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✏️ Editing: modifier.escape.php

<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsModifier
 */

/**
 * Smarty escape modifier plugin
 *
 * Type:     modifier<br>
 * Name:     escape<br>
 * Purpose:  escape string for output
 *
 * @link http://www.smarty.net/manual/en/language.modifier.count.characters.php count_characters (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param string  $string        input string
 * @param string  $esc_type      escape type
 * @param string  $char_set      character set, used for htmlspecialchars() or htmlentities()
 * @param boolean $double_encode encode already encoded entitites again, used for htmlspecialchars() or htmlentities()
 * @return string escaped input string
 */
function smarty_modifier_escape($string, $esc_type = 'html', $char_set = null, $double_encode = true)
{
    static $_double_encode = null;
    if ($_double_encode === null) {
        $_double_encode = version_compare(PHP_VERSION, '5.2.3', '>=');
    }
    
    if (!$char_set) {
        $char_set = Smarty::$_CHARSET;
    }

switch ($esc_type) {
        case 'html':
            if ($_double_encode) {
                // php >=5.3.2 - go native
                return htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);
            } else {
                if ($double_encode) {
                    // php <5.2.3 - only handle double encoding
                    return htmlspecialchars($string, ENT_QUOTES, $char_set);
                } else {
                    // php <5.2.3 - prevent double encoding
                    $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
                    $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
                    $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
                    return $string;
                }
            }

case 'htmlall':
            if (Smarty::$_MBSTRING) {
                // mb_convert_encoding ignores htmlspecialchars()
                if ($_double_encode) {
                    // php >=5.3.2 - go native
                    $string = htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);
                } else {
                    if ($double_encode) {
                        // php <5.2.3 - only handle double encoding
                        $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
                    } else {
                        // php <5.2.3 - prevent double encoding
                        $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
                        $string = htmlspecialchars($string, ENT_QUOTES, $char_set);
                        $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
                        return $string;
                    }
                }
                
                // htmlentities() won't convert everything, so use mb_convert_encoding
                return mb_convert_encoding($string, 'HTML-ENTITIES', $char_set);
            }

// no MBString fallback
            if ($_double_encode) {
                return htmlentities($string, ENT_QUOTES, $char_set, $double_encode);
            } else {
                if ($double_encode) {
                    return htmlentities($string, ENT_QUOTES, $char_set);
                } else {
                    $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
                    $string = htmlentities($string, ENT_QUOTES, $char_set);
                    $string = str_replace(array('%%%SMARTY_START%%%', '%%%SMARTY_END%%%'), array('&', ';'), $string);
                    return $string;
                }
            }

case 'url':
            return rawurlencode($string);

case 'urlpathinfo':
            return str_replace('%2F', '/', rawurlencode($string));

case 'quotes':
            // escape unescaped single quotes
            return preg_replace("%(?<!\\\\)'%", "\\'", $string);

case 'hex':
            // escape every byte into hex
            // Note that the UTF-8 encoded character ä will be represented as %c3%a4
            $return = '';
            $_length = strlen($string);
            for ($x = 0; $x < $_length; $x++) {
                $return .= '%' . bin2hex($string[$x]);
            }
            return $return;

case 'hexentity':
            $return = '';
            if (Smarty::$_MBSTRING) {
                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
                $return = '';
                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
                    $return .= '&#x' . strtoupper(dechex($unicode)) . ';';
                }
                return $return;
            }
            // no MBString fallback
            $_length = strlen($string);
            for ($x = 0; $x < $_length; $x++) {
                $return .= '&#x' . bin2hex($string[$x]) . ';';
            }
            return $return;

case 'decentity':
            $return = '';
            if (Smarty::$_MBSTRING) {
                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
                $return = '';
                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
                    $return .= '&#' . $unicode . ';';
                }
                return $return;
            }
            // no MBString fallback
            $_length = strlen($string);
            for ($x = 0; $x < $_length; $x++) {
                $return .= '&#' . ord($string[$x]) . ';';
            }
            return $return;

case 'javascript':
            // escape quotes and backslashes, newlines, etc.
            return strtr($string, array('\\' => '\\\\', "'" => "\\'", '"' => '\\"', "\r" => '\\r', "\n" => '\\n', '</' => '<\/'));

case 'mail':
            if (Smarty::$_MBSTRING) {
                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_str_replace.php');
                return smarty_mb_str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);
            }
            // no MBString fallback
            return str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);

case 'nonstd':
            // escape non-standard chars, such as ms document quotes
            $return = '';
            if (Smarty::$_MBSTRING) {
                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
                foreach (smarty_mb_to_unicode($string, Smarty::$_CHARSET) as $unicode) {
                    if ($unicode >= 126) {
                        $return .= '&#' . $unicode . ';';
                    } else {
                        $return .= chr($unicode);
                    }
                }
                return $return;
            }

$_length = strlen($string);
            for ($_i = 0; $_i < $_length; $_i++) {
                $_ord = ord(substr($string, $_i, 1));
                // non-standard char, escape it
                if ($_ord >= 126) {
                    $return .= '&#' . $_ord . ';';
                } else {
                    $return .= substr($string, $_i, 1);
                }
            }
            return $return;

default:
            return $string;
    }
}

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