将会话变量传递给 javascript [英] Passing Session variables to javascript

问题描述

在 ExpressionEngine 模板中，我在这样的 javascript 文件中设置 PHP 会话变量:(是的，EE 将解析 PHP 并将值添加到 javascript)

In an ExpressionEngine template, I'm setting a PHP session variable in a javascript file like this: (Yes, EE will parse the PHP and add plug the values to the javascript)

<?php session_start(); ?>  
function check_someone_else_result(data) {
  waiting_list_flag = false;
   <?php $_SESSION['waiting_list_flag'] = false;  ?>
  if(data.CanBuy=='YES'){
    show_for_someone_else();
  } else {
    waiting_list_flag = true;
   <?php $_SESSION['waiting_list_flag'] = true;  ?>
    $('#sm_content .oblcontent').html($('#waiting_list').html());
    $('#sm_content a.closebtn').click(function(){location.reload(true);});
    $('#sm_content a.yeswaitbtn').click(function(){show_for_someone_else();});
  } // if(data.CanBuy=='YES')
} // function check_someone_else_result

现在，在 show_for_someone_else() 函数中，我正在重定向到另一个加载另一个 javascript 文件的页面，并且我正在尝试将一个 javascript 变量设置为与我将会话变量设置为相同的值.

Now, in the show_for_someone_else() function, I'm redirecting to another page that loads another javascript file and I'm trying to set a javascript variable to the same value that I set the session variable to above.

<?php session_start(); ?>
   var CART_URL          = '{site_url}store/checkout/cart/';
   $(document).ready(function(){
     // attach the validationEngine to the form
     $("#voucher_form").validationEngine('attach', {
                      scroll: false
     }); // $("#voucher_form").validationEngine

     // handles the NExt button click
     $('#checkout-step-billing a').click(function(){
      $('#checkout-step-billing .voucher_form').submit();
     }); // $('#checkout-step-billing a').click

     // handles keypresses in all the fields in the form to submit the 
     // form when the press enter
     $("#checkout-step-billing .voucher_form input").keypress(function (e) {
      if ((e.which && e.which == 13) || (e.keyCode && e.keyCode == 13)) {
        $('#checkout-step-billing .voucher_form').submit();
        return false;
      } else {
        return true;
      }
     }); // $("#checkout-step-billing .voucher_form input").keypress

     // set the wait_list_flag from the session variable
     var wait_list_flag = <?php $_SESSION['waiting_list_flag']; ?>   
   }); // $(document).ready

但我什么也没得到.

我需要怎么做?

推荐答案

 var wait_list_flag = <?php $_SESSION['waiting_list_flag']; ?>   

应该

 var wait_list_flag = <?php echo $_SESSION['waiting_list_flag']; ?>;
                            ^^^^                                   ^

没有回显，PHP 块不会输出任何内容，因此不会将任何内容插入到 Javascript 块中.您还缺少 javascript 中的尾随分号，这也可能导致致命的解析错误.

Without the echo, the PHP block doesn't output anything, so nothing gets inserted into the Javascript block. You're also missing the trailing semicolon in the javascript, which may also cause a fatal parse error.

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