one to get the right transliterator
			 */
			if (empty($language) || $language === '*' || self::$language->getLanguage() === $language)
			{
				$str = self::$language->transliterate($str);
			}
			else
			{
				$str = (new Language(self::$language->getBasePath(), $language, self::$language->getDebug()))->transliterate($str);
			}
		}
		else
		{
			// Fallback behavior based on the Language package's en-GB LocaliseInterface implementation
			$str = StringHelper::strtolower((new Transliterate)->utf8_latin_to_ascii($string));
		}

// Trim white spaces at beginning and end of alias and make lowercase
		$str = trim(StringHelper::strtolower($str));

// Remove any duplicate whitespace, and ensure all characters are alphanumeric
		$str = preg_replace('/(\s|[^A-Za-z0-9\-])+/', '-', $str);

// Trim dashes at beginning and end of alias
		$str = trim($str, '-');

return $str;
	}

/**
	 * Generates a URL safe version of the specified string with unicode character replacement.
	 *
	 * @param   string  $string  String to process
	 *
	 * @return  string  Processed string
	 *
	 * @since   1.0
	 */
	public static function stringUrlUnicodeSlug($string)
	{
		// Replace double byte whitespaces by single byte (East Asian languages)
		$str = preg_replace('/\xE3\x80\x80/', ' ', $string);

// Remove any '-' from the string as they will be used as concatenator.
		// Would be great to let the spaces in but only Firefox is friendly with this

$str = str_replace('-', ' ', $str);

// Replace forbidden characters by whitespaces
		$str = preg_replace('#[:\#\*"@+=;!><&\.%()\]\/\'\\\\|\[]#', "\x20", $str);

// Delete all '?'
		$str = str_replace('?', '', $str);

// Trim white spaces at beginning and end of alias and make lowercase
		$str = trim(StringHelper::strtolower($str));

// Remove any duplicate whitespace and replace whitespaces by hyphens
		$str = preg_replace('#\x20+#', '-', $str);

return $str;
	}

/**
	 * Makes a string safe for XHTML output by escaping ampersands.
	 *
	 * @param   string  $text  Text to process
	 *
	 * @return  string  Processed string.
	 *
	 * @since   1.0
	 */
	public static function ampReplace($text)
	{
		return preg_replace('/(?<!&)&(?!&|#|[\w]+;)/', '&amp;', $text);
	}

/**
	 * Cleans text of all formatting and scripting code.
	 *
	 * @param   string  $text  Text to clean
	 *
	 * @return  string  Cleaned text.
	 *
	 * @since   1.0
	 */
	public static function cleanText(&$text)
	{
		$text = preg_replace("'<script[^>]*>.*?</script>'si", '', $text);
		$text = preg_replace('/<a\s+.*?href="([^"]+)"[^>]*>([^<]+)<\/a>/is', '\2 (\1)', $text);
		$text = preg_replace('//', '', $text);
		$text = preg_replace('/{.+?}/', '', $text);
		$text = preg_replace('/&nbsp;/', ' ', $text);
		$text = preg_replace('/&amp;/', ' ', $text);
		$text = preg_replace('/&quot;/', ' ', $text);
		$text = strip_tags($text);
		$text = htmlspecialchars($text, \ENT_COMPAT, 'UTF-8');

return $text;
	}

/**
	 * Set a Language instance for use
	 *
	 * @param   Language  $language  The Language instance to use.
	 *
	 * @return  void
	 *
	 * @since   2.0.0
	 */
	public static function setLanguage(Language $language): void
	{
		self::$language = $language;
	}

/**
	 * Strips `<img>` tags from a string.
	 *
	 * @param   string  $string  Sting to be cleaned.
	 *
	 * @return  string  Cleaned string
	 *
	 * @since   1.0
	 */
	public static function stripImages($string)
	{
		return preg_replace('#(<[/]?img.*>)#U', '', $string);
	}

/**
	 * Strips `<iframe>` tags from a string.
	 *
	 * @param   string  $string  Sting to be cleaned.
	 *
	 * @return  string  Cleaned string
	 *
	 * @since   1.0
	 */
	public static function stripIframes($string)
	{
		return preg_replace('#(<[/]?iframe.*>)#U', '', $string);
	}
}

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