258 lines
9.7 KiB
PHP
258 lines
9.7 KiB
PHP
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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
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* Name: escape
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* Purpose: escape string for output
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*
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* @link https://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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{
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static $_double_encode = true;
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static $is_loaded_1 = false;
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static $is_loaded_2 = false;
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if (!$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(
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array(
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'%%%SMARTY_START%%%',
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'%%%SMARTY_END%%%'
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),
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array(
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'&',
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';'
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),
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$string
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);
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return $string;
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}
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}
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// no break
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case 'htmlall':
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if (Smarty::$_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 =
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str_replace(
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array(
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'%%%SMARTY_START%%%',
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'%%%SMARTY_END%%%'
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),
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array(
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'&',
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';'
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),
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$string
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);
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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(
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array(
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'%%%SMARTY_START%%%',
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'%%%SMARTY_END%%%'
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),
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array(
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'&',
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';'
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),
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$string
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);
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return $string;
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}
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}
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// no break
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case 'url':
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return rawurlencode($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::$_MBSTRING) {
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if (!$is_loaded_1) {
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if (!is_callable('smarty_mb_to_unicode')) {
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include_once SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php';
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}
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$is_loaded_1 = true;
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}
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$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::$_MBSTRING) {
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if (!$is_loaded_1) {
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if (!is_callable('smarty_mb_to_unicode')) {
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include_once SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php';
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}
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$is_loaded_1 = true;
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}
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$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 $return;
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case 'javascript':
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// escape quotes and backslashes, newlines, etc.
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return strtr(
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$string,
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array(
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'\\' => '\\\\',
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"'" => "\\'",
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'"' => '\\"',
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"\r" => '\\r',
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"\n" => '\\n',
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'</' => '<\/',
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// see https://html.spec.whatwg.org/multipage/scripting.html#restrictions-for-contents-of-script-elements
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'<!--' => '<\!--',
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'<s' => '<\s',
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'<S' => '<\S'
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)
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);
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case 'mail':
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if (Smarty::$_MBSTRING) {
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if (!$is_loaded_2) {
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if (!is_callable('smarty_mb_str_replace')) {
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include_once SMARTY_PLUGINS_DIR . 'shared.mb_str_replace.php';
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}
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$is_loaded_2 = true;
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}
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return smarty_mb_str_replace(
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array(
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'@',
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'.'
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),
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array(
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' [AT] ',
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' [DOT] '
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),
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$string
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);
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}
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// no MBString fallback
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return str_replace(
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array(
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'@',
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'.'
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),
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array(
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' [AT] ',
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' [DOT] '
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),
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$string
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);
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case 'nonstd':
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// escape non-standard chars, such as ms document quotes
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$return = '';
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if (Smarty::$_MBSTRING) {
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if (!$is_loaded_1) {
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if (!is_callable('smarty_mb_to_unicode')) {
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include_once SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php';
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}
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$is_loaded_1 = true;
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}
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foreach (smarty_mb_to_unicode($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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trigger_error("escape: unsupported type: $esc_type - returning unmodified string", E_USER_NOTICE);
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return $string;
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}
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}
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