注意：未定义的索引：第108行的C：\ xampp \ htdocs \ Inventory \ lib \ config.php中的NAME

Question

我已经调试了一个小的开源php脚本并且发现此错误消息可能有人请给我一些解释它有什么问题吗？

非常感谢提前

这里提到的是：

function HNDCData($parser,$cdata) {
        $cdata = str_replace("[amp]","&",$cdata);
        //echo "<br>" . $cdata;
        // create the proper tree node if NAME attribute is set
        if ($this->attr["NAME"] != "")
            $this->tags[count($this->tags) - 1] = $this->attr["NAME"];

和完整的php文件：

   <?php

    class CConfig extends CXMLParser {
        /**
        * current depth in xml tree
        *
        * @var int
        *
        * @access private
        */
        var $depth = 0;

        /**
        * depth tags parser helper
        *
        * @var array
        *
        * @access private
        */
        var $tags = array();

        /**
        * config tree
        *
        * @var array
        *
        * @access public
        */
        var $vars = array();

        /**
        * creates the xml parser and optionally loads a config file
        *
        * @param string $file_name  config file name to load
        *
        * @return void
        *
        * @access public
        */
        function CConfig($file_name = "") {
            parent::CXMLParser();

            if ($file_name != "")
                $this->Load($file_name);
        }

        /**
        * xml parser open tag handler
        *
        * @param object $parser actual expat parser
        * @param string $tag    current xml tag
        * @param array $attr    current tag attributes
        *
        * @return void
        *
        * @acces private
        */
        function HNDTagOpen($parser,$tag,$attr) {//echo "<pre>";
            // call parent to save tag and attr info for cdata handler
            parent::HNDTagOpen($parser,$tag,$attr);

            // expand helper tag array
            $this->tags[$this->depth] = $tag;
            $this->depth++;

            // prepare dynamic code for attr handling
            foreach ($this->tags as $key => $val)
                $code[] = "\"" . strtolower($val) . "\"";

            // build code
            $node = implode("][",$code);
            $code = "foreach (\$attr as \$key => \$val) if (\$key != \"NAME\") \$this->vars[$node][strtolower(\$key)] = \"\$val\"; else \$this->vars[\$attr[\"NAME\"]][strtolower(\"\$key\")] = \"\$val\";";

            // and finally execute
            eval($code);
        }

        /**
        * close tag handler
        *
        * @param object $parser actual expat parser
        * @param string $tag    current xml tag
        *
        * @return void
        *
        * @access private
        */
        function HNDTagClose($parser,$tag) {
            // compress helper tag array
            unset($this->tags[$this->depth]);
            $this->depth--;
        }

        /**
        * character data handler
        *
        * @param object $parser actual expat parser
        * @param string $cdata  current tag character data
        *
        * @return void
        *
        * @access private
        */
        function HNDCData($parser,$cdata) {
            $cdata = str_replace("[amp]","&",$cdata);
            //echo "<br>" . $cdata;
            // create the proper tree node if NAME attribute is set
            if ($this->attr["NAME"] != "")
                $this->tags[count($this->tags) - 1] = $this->attr["NAME"];

            // cleanup cdata
            $cdata = trim($cdata);
            //$cdata = preg_replace("/(\015\012)|(\015)|(\012)/","",$cdata);

            // only parse if cdata not void
            if ($cdata != "") {
                //print_r($this->attr);
                //echo "<br>" . $cdata;

                // prepare dynamic code
                foreach ($this->tags as $key => $val)
                    $code[] = "\"" . strtolower($val) . "\"";

                // build code
                $code = "\$this->vars[" . implode("][",$code) . "] = \"" . $cdata . "\";";

                // and finally execute
                eval($code);
            }
        }

        /**
        * load the config file and parse it
        *
        * @param string $file_name  config filename to load
        *
        * @return void
        *
        * @acces public
        */
        function Load($file_name) {
            parent::Parse($this->data = str_replace("&","[amp]",GetFileContents($file_name)));
            $this->vars = ArrayReplace("[amp]" , "&" , $this->vars );
        }
    }
    ?>

Answer 1

变化：

if ($this->attr["NAME"] != "")

要：

if ( isset( $this->attr["NAME"] ) && $this->attr["NAME"] != "")