如何从PHP / AJAX / jQuery中的表单外的JavaScript变量中保存数据？(How to save data from a JavaScript variable outside the form in PHP/AJAX/jQuery?)

 PHP新手在这里。 我想在PHP / MySQL中保存一个变量（来自jQuery），但是这个变量在表单之外。 表格中的表单元素的值虽然保存得很好。 在这种情况下，变量名称是'mode'，我希望'mode'被发送到PHP。 
 
 这是代码： 
 
 HTML表单; 
 
<form action="submit.php" method="post" id="myform">
 <textarea id="source1" name="source1"></textarea>
<textarea id="source2" name="source2"></textarea>
 <input type="image" src="images/save.png" name="submit" id="submit" title="Save"  class="save-button"/>    
</form>
 
 jQuery / AJAX： 
 
mode = 1;  // This value needs to be stored/saved

// AJAX form save
$("form#myform").submit( function () {    
$.post(
'submit.php',
$(this).serialize(),
function(data){
....
}
);
 
 PHP： 
 
$submit_time = date('Y/m/d H:i:s');
$content1 = $_POST['source1'];
$content2 = $_POST['source2'];
$mode = $_POST['mode'];  // This value needs to be stored/saved
 
 是否在表单内创建隐藏表单字段的解决方案？ 

PHP newbie here. I want to save a variable (from jQuery) in PHP/MySQL, but this variable is outside the form. The values from the form elements inside the form is being saved fine though. The variable name in this case is 'mode', and I want the 'mode' to be sent to PHP.
 
Here's code :
 
HTML form;
 
<form action="submit.php" method="post" id="myform">
 <textarea id="source1" name="source1"></textarea>
<textarea id="source2" name="source2"></textarea>
 <input type="image" src="images/save.png" name="submit" id="submit" title="Save"  class="save-button"/>    
</form>
 
jQuery / AJAX:
 
mode = 1;  // This value needs to be stored/saved

// AJAX form save
$("form#myform").submit( function () {    
$.post(
'submit.php',
$(this).serialize(),
function(data){
....
}
);
 
PHP:
 
$submit_time = date('Y/m/d H:i:s');
$content1 = $_POST['source1'];
$content2 = $_POST['source2'];
$mode = $_POST['mode'];  // This value needs to be stored/saved
 
Is the solution to create a hidden form field inside the form? 

原文：https://stackoverflow.com/questions/20167997