php - php循环会话变量

Question

尝试基于会话变量运行循环。在第一页加载没有会话。当它设置会话时，我设置会话变量和警报。

问题是，它会提醒每个页面加载:(

`
<!-- language: lang-php -->

$check = $_SESSION['cache'];  

if ($check == "xYx") {  

echo $word;  
} else {  

session_start();  
?><script>alert ("Im reading it again !")</script><?  

echo $word;  
$_SESSION['cache'] = "xYx";  
}  

`

Answer 1

$check = $_SESSION['cache'];

发生在之前

session_start();

这是行不通的。

Answer 2

只需这样做：

session_start();
$check = $_SESSION['cache'];  

if ($check == "xYx") {  

echo $word;  
} else {  

?><script>alert ("Im reading it again !")</script><?  

echo $word;  
$_SESSION['cache'] = "xYx";  
}

正如评论所说，这只是简单地session_start()开始。