function esiExpression($expression)
{
/* Regexp now matches $(HTTP_COOKIE{stuff});
TODO:
Add matching for:
[v] $(HTTP_COOKIE{stuff}|default)
[v] $(HTTP_COOKIE{stuff}|'default blah')
Add variable replacement for:
[v] HTTP_ACCEPT_LANGUAGE
[v] HTTP_HOST
[v] HTTP_REFERER
[v] QUERY_STRING
HTTP_USER_AGENT
FIXME: ariadne cookies are serialized by default, which would break HTTP_COOKIE usage in other ESI processors
*/
$result = preg_replace_callback('!\\$\\(([^)|{]*)(\\{(([^}]*))\\})?(\\|([^)]*))?\\)!', function ($matches) {
// print_r($matches);
switch ($matches[1]) {
case 'HTTP_COOKIE':
$cookie = ldGetUserCookie($matches[3]);
$default = preg_replace("/^'(.*?)'\$/", "\$1", $matches[6]);
return $cookie ? $cookie : $default;
break;
case 'HTTP_HOST':
$host = ldGetServerVar('HTTP_HOST');
$default = preg_replace("/^'(.*?)'\$/", "\$1", $matches[6]);
return $host ? $host : $default;
break;
case 'HTTP_REFERER':
$referer = ldGetServerVar('HTTP_REFERER');
$default = preg_replace("/^'(.*?)'\$/", "\$1", $matches[6]);
return $referer ? $referer : $default;
break;
case 'HTTP_ACCEPT_LANGUAGE':
$acceptLanguage = ldGetServerVar('HTTP_ACCEPT_LANGUAGE');
$acceptLanguage = strtolower(str_replace(", ", ",", $acceptLanguage));
$languages = explode(",", $acceptLanguage);
if (in_array(strtolower($matches[3]), $languages)) {
return 1;
}
return 0;
break;
case 'QUERY_STRING':
$value = ar_loader::getvar($matches[3], "GET");
$default = preg_replace("/^'(.*?)'\$/", "\$1", $matches[6]);
return isset($value) ? $value : $default;
break;
}
}, $expression);
return $result;
}
public function getvar($name)
{
global $ARCurrent, $ARConfig;
if ($ARCurrent->arCallStack) {
$arCallArgs = end($ARCurrent->arCallStack);
if ($name == 'arCallArgs') {
return $arCallArgs;
}
if (isset($arCallArgs[$name])) {
return $arCallArgs[$name];
}
} else {
if ($name == 'arCallArgs') {
return ar_loader::getvar();
}
}
if (isset($ARCurrent->{$name})) {
return $ARCurrent->{$name};
}
return ar_loader::getvar($name);
}