如何在WP会话中存储和接收变量？

默认情况下,wordpress中未启用会话,如果您要激活php会话,请在functions.php的开头添加此选项:

 if (!session_id()) {
    session_start();
}
 

您现在可以使用$_SESSION['your-var'] = 'your-value';来设置会话变量.看看有关会话的PHP文档.

更新:

还有第二个答案,在我看来,这个答案也很有价值-不幸的是它被删除了,我在这里重新添加信息.答案是指 WP Session Manager 由@eamann编写的插件,作为替代解决方案.
我读了一些有关该插件的内容,但从未使用过,因为-到目前为止-我坚持使用PHP会话-从未遇到无法使用它们的问题.这是声明/评论通过插件作者本人,我发现了一些可能的优点.

Sessions aren't enabled in wordpress by default, if you want to activate php sessions add this at the beginning of your functions.php:

if (!session_id()) {
    session_start();
}

You now can use $_SESSION['your-var'] = 'your-value'; to set a session variable. Take a look at the PHP documentation on sessions.

Update:

There was a second answer, which, in my mind, had a value too - unfortunately it got deleted, I'm re-adding the information here. The answer was referring to WP Session Manager a plugin written by @eamann as a alternative solution.
I read some things about the plugin, but never used it because - so far - I'm sticking with PHP sessions - never had the problem that I couldn't use them. This is a statement/comment by the plugin author himself I found about some possible advantages.

将此添加到您的functions.php中

 <?php

function tatwerat_startSession() {
    if(!session_id()) {
        session_start();
    }
}

add_action('init', 'tatwerat_startSession', 1);
 

add this at in your functions.php

<?php

function tatwerat_startSession() {
    if(!session_id()) {
        session_start();
    }
}

add_action('init', 'tatwerat_startSession', 1);

我将解释如何使用 WordPress的本地PHP会话插件设置用户名会话.您可以将这种逻辑应用于您的问题.

将此添加到您的functions.php文件中

 if (!session_id()) {
    session_start();
}

  if ( isset( $_POST['wp-submit'] ) ){

    $_SESSION['username']=$_POST['log'];

  }
 

$ _ POST ['log']从wordpress登录表单引用用户名输入框.用户登录时,用户名将存储到$ _SESSION ['username']. 在您的情况下,您可以将" log"更改为具有" car_color"的表单变量名称.

稍后在其他一些php文件中引用用户名,

 $username=$_SESSION['username'];
 

I will explain how to set a username session with the Native PHP Sessions for WordPress plugin. You can apply this logic to your problem.

Add this to your functions.php file

if (!session_id()) {
    session_start();
}

  if ( isset( $_POST['wp-submit'] ) ){

    $_SESSION['username']=$_POST['log'];

  }

$_POST['log'] is referencing the username input box from the wordpress login form. When a user logs in, the username is stored to $_SESSION['username']. In your case, you would change 'log' to the form variable names you have 'car_color'.

Reference the username later in some other php file by

$username=$_SESSION['username'];

Wordpress中可能没有常规会话……无论如何,Wordpress知道用户的概念.您可以使用 add_user_meta 功能管理与特定用户有关的信息, update_user_meta , get_user_meta 和 delete_user_meta .

如果您需要以这种方式保存在JavaScript中的信息,则可以编写一个小的PHP脚本来呕吐所需的内容,并使用Ajax进行调用.

Maybe there are no usual sessions in Wordpress ... anyway, Wordpress knows the concept of users. You can manage information related to specific users with the the functions add_user_meta, update_user_meta, get_user_meta, and delete_user_meta.

If you need the information saved in this way in JavaScript, you can write a little PHP script that vomits what you need, and call it with Ajax.

在接收AJAX请求的PHP页面上,像这样设置$ _SESSION.

 $car_color = <user selected form input data>;
$_SESSION['car_color'] = $car_color;
 

访问$ _SESSION变量

 if(isset($_SESSION['car_color'])) {
    $value = $_SESSION['car_color'];
} else {
    $value = 'Please select a car color.';
}
 

本教程详细介绍了正确的设置和会议的处置.

On the PHP page that receives the AJAX request, set $_SESSION like this.

$car_color = <user selected form input data>;
$_SESSION['car_color'] = $car_color;

Access the $_SESSION variable

if(isset($_SESSION['car_color'])) {
    $value = $_SESSION['car_color'];
} else {
    $value = 'Please select a car color.';
}

This tutorial goes into more detail about proper setup and disposal of sessions.

您必须首先在WordPress中启动会话,但不能像这样那样在WordPress中启动会话.

在开始会话之前,您需要检查某些插件是否较早启动了会话,因为您可能会遇到意外问题.因此,您需要为此使用一些算法.

 if (version_compare(PHP_VERSION, '7.0.0', '>=')) {
    if(function_exists('session_status') && session_status() == PHP_SESSION_NONE) {
        session_start(apply_filters( 'cf_geoplugin_php7_session_options', array(
          'cache_limiter' => 'private_no_expire',
          'read_and_close' => false
       )));
    }
}
else if (version_compare(PHP_VERSION, '5.4.0', '>=') && version_compare(PHP_VERSION, '7.0.0', '<'))
{
    if (function_exists('session_status') && session_status() == PHP_SESSION_NONE) {
        session_cache_limiter('private_no_expire');
        session_start();
    }
}
else
{
    if(session_id() == '') {
        if(version_compare(PHP_VERSION, '4.0.0', '>=')){
            session_cache_limiter('private_no_expire');
        }
        session_start();
    }
}
 

我还在这里添加了对旧PHP版本的支持.

You must first start a session in WordPress but you can't start a session in WordPress just like that.

Before starting sessions, you need to check if some plugin started the session earlier because you may have unexpected problems. So you need a little algorithm for that.

if (version_compare(PHP_VERSION, '7.0.0', '>=')) {
    if(function_exists('session_status') && session_status() == PHP_SESSION_NONE) {
        session_start(apply_filters( 'cf_geoplugin_php7_session_options', array(
          'cache_limiter' => 'private_no_expire',
          'read_and_close' => false
       )));
    }
}
else if (version_compare(PHP_VERSION, '5.4.0', '>=') && version_compare(PHP_VERSION, '7.0.0', '<'))
{
    if (function_exists('session_status') && session_status() == PHP_SESSION_NONE) {
        session_cache_limiter('private_no_expire');
        session_start();
    }
}
else
{
    if(session_id() == '') {
        if(version_compare(PHP_VERSION, '4.0.0', '>=')){
            session_cache_limiter('private_no_expire');
        }
        session_start();
    }
}

I've also added support for older PHP versions here.