drkxgs9358
2014-10-21 08:34
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未定义的变量：类中的_SESSION

Strange Situation. I have a Projects Class which has the following constructor

public function __construct($db){
    $this->db = $db;
    $this->lang = strtolower($_SESSION['la']);
}

I'm using AJAX to call a simple get() function but the error returned is

<b>Notice</b>:  Undefined variable: _SESSION in <b>D:\Sites\proman\class\Projects.php</b> on line <b>10</b><br />

In my index.php I have session_start() so that's not the problem. I can even print_r($_SESSION) in the construct method and i see the session variable of 'la'.##

I tried adding session_start() also to the top of my Projects.php class but then I get the warning that session has already started.

This is my session init at the top of index.php ## it also set's a default language (la) variable if none is chosen by the user

<?php
    session_start();
    if(!isset($_SESSION['la'])) $_SESSION['la'] = "EN";
?>

This is the output of the print_r() in the Projects Constructor ## Array ( [la] => FR ) Any idea whay might be going wrong here? Thanks!

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奇怪的情况。 我有一个Projects类，它有以下构造函数 

  public function __construct（$ db）{
 $ this-＆gt; db = $ db; 
 $ this-＆gt  ; lang = strtolower（$ _ SESSION ['la']）; 
} 
   
 
 
我正在使用AJAX来调用一个简单的get（）函数但错误 返回 
 
 
 ＆lt; b＆gt;注意＆lt; / b＆gt ;:未定义变量：_SESSION in＆lt; b＆gt; D：\ Sites \ proman \ class \ Projects.php＆lt; / b＆gt  ; 在线＆lt; b＆gt; 10＆lt; / b＆gt;＆lt; br /＆gt; 
   
 
 
在我的index.php中，我有session_start（），所以这不是问题。 我甚至可以在构造方法中print_r（$ _ SESSION），我看到'la'的会话变量。##  
 
 
我尝试将session_start（）添加到我的项目顶部。  php类，但后来我得到会话已经开始的警告。 
 
 
这是我在index.php顶部的会话init ## 
it也设置了默认语言（la）变量 如果用户没有选择 
 
 
 ＆lt;？php 
 session_start（）; 
 if（！isset（$ _ SESSION ['la']））$ _SESSION [  'la'] =“EN”; 
？＆gt; 
   
 
 
这是Projects Constructor ## 
 Array中print_r（）的输出（  [la] =＆gt; FR）
任何想法都可能在这里出错？
谢谢！
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1条回答 默认 最新

  • du13520157325 2014-10-21 09:18
    最佳回答

    I think 

    <b>Notice</b>:  Undefined variable: _SESSION in <b>D:\Sites\proman\class\Projects.php</b> on line <b>10</b><br />

    is the result of your ajax call. Right?

    The issue is that you are missing session_start() in the file requested with ajax. I think the file is Projects.php in you class. Since you are using ajax, not include/require the session_start() on your index.php page is not sufficient. Separate session_start() is needed for the ajax page (Projects.php here).

    Add a new session_start() on your ajax page(Projects.php) and let me know whether it fixed the issue.

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