php实现批量添加多行文本框 一行一个textarea

$act=!empty($_GET['act']) ? trim($_GET['act']) : ''; 
switch($act) { 
    case 'adda': 
        $area['a_value'] = trim($_POST['a_value']); 
        $area['a_type']=3; 
       if(strpos($area['a_value'], "\n") === false) { 
           //echo $area['a_value'];  @郑州网建
           //add($area); 
           //$DB->insert('bcrh_article_attr',$area); 
       }else{ 
           $areanames = explode("\n", $area['a_value']); 
           foreach($areanames as $areaname) { 
               $areaname = trim($areaname); 
               if(!$areaname) continue; 
               //echo $areaname.'|'; 
               $area['a_value'] = $areaname; 
               //$DB->insert('bcrh_article_attr',$area); 
           } 
       } 
       header("refresh:0;url=camnpr.php");//跳转页面，注意路径 @camnpr
       exit; 

       break; 
} 
 

<form method="post" action="?act=adda" onsubmit="return Dcheck();" > 
    <table cellpadding="2" cellspacing="1" class="tb"> 
       <tr> 
           <td class="tl"><span class="f_hid">*</span> 属性</td> 
           <td> 
            <!--@郑州网建 camnpr-->
            <textarea name="a_value" id="a_value" style="width:200px;height:100px;overflow:visible;"></textarea> 
            允许批量添加，一行一个，点回车换行</td> 
        </tr> 
    </table> 
    <div class="sbt"><input type="submit" name="submit" value="确 定" class="btn"> <input type="reset" name="reset" value="重 置" class="btn"></div> 
</form>