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
16 * @return mixed evaluated value of parameter or $default
17 * @throws SmartyException if parameter is not a literal (but an expression, variable, …)
20 function smarty_literal_compiler_param($params, $index, $default = null)
22 // not set, go default
23 if (!isset($params[$index])) {
26 // test if param is a literal
27 if (!preg_match('/^([\'"]?)[a-zA-Z0-9-]+(\\1)$/', $params[$index])) {
28 throw new SmartyException('$param[' . $index . '] is not a literal and is thus not evaluatable at compile time');
32 eval("\$t = " . $params[$index] . ";");