1 <?php
2 /**
3 * Smarty plugin
4 *
5 * @package Smarty
6 * @subpackage PluginsShared
7 */
9 /**
10 * evaluate compiler parameter
11 *
12 * @param array $params paramter array as given to the compiler function
13 * @param integer $index array index of the paramter to convert
14 * @param mixed $default value to be returned if the paramter is not present
15 * @return mixed evaluated value of paramter or $default
16 * @throws SmartyException if paramter is not a literal (but an expression, variable, …)
17 * @author Rodney Rehm
18 */
19 function smarty_literal_compiler_param($params, $index, $default=null)
20 {
21 // not set, go default
22 if (!isset($params[$index])) {
23 return $default;
24 }
25 // test if param is a literal
26 if (!preg_match('/^([\'"]?)[a-zA-Z0-9]+(\\1)$/', $params[$index])) {
27 throw new SmartyException('$param[' . $index . '] is not a literal and is thus not evaluatable at compile time');
28 }
30 $t = null;
31 eval("\$t = " . $params[$index] . ";");
32 return $t;
33 }