1 <?php

     2 /**

     3  * Smarty plugin

     4  *

     5  * @package    Smarty

     6  * @subpackage PluginsShared

     7  */

     8 

     9 /**

    10  * evaluate compiler parameter

    11  *

    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  *

    16  * @return mixed evaluated value of parameter or $default

    17  * @throws SmartyException if parameter is not a literal (but an expression, variable, …)

    18  * @author Rodney Rehm

    19  */

    20 function smarty_literal_compiler_param($params, $index, $default = null) {

    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     }

    29 

    30     $t = null;

    31     eval("\$t = " . $params[$index] . ";");

    32 

    33     return $t;

    34 }