PHP/JavaScript未定义索引错误 [英] Php/javascript undefined index error

问题描述

当我在php中声明我的下拉列表时，我有一个未定义的索引

$ selectAction =''< select id ="compAction" name ="compAction" style ="font-size:12px" onChange ="actionSelect()，document.redemptionsForm.submit();">'';
foreach($ arr as $ option => $ item){
$ selectAction.="< option id =". $ item. " value =". $ item. ".
((($ compAction == $ item)?''selected'':''''). >" . $ item. </option> \ n";

}
$ selectAction.=</select>";

Hi,i have a undefined index when I declare my dropdown in php like this

$selectAction = ''<select id="compAction" name="compAction" style="font-size: 12px" onChange="actionSelect(),document.redemptionsForm.submit();">'';
foreach($arr as $option => $item){
$selectAction .= "<option id=''" . $item . "'' value=''" . $item . "'' " .
(($compAction == $item)?''selected'':'' '') . ">" . $item . "</option>\n";

}
$selectAction.="</select>";


what could the issue be?

推荐答案

selectAction =''< select id ="compAction" name ="compAction" style ="font-size:12px" onChange ="actionSelect()，document.redemptionsForm.submit();">'';
foreach(

selectAction = ''<select id="compAction" name="compAction" style="font-size: 12px" onChange="actionSelect(),document.redemptionsForm.submit();">'';
foreach(

arr as

option =>

option =>

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