blocks|key|409221|text|"...how使每个脚本实例的会话变量绝对唯一？“|type|unstyled|depth|inlineStyleRanges|entityRanges|data|409222|基本上答案是，“你不能。”这是因为浏览器的所有实例(窗口和选项卡)共享相同的cookie+jar。因此，这两个实例返回相同的cookie，并且它们连接到相同的会话。这在“现实生活”中很少出现问题，但正如您现在所看到的，它会让开发人员抓狂;-)|409223|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

"...how to make session variable absolutely unique per every script instance?"

Basically the answer is, "You can't." This is because all instances of the browser (windows and tabs) share the same cookie jar. So both instances return the same cookie and they are connected to the same session. It's rarely a problem in "real life" but it drives developers nuts, as you have now seen ;-)

blocks|key|191146|text|+<?php
++++++++//Start+session
++++++++session_start();
++++++++//Check+whether+the+session+variable+SESS_MEMBER_ID+is+present+or+not
++++++++if+(!isset($_SESSION['id'])+%7C%7C+($_SESSION['id']+==+''))+{
++++++++++++header("location:+index.php");
++++++++++++exit();
++++++++}

++++++++$session_id=$_SESSION['id'];
++++++++?>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|191147|和文件连接|unstyled|191148|+<?php

+class+DbConnector+{

+var+$theQuery;
+var+$link;

+function+DbConnector(){

++++//+Get+the+main+settings+from+the+array+we+just+loaded
++++$host+=+'localhost';
++++$db+=+'';
++++$user+=+'root';
++++$pass+=+'';

++++//+Connect+to+the+database
++++$this->link+=+mysql_connect($host,+$user,+$pass);
++++mysql_select_db($db);
++++register_shutdown_function(array(&$this,+'close'));

}

+++//***+Function:+query,+Purpose:+Execute+a+database+query+***
function+query($query)+{

++++$this->theQuery+=+$query;
++++return+mysql_query($query,+$this->link);

}

//***+Function:+fetchArray,+Purpose:+Get+array+of+query+results+***
function+fetchArray($result)+{

++++return+mysql_fetch_array($result);

}

//***+Function:+close,+Purpose:+Close+the+connection+***
function+close()+{

++++mysql_close($this->link);

}

}

?>|191149|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code> &lt;?php
 //Start session
 session_start();
 //Check whether the session variable SESS_MEMBER_ID is present or not
 if (!isset($_SESSION['id']) || ($_SESSION['id'] == '')) {
 header("location: index.php");
 exit();
 }

 $session_id=$_SESSION['id'];
 ?&gt;
</code></pre>

and file connection

<pre><code> &lt;?php

 class DbConnector {

 var $theQuery;
 var $link;

 function DbConnector(){

 // Get the main settings from the array we just loaded
 $host = 'localhost';
 $db = '';
 $user = 'root';
 $pass = '';

 // Connect to the database
 $this-&gt;link = mysql_connect($host, $user, $pass);
 mysql_select_db($db);
 register_shutdown_function(array(&amp;$this, 'close'));

}

 //*** Function: query, Purpose: Execute a database query ***
function query($query) {

 $this-&gt;theQuery = $query;
 return mysql_query($query, $this-&gt;link);

}

//*** Function: fetchArray, Purpose: Get array of query results ***
function fetchArray($result) {

 return mysql_fetch_array($result);

}

//*** Function: close, Purpose: Close the connection ***
function close() {

 mysql_close($this-&gt;link);

}

}

?&gt;
</code></pre>

blocks|key|191212|text|您可以使用session_name($unique_script_instance_name)+-+https://www.php.net/manual/en/function.session-name.php来完成此操作|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|191213|您所需要做的就是为脚本的每个实例定义一个唯一的名称，这样，例如，如果您在共享服务器上有两个不同的应用程序安装，您可以为一个提供名称A，为第二个提供名称B，您可以将该值存储为$unique_script_instance_name。|191214|然后，在调用session_start()之前，需要调用session_name()|191215|//+One+script
$unique_script_instance_name+"A";
session_name($unique_script_instance_name);
session_start();

...

//+Second+script
$unique_script_instance_name+"B";
session_name($unique_script_instance_name);
session_start();

...|code-block|syntax|javascript|191216|这样一来，两个脚本都将拥有自己的会话“域”，并且彼此隔离。这样的话|191217|entityMap|0|LINK|mutability|MUTABLE|url|https://www.php.net/manual/en/function.session-name.php^0|5|16|1E|1J|0|0|2E|S|0|6|F|S|E|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1C|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1D|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

You can do this using <code>session_name($unique_script_instance_name)</code> - <a href="https://www.php.net/manual/en/function.session-name.php" rel="nofollow noreferrer">https://www.php.net/manual/en/function.session-name.php</a>

All you need to do is to define a unique name for each instance of your script, so that for example if you have 2 separate installations of your application on a shared server, you provide name A for one and B for second, you can store this value as <code>$unique_script_instance_name</code>.

