这段代码为什么无法加入链接啊-PHP Tutorial-php.cn

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这段代码为什么无法加入链接啊

Jun 23, 2016 pm 02:14 PM

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<html> <head>  <title> New Document </title> </head> <body>	  <?php$link   = mysql_connect( '127.0.0.1', 'root', '520928' ) or die( mysql_error() );//连接数据库服务器          mysql_select_db( 'test' );//选择数据库          mysql_set_charset( 'utf8' );//设置字符编码              $sql = "SELECT * FROM wxtree";//查询分类表          $result = mysql_query( $sql );            $tree = array();//初始化一个数组          while( $row  = mysql_fetch_assoc( $result ) )                 {                 	                      $tree[$row['fid']][$row['id']]  = $row['cat_name'];//创建分类数组                                                                   }          mysql_close( $link );//关闭数据库		          print_r($tree[02]);echo '-------------------------------------------' . "\n"; //递归函数  function for_category( $arr = array(), $arr2 ){	 	    echo "<ul>";    foreach ( $arr as $k => $v )    {           if ( isset( $arr2[$k] ) && is_array( $arr2[$k] ) )        {          	   echo "<li>$k $v<td>  &nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp<td><a href="http://www.w3school.com.cn">W3School</a>&nbsp添加</td><td>&nbsp编辑&nbsp</td><td>&nbsp删除&nbsp</td>" ;        	               for_category( $arr2[$k], $arr2 );                        echo "</li>";                  }        else{             echo "<li>$k $v<td>  &nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp<td><a href="http://www.w3school.com.cn">W3School</a>&nbsp添加</td><td>&nbsp编辑&nbsp</td><td>&nbsp删除&nbsp</td> </li>" ;        }                  }     echo "</ul>";     }   for_category( $tree[0], $tree );?><a href="http://www.w3school.com.cn">W3School</a> </body></html>//链接正确，这里 echo "<li>$k $v<td>  &nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp<td><a href="http://www.w3school.com.cn">W3School</a>&nbsp添加</td><td>&nbsp编辑&nbsp</td><td>&nbsp删除&nbsp</td>" ;        加入链接，为什么报错

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回复讨论(解决方案)

报错的原因是双引号中的双引号没有转义

但修改后依然不会达到你的目的
因为 td 标记不予许单独出现在 li 标记中

那怎么办，还需要加

tr、td 只能出现在 table 中

加入table之后，就没有之前的效果了，

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