library/smarty/libs/plugins/shared.literal_compiler_param.php
author Markus Broeker<broeker.markus@googlemail.com>
Sun, 14 Feb 2016 22:24:29 +0100
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permissions -rw-r--r--
Umstellung auf Composer
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<?php
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/**
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 * Smarty plugin
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 *
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 * @package    Smarty
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 * @subpackage PluginsShared
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 */
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/**
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 * evaluate compiler parameter
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 *
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 * @param array $params parameter array as given to the compiler function
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 * @param integer $index array index of the parameter to convert
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 * @param mixed $default value to be returned if the parameter is not present
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 *
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 * @return mixed evaluated value of parameter or $default
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 * @throws SmartyException if parameter is not a literal (but an expression, variable, …)
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 * @author Rodney Rehm
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 */
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function smarty_literal_compiler_param($params, $index, $default = null) {
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    // not set, go default
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    if (!isset($params[$index])) {
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        return $default;
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    }
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    // test if param is a literal
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    if (!preg_match('/^([\'"]?)[a-zA-Z0-9-]+(\\1)$/', $params[$index])) {
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        throw new SmartyException('$param[' . $index . '] is not a literal and is thus not evaluatable at compile time');
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    }
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    $t = null;
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    eval("\$t = " . $params[$index] . ";");
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    return $t;
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}