Then before you call <code>session_start()</code> you need to call <code>session_name()</code>

<pre><code>// One script
$unique_script_instance_name "A";
session_name($unique_script_instance_name);
session_start();

...

// Second script
$unique_script_instance_name "B";
session_name($unique_script_instance_name);
session_start();

...
</code></pre>

That way both scripts will have its own session "domain" and will be isolated from each other.
That way

blocks|key|191248|text|请记住，会话只是一个变量。您绝对可以为每个页面创建一个唯一的会话变量。对于每个get请求，将创建一个新的唯一会话变量。您所需要做的就是创建唯一的会话名称。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|191249|<?php
+session_start();
+$_SESSION[$_GET['pid'].'_p1']+=+"a+session+value";
+$_SESSION[$_GET['pid'].'_p2']+=+"a+session+value";
+$_SESSION[$_GET['pid'].'_p3']+=+"a+session+value";
?>|code-block|syntax|javascript|191250|例如，如果你访问http://example.com/?pid=1232|offset|length|style|CODE|191251|会话名称将类似于$_SESSION['1232_p1'];|191252|对于每个get请求，将创建一个新的唯一会话。|191253|要查看所有会话变量，请在页面末尾使用以下代码：|191254|<?php
echo+'<pre>';
print_r($_SESSION);
echo+'</pre>';
?>|191255|entityMap^0|0|0|8|S|0|8|L|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@$I|12|J|13|K|L]]|9|@]|A|$]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

Remember that a session is just a variable. You can definitely create a unique session variable for each page. For each get request a new unique session variable will be created. All you need to do is to create sessions' names unique.

<pre><code>&lt;?php
 session_start();
 $_SESSION[$_GET['pid'].'_p1'] = "a session value";
 $_SESSION[$_GET['pid'].'_p2'] = "a session value";
 $_SESSION[$_GET['pid'].'_p3'] = "a session value";
?&gt;
</code></pre>

So for example, if you visit <code>http://example.com/?pid=1232</code>

The session name will be something like <code>$_SESSION['1232_p1'];</code>

For each get request a new unique session will be created.

To see all your session variables, use this code at the end of your page:

<pre><code>&lt;?php
echo '&lt;pre&gt;';
print_r($_SESSION);
echo '&lt;/pre&gt;';
?&gt;
</code></pre>

blocks|key|191322|text|这是一个非常古老的问题，但我写它是为了供其他程序员或新手朋友使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|191323|只需为来自客户端的每个请求设置一个验证页面，以检查会话变量。例如：valid_ref.php或者在你的源代码中的所有页面使用一个引用页面，并根据客户端的请求调用其他页面。例如：index.php+or+home.php+or+ref.php+in+valid_ref.php检查$_SESSION[SCRIPT_NAME]['filter_data']是否在会话中，当客户端打开新的标签时，你的web应用使用$_SESSION[SCRIPT_NAME]['filter_data']中的以前的数据，这样你就不会有任何问题，浏览器中的新标签来自一个客户端。|offset|length|style|CODE|191324|entityMap^0|0|X|D|2G|W|3V|11|5O|11|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]|$D|N|E|O|F|G]|$D|P|E|Q|F|G]|$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|I|$]]

This is a very old question, but I am writing it for the use of other programmer or novice friends.
Just set a validation page for every request from client to check session variables.
for example: <code>valid_ref.php</code>
Or use a reference page for all page in your source code and call other pages according to client requests in the reference page.for example: <code>index.php or home.php or ref.php</code>
in valid_ref.php check if <code>$_SESSION[SCRIPT_NAME]['filter_data']</code> was in session , when client open new tab your web app use Previous data in <code>$_SESSION[SCRIPT_NAME]['filter_data']</code>'s and with this way you dont have any problem with new tabs in browsers from one client.

Well, let's say I have a php-script, that has some select box, and I want to store the selected value in session array. Till now I assigned the value to my session array using the following construction: 

<pre><code>$_SESSION[SCRIPT_NAME]['filter_data']
</code></pre>

SCRIPT_NAME is a constant where I put script name, this is to make session variable unique per every php-script. Everything is fine till the moment when user opens the same script in two or more tabs to work simultaneously. In this case variables mixes and things go wrong... 

May be you have any ideas how to make session variable absolutely unique per every script instance? Or any advice how to achieve functionality different way?

I now, I can pass my variables in URL, but I don't like this option. I want to use session and I want every script of my web-application remember users' choices during the whole user login session

How to make session variables unique per every php-script instance?

服务器

好吧，假设我有一个php-script，它有一些选择框，我想把选定的值存储在会话数组中。到目前为止，我使用以下结构将值赋值给会话数组：$_SESSION[SCRIPT_NAME]['filter_data']SCRIPT_NAME是一个常量，我将脚本名称放在这里，这是为了让每个php脚本的会话变量都是唯一的。一切都很好...

问如何让每个php-script实例的会话变量都是唯一的？
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