6 * @subpackage PluginsShared
10 * evaluate compiler parameter
12 * @param array $params parameter array as given to the compiler function
13 * @param integer $index array index of the parameter to convert
14 * @param mixed $default value to be returned if the parameter is not present
15 * @return mixed evaluated value of parameter or $default
16 * @throws SmartyException if parameter is not a literal (but an expression, variable, …)
19 function smarty_literal_compiler_param($params, $index, $default=null)
21 // not set, go default
22 if (!isset($params[$index])) {
25 // test if param is a literal
26 if (!preg_match('/^([\'"]?)[a-zA-Z0-9]+(\\1)$/', $params[$index])) {
27 throw new SmartyException('$param[' . $index . '] is not a literal and is thus not evaluatable at compile time');
31 eval("\$t = " . $params[$index] . ";");