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36 lines
1.0 KiB
36 lines
1.0 KiB
<?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, $default = null)
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{
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// not set, go default
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if (!isset($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[' . $index .
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'] is not a literal and is thus not evaluatable at compile time');
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}
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$t = null;
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eval("\$t = " . $params[ $index ] . ";");
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return $t;
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}
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