Question

我有PHP注意：未定义的索引：错误日志中的langid 以下是它定义的代码，以便了解我的代码有什么问题

<?php 

if(($_SESSION['langid'])!="" ){

    $langid=$_SESSION['langid'];
    $_SESSION['langid']=$langid;


    if(isset($_REQUEST['langid']) && $_REQUEST['langid']!="" ){
        $langid=$_REQUEST['langid'];
        $_SESSION['langid']=$langid;
    }else{

    }

}else{
$langid=1;
$_SESSION['langid']=$langid;



if(isset($_REQUEST['langid']) && $_REQUEST['langid']!="" ){
    $langid=$_REQUEST['langid'];
    $_SESSION['langid']=$langid;
}else{

}
}

Answer 1

尝试：

<?php

if ( isset($_SESSION['langid']) )
{

    $langid=$_SESSION['langid'];
    $_SESSION['langid']=$langid;


    if(isset($_REQUEST['langid']) && $_REQUEST['langid']!="" ){
        $langid=$_REQUEST['langid'];
        $_SESSION['langid']=$langid;
    }else{

    }

}else{
$langid=1;
$_SESSION['langid']=$langid;



if(isset($_REQUEST['langid']) && $_REQUEST['langid']!="" ){
    $langid=$_REQUEST['langid'];
    $_SESSION['langid']=$langid;
}else{

}
}

?>

你将不会有关于警告的通知。但代码没有意义：

$langid=$_SESSION['langid'];
$_SESSION['langid']=$langid;

毫无意义

php通知未定义的索引会话

1 个答案: