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modifier.escape.php
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<?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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