Javascript 从 Jquery 获取 PHP $_SESSION 变量？
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Get a PHP $_SESSION variable from Jquery?
提问by khaverim
I'm not yet a JSON/AJAX master so I don't know how to do this.
我还不是 JSON/AJAX 大师，所以我不知道如何做到这一点。
I need a $_SESSION['name'] PHP variable to work with in my jQuery stuff and I don't know how to access it... consider:
我需要一个 $_SESSION['name'] PHP 变量来处理我的 jQuery 内容，但我不知道如何访问它......考虑：
// the 'who is typing' shindig
$.ajax(
{
url: "whos_typing.html",
cache: false,
success: function(whos)
{
// here I need to access $_SESSION['name'] and do stuff with it
$("#soandso").html(whos); //Insert who's typing into the #soandso
}
});
回答by Makita
You'll need to inject it, something like this:
你需要注入它，像这样：
var sessName = '<?php echo $_SESSION['name']?>';
The file containing this script must be executed by the php interpreter (i.e. a .php file)
包含此脚本的文件必须由 php 解释器执行（即 .php 文件）
EDIT: Conceding to Radu's point, it would be safer execute for unsanitized data:
编辑：承认 Radu 的观点，对未经消毒的数据执行会更安全：
var sessName = <?php echo json_encode($_SESSION['name']) ?>;
回答by Greg Rozmarynowycz
You need to use $.postto retrieve the variable from the server. You would have something like this:
您需要使用$.post从服务器检索变量。你会有这样的事情：
$.post('echoMyVar.php', {post: 1}, function(data){
myVar = data['myVar'];
});
This is very basic, you first need to check if datais not null. In echoMyVar.php, you need just need basically the following:
这是非常基本的，您首先需要检查是否data不为空。在 echoMyVar.php 中，您基本上只需要以下内容：
header('Content: application/json', 1);
$returnVal = array('myVar', $_SESSION['myVar']);
echo json_encode($returnVal);
Again this is a shell, not secure, and would not handle any errors.
同样，这是一个外壳，不安全，不会处理任何错误。
回答by palerdot
var name= "<?php echo $_SESSION['user_name'];?>"
will do it . . .
会做的 。. .
Rememberphp is a server side script, . . .so it takes precedence and get executed first and spits html to the client (Jquery , javacript) which will be executed in your browser . . . .
记住php 是一个服务器端脚本，. . .so 它优先并首先执行并将 html 吐出到将在您的浏览器中执行的客户端（Jquery，javacript）。. . .
So, you can use server side variables to share with client . . . but not the other way around . . .
因此，您可以使用服务器端变量与客户端共享。. . 但反过来不行。. .
回答by Alex Kalicki
The easiest way is probably to include your javascript code in a .php file. Then you can simply do:
最简单的方法可能是将您的 javascript 代码包含在 .php 文件中。然后你可以简单地做：
var phpVar = <?php echo $_SESSION['name']; ?>
回答by Eugene Naydenov
Server side in whos_typing.php:
whos_typing.php 中的服务器端：
<?php
//...
header('Content-Type: application/json');
echo json_encode(array(
'who'=>'Bob',
'session'=>$_SESSION,
// Be sure that you're not storing any sensitive data in $_SESSION.
// Better is to create an array with the data you need on client side:
// 'session'=>array('user_id'=>$_SESSION['user_id'], /*etc.*/),
));
exit(0);
Client side:
客户端：
// the 'who is typing' shindig
$.ajax({
url: "whos_typing.php",
dataType: 'json',
cache: false,
success: function(data) {
var session = data.session,
who = data.who;
console.log(session.user_id); // deal with session
$("#soandso").html(who); //Insert who's typing into the #soandso
}
});
回答by Jordan
You need to echothe session variable from PHP when you send it to the browser. I'm assuming whos_typing.html is just the URL to a PHP script.
echo当您将会话变量发送到浏览器时，您需要从 PHP 获取会话变量。我假设 whos_typing.html 只是 PHP 脚本的 URL。
