library/smarty/libs/plugins/modifier.escape.php
author Markus Bröker <broeker.markus@googlemail.com>
Sat, 14 Nov 2015 02:40:44 +0100
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Request::hasPost: Array ist immer gesetzt, Inhalt variiert
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<?php
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/**
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 * Smarty plugin
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 *
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 * @package    Smarty
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 * @subpackage PluginsModifier
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 */
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/**
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 * Smarty escape modifier plugin
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 * Type:     modifier<br>
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 * Name:     escape<br>
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 * Purpose:  escape string for output
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 *
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 * @link   http://www.smarty.net/docs/en/language.modifier.escape
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 * @author Monte Ohrt <monte at ohrt dot com>
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 *
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 * @param string $string input string
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 * @param string $esc_type escape type
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 * @param string $char_set character set, used for htmlspecialchars() or htmlentities()
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 * @param boolean $double_encode encode already encoded entitites again, used for htmlspecialchars() or htmlentities()
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 *
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 * @return string escaped input string
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 */
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function smarty_modifier_escape($string, $esc_type = 'html', $char_set = null, $double_encode = true) {
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    static $_double_encode = null;
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    if ($_double_encode === null) {
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        $_double_encode = version_compare(PHP_VERSION, '5.2.3', '>=');
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    }
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    if (!$char_set) {
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        $char_set = Smarty::$_CHARSET;
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    }
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    switch ($esc_type) {
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        case 'html':
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            if ($_double_encode) {
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                // php >=5.3.2 - go native
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                return htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);
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            } else {
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                if ($double_encode) {
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                    // php <5.2.3 - only handle double encoding
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                    return htmlspecialchars($string, ENT_QUOTES, $char_set);
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                } else {
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                    // php <5.2.3 - prevent double encoding
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                    $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
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                    $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
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                    $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
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                    return $string;
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                }
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            }
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        case 'htmlall':
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            if (Smarty::$_MBSTRING) {
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                // mb_convert_encoding ignores htmlspecialchars()
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                if ($_double_encode) {
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                    // php >=5.3.2 - go native
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                    $string = htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);
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                } else {
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                    if ($double_encode) {
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                        // php <5.2.3 - only handle double encoding
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                        $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
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                    } else {
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                        // php <5.2.3 - prevent double encoding
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                        $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
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                        $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
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                        $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
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                        return $string;
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                    }
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                }
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                // htmlentities() won't convert everything, so use mb_convert_encoding
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                return mb_convert_encoding($string, 'HTML-ENTITIES', $char_set);
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            }
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            // no MBString fallback
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            if ($_double_encode) {
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                return htmlentities($string, ENT_QUOTES, $char_set, $double_encode);
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            } else {
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                if ($double_encode) {
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                    return htmlentities($string, ENT_QUOTES, $char_set);
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                } else {
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                    $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
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                    $string = htmlentities($string, ENT_QUOTES, $char_set);
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                    $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
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                    return $string;
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                }
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            }
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        case 'url':
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            return rawurlencode($string);
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        case 'urlpathinfo':
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            return str_replace('%2F', '/', rawurlencode($string));
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        case 'quotes':
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            // escape unescaped single quotes
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            return preg_replace("%(?<!\\\\)'%", "\\'", $string);
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        case 'hex':
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            // escape every byte into hex
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            // Note that the UTF-8 encoded character ä will be represented as %c3%a4
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            $return = '';
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            $_length = strlen($string);
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            for ($x = 0; $x < $_length; $x++) {
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                $return .= '%' . bin2hex($string[$x]);
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            }
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            return $return;
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        case 'hexentity':
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            $return = '';
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            if (Smarty::$_MBSTRING) {
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                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
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                $return = '';
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                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
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                    $return .= '&#x' . strtoupper(dechex($unicode)) . ';';
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                }
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                return $return;
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            }
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            // no MBString fallback
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            $_length = strlen($string);
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            for ($x = 0; $x < $_length; $x++) {
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                $return .= '&#x' . bin2hex($string[$x]) . ';';
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            }
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            return $return;
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        case 'decentity':
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            $return = '';
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            if (Smarty::$_MBSTRING) {
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                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
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                $return = '';
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                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
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                    $return .= '&#' . $unicode . ';';
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                }
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                return $return;
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            }
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            // no MBString fallback
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            $_length = strlen($string);
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            for ($x = 0; $x < $_length; $x++) {
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                $return .= '&#' . ord($string[$x]) . ';';
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            }
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            return $return;
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        case 'javascript':
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            // escape quotes and backslashes, newlines, etc.
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            return strtr($string, array('\\' => '\\\\', "'" => "\\'", '"' => '\\"', "\r" => '\\r', "\n" => '\\n', '</' => '<\/'));
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        case 'mail':
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            if (Smarty::$_MBSTRING) {
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                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_str_replace.php');
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                return smarty_mb_str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);
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            }
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            // no MBString fallback
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            return str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);
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        case 'nonstd':
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            // escape non-standard chars, such as ms document quotes
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            $return = '';
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            if (Smarty::$_MBSTRING) {
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                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
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                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
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                    if ($unicode >= 126) {
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                        $return .= '&#' . $unicode . ';';
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                    } else {
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                        $return .= chr($unicode);
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                    }
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                }
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                return $return;
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            }
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            $_length = strlen($string);
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            for ($_i = 0; $_i < $_length; $_i++) {
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                $_ord = ord(substr($string, $_i, 1));
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                // non-standard char, escape it
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                if ($_ord >= 126) {
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                    $return .= '&#' . $_ord . ';';
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                } else {
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                    $return .= substr($string, $_i, 1);
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                }
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            }
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            return $return;
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        default:
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            return $string;
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    }
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}