shared.literal_compiler_param.php
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shared.literal_compiler_param.php
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	<?php
	/**
	* Smarty plugin
	*
	* @package Smarty
	* @subpackage PluginsShared
	*/

	/**
	* evaluate compiler parameter
	*
	* @param array $params parameter array as given to the compiler function
	* @param integer $index array index of the parameter to convert
	* @param mixed $default value to be returned if the parameter is not present
	* @return mixed evaluated value of parameter or $default
	* @throws SmartyException if parameter is not a literal (but an expression, variable, …)
	* @author Rodney Rehm
	*/
	function smarty_literal_compiler_param($params, $index, $default=null)
	{
	// not set, go default
	if (!isset($params[$index])) {
	return $default;
	}
	// test if param is a literal
	if (!preg_match('/^([\'"]?)[a-zA-Z0-9]+(\\1)$/', $params[$index])) {
	throw new SmartyException('$param[' . $index . '] is not a literal and is thus not evaluatable at compile time');
	}

	$t = null;
	eval("\$t = " . $params[$index] . ";");
	return $t;
	}