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/** * xarTpl__XarPINode: <xar:pi /> tag class * * Generates a processing instruction * @package blocklayout * @access private */class xarTpl__XarPINode extends xarTpl__TplTagNode{    function __construct(&$parser, $tagName, $parentTagName='', $parameters=array())    {        parent::__construct($parser, $tagName, $parentTagName, $parameters);    }        function render()    {                if (!array_key_exists('target', $this->attributes)) {            $this->raiseError(XAR_BL_MISSING_ATTRIBUTE,'Missing \'target\' attribute in <xar:pi> tag.');            return;        }        $target = $this->attributes['target'];        unset($this->attributes['target']);                $attributes = '';        foreach ($this->attributes as $k => $v) {            $attributes .= $k.'="'.$v.'"';        }        return "echo '<?$target $attributes ?>'";    }}?>