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Span variable not being read in php

I have a website that receives parameters in the URL address (www.xxx.html?name=David)
then I assign the value to the html text like this:
<span name="uname" id="uname"> </span>, I'd like to thank you
<script src="//code.jquery.com/jquery-1.12.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var userName = getParameterByName('uname');
document.getElementById("uname").textContent = userName;
});
</script>
up to this point everything works well
now when I try to read again the value in uname in the PHP file in order to send it in the email I have two issues
the parameter is not received - emailText = $_POST['uname'];
when trying to debug I see the HTML file and js file being loaded and can be debugged but the PHP file doesn't exist in the file tree of the debug
BUT it is being loaded and read because other variables are being read and sent correctly to the email.

When submitting a form the user agent (browser) will build a form data set from
"Succesful controls".
A Control is one of the following:
buttons
checkboxes
radio buttons
menus
text input
file select
hidden controls
object controls
Only these fields will be submitted when you submit a form. A <span> is not part of that.
If you want to add a value with JavaScript to the form that is not inside of a text input, I suggest that you use a hidden input to do so.
<input name="uname" type="hidden" value="value">
When you edit the span, you should then also change this hidden field to the same value.

You cannot use span with name attribute.
Read this
https://www.w3schools.com/tags/tag_span.asp
If you want to post, use form + proper input element.
https://www.w3schools.com/html/html_form_input_types.asp
And still, it's not very clear you are really trying to do, show us the whole page ...

If I need to get value of span ill do something like this
<span data-name="someTextHere">...</span> # data-name will not visible in browser unless page source mode
and you can access it by using ($(this).data('name'))
Ex
var userName = ($(this).data('name'));
And this article Submit Form Using Ajax, PHP and jQuery will helps
you to pass data without Undefined Index Error.

Print the HTML form with User Filled Information/Data

I have HTML form and I would like to print the HTML form, with the User Filled Information/Content.
Is there exist any way in jQuery or JavaScript to get a HTML Form with user filled values and print it?
This is what I have tried
$(form).html() but it returns only empty form
$(document).find("form").html() which also returned html with empty form.
NOTE: I am not talking about serialize function here. I don't want to submit a form but want to convert form to a printable version by setting input, select background transparent.

You can use
$('form').find('input').each(function( key, value ) {
console.log(value);
});
And to get the data ready for POST or something like it use this
$('form').serialize();

I think I got your issue. What you are actually want is, to print the HTML form, but it should contain the User Input.
First and foremost, you can use the 'window.print()' method. If you want to print only the Form, then you should use some CSS tricks.
I guess, what you are looking is answered in the following SO Questions. Please check out.
Javascript print web form with user input included
How to print only a selected HTML element?
If you are still not able to get your solution done, then let me know. Let me see how I can help you. Good Luck.

How do I access form data submitted by a user in Javascript?

I'm relatively new to programming, but understand the basics of HTML, CSS, and Javascript (including jQuery). Due to my greenness, I'd appreciate it if answers contained both a simple solution and a reason as to why the solution works. Thanks!
So I've got a form, with a text input and a submit button:
<form>
<input type="text">
<button type="submit">Submit</button>
</form>
When the user types data into the text field and clicks submit, how do I gain access to this data? If a user inputs their name, how do I grab that information? I don't intend to store it or write it anywhere, just to hold onto it as a variable in javascript, which I'll assign to a jQuery cookie.
So how do I access the data that the user has submitted, preferably using only Javascript (with jQuery)? Thanks for the help!

You access the data on the server side (in PHP via $_POST['username'] for example). The form sends data to your sever for any named input, so you would probably have to change the input to:
<input type=text name=username>
If you want to access it on the client side (with JavaScript), you can do that too, but you have to prevent the form from submitting:
$("form").on('submit', function (e) {
$.cookie('username', $(this).find('[name=username]').val());
//stop form from submitting
e.preventDefault();
});

say you had an html input tag such as:
<input id="textfield" type="text">
using javascript, you can store the value of that field in a variable like this:
var inputvalue = $('#textfield').val();
of course, you'll need something to run the script.
the reason this works is that the the textfield is an object. you might think of it as a tree trunk with different branches coming out. one of these "branches" is the value contained inside of it. since you know jquery, you know that $('#textfield') gets the element by a selector. the period says we're getting one of the branches, and "value" says we want the branch that tells what's in the textfield.
hope this helps.

mvc 3 razor cannot clear form value with validation class

I'm using MVC 3 with Razor and using unobtrusive client validation. Things are working great, but I want to be able to reset the form if a user decides he wants to start over or cancel his action. It seems that there is a lot of meta data attached to each form element when using the validation.
<input type="text" value="" name="User.FirstName" id="User_FirstName" data-val-required="The First Name field is required." data-val-length-max="50" data-val-length="The field FirstName must be a string with a maximum length of 50." data-val="true" class="text-box single-line">
The jQuery snippet here shows my problem. When you try to manually reset the value of the text field, some other javascript is intercepting execution after I clear the value and it sets it back to what it was:
$("#btnReset").click(function () {
alert($("#User_FirstName").val());
$("#User_FirstName").val("");
alert($("#User_FirstName").val());
});
I'm looking for pointers here on how to clear form values when a user clicks a button. It seems like such a simple task, but I can find no documentation how to accomplish this and I haven't found anything here or elsewhere to help.

I was using an html input of type reset rather than the button type. The reset should not have been used in this case.

how to insert value in input, with javascript

So I tried to do something like this -
$('#price').val(price);
price is 300, and it shows good on browser, in input field, but when I want to take it out and mail it with PHP, in $_POST['price'] it doesn't show up, How can I insert something in inputs value with JavaScript, so I can mail it? It seems this is not an insertion in value, but just a feature to display something, correct?

Maybe this code can help you
document.getElementById('yorInputID').value = "Your Value";

There are a few possible reasons:
1) Your input field is not inside the form.
2) You are actually using a GET and not a POST.
Assuming that you can see the value updated in Firebug or Chrome's equivalent, it's gotta be one of those. Switch over to using $_REQUEST and see if that changes anything.

Your input for #price needs to also have a name "price"
<input id="price" value="price" />
From your question I'm assuming that this input is hidden -- and if that's the case I want to advise you not to rely on hidden fields + Javascript to provide you with security. It's so easily hackable I wouldn't even call it hacking.

Make sure the input is not "disabled" when the form submits.
if it's disabled the form don't send it.