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<?php
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/**
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 * This variable parser uses PHP's internal code engine. Because it does
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 * this, it can represent all inputs; however, it is dangerous and cannot
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 * be used by users.
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 */
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class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
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{
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    /**
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     * @param mixed $var
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     * @param int $type
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     * @param bool $allow_null
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     * @return null|string
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     */
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    protected function parseImplementation($var, $type, $allow_null)
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    {
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        return $this->evalExpression($var);
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    }
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    /**
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     * @param string $expr
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     * @return mixed
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     * @throws HTMLPurifier_VarParserException
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     */
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    protected function evalExpression($expr)
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    {
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        $var = null;
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        $result = eval("\$var = $expr;");
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        if ($result === false) {
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            throw new HTMLPurifier_VarParserException("Fatal error in evaluated code");
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        }
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        return $var;
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    }
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}
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// vim: et sw=4 sts=4