Develop Reference

Javascript button click change / create PHP variable on same page

I have searched stackoverflow for the past hour and have found similar questions but attempting the solution has given me only errors - it may be as I am trying to load it on the same page.
I have tried saving the value to a cookie in JS then loading it in php, also attempted through ajax, etc.
From what I've read it can't just be done within as PHP is server side and Javascript is browser side which I get.
I currently have a .html page with a form that sends values through POST:
form.html
<form id="calc" form name="calculator" method="post" action="/calculate.php">
The solution is not with the form, I can't have hidden fields as I need to user input. I could have a radio box in the form yes and then get the value that way, but that's not my question. My question is how I can get the user's input and turn it into php on the page the form redirects to calculate.php:
calculate.php
<?php
if(isset($_POST['submit'])){
$x= $_POST['value'];
echo "your something:";
echo $x;
?>
Click button below for option one to do this, or click two for that, or three for something else...
<button id="one"> one </button>
<script>
$(document).ready(
function() {
$("#one").click(function() {
make php value 1
});
</script>
use php value from click
So the user will already have clicked submit. Then be redirected onto the .php page with their inputs, they can then choose button 1, 2 or 3 for example through javascript on calculate.php NOT the form.
My problem is I need to know on the same page - calculate.php, which button has been clicked in php. So that I can use their input and do different things with it depending on which button.
Is it possible to get a value to be set or create one from a button click on calculate.php itself with the javascript button producing a php value on the same page? Does it need to be loaded from an external.php page through ajax? Is there any other way?

PHP Option:
<?php
if(isset($_POST['submit'])){
$x= (isset($_POST['one'])) ? $_POST['one'] : '';
$y = (isset($_POST['two'])) ? $_POST['two'] : '';
$z = (isset($_POST['three'])) ? $_POST['three'] : '';
echo "your something:";
echo $x;
echo $y;
echo $z;
?>
<form name="calculator" method="post">
<INPUT TYPE="RADIO" NAME="one" VALUE="1"> ONE
<INPUT TYPE="RADIO" NAME="two" VALUE="2"> TWO
<INPUT TYPE="RADIO" NAME="three" VALUE="3"> THREE
<input type="submit" value="Submit">
</form>
JS mode:
if(isset($_POST)){
$value= (isset($_POST['value'])) ? $_POST['value'] : '';
$previous = (isset($_POST['previous'])) ? $_POST['previous'] : '';
//play with value and previous one
$x = //your algorithm;
echo "your something:";
echo $x;
?>
<form name="calculator" method="post">
<button type="button" value='1'>ONE</button>
<button type="button" value='2'>TWO</button>
<button type="button" value='3'>THREE</button>
<input name='value' type='hidden' value=''>
<input name='previous' type='hidden' value='<?= (isset($x)) ? $x : ''?>'>
</form>
<script>
$(document).ready(
function() {
$("button").click(function() {
$('input[name=value]').val($(this).val());
$('form').submit();
});
</script>
use php value from click

Loading Effect using JS and PHP

I am working on a project in PHP and AIML where the bot replies to the user queries asked by a user through a microphone. I am new to jQuery and JS so I need help in implementing loading effect in between the user input and final output.
<?php
$display = "";
$thisFile = __FILE__;
if (!file_exists('../../config/global_config.php'));
require_once ('../../config/global_config.php');
require_once ('../chatbot/conversation_start.php');
$get_vars = (!empty($_GET)) ? filter_input_array(INPUT_GET) : array();
$post_vars = (!empty($_POST)) ? filter_input_array(INPUT_POST) : array();
$form_vars = array_merge($post_vars, $get_vars); // POST overrides and overwrites GET
$bot_id = (!empty($form_vars['bot_id'])) ? $form_vars['bot_id'] : 1;
$say = (!empty($form_vars['say'])) ? $form_vars['say'] : '';
$convo_id = session_id();
$format = (!empty($form_vars['format'])) ? $form_vars['format'] : 'html';
?>
<!DOCTYPE html>
<html>
<head>
<title>Interact With Sia</title>
<script src="jquery.js"></script>
<script type="text/javascript" src="talk.js"></script>
</head>
<body onload='document.getElementById("say").focus(); document.getElementById("btn_say").style.display="none";'>
<center>
<h3>Talk to Sia</h3>
<form id="chatform1" name="chatform" method="post" action="index.php#end" >
<!-- <label for="say">Say:</label> -->
<input type="text" name="say" id="say" size="70" onmouseover="startDictation()" style="color:red" />
<input type="submit" class="say" name="submit" id="btn_say" value="say" />
<script>
$('#say').trigger('mouseover');
</script>
<input type="hidden" name="convo_id" id="convo_id" value="<?php echo $convo_id;?>" />
<input type="hidden" name="bot_id" id="bot_id" value="<?php echo $bot_id;?>" />
<input type="hidden" name="format" id="format" value="<?php echo $format;?>" />
</form>
<br/><br/>
<?php echo $display; ?> //THIS DISPLAYS THE OUTPUT TO THE QUERY
</center>
</body>
</html>
As soon as the page loads, the microphone in the user's browser is activated [via talk.js_startDictation()] and after the user finishes the voice input, the query is sent to the scripts and then the result is diplayed by <?php echo $display; ?>.
How can I implement a loading effect in place of <?php echo $display; ?> until the script returns the result of the query and updates the $display variable on the page?

You could use AJAX to archieve this, like:
1 - Load jquery.js (you could use CDN or download it).
2 - Create a div with a loader (usually a gif is fine, there are a lot). Hidde it with css: display:hidden;
3 - Add at the bottom of your page:
<script>
// Attach a submit handler to the form
$( "#chatform1" ).submit(function( event ) {
// Start the loader
$('#loader').show();
// Stop form from submitting normally
event.preventDefault();
// Get some values from elements on the page:
var data = $(this).serialize();
var url = "urlToYourPhpFile.php";
// Send the data using post
var posting = $.post( url, { data: data } );
// Put the results in a div
posting.done(function( dataResponse ) {
//do something with dataResponse
$('#loader').hide();
});
});
</script>
When the form is sumitted, jquery 'catch' the request, process the .submit() functions and send the data via post to a .php file (you should create it) and receive the params with $_POST. Something like:
yourPhpFile.php
<?php
$convo_id = $data['convo_id'];
//do something
...
?>

How can I reloaded URL link, that it stay the same after I click on submit button

I have simple form:
<div class="form-style-2">
<form action="" name="formular" id="formular" method="GET">
<label for="actual_position"><span>From: <span class="required"></span></span><input name="actual_position" type="text" maxlength="512" id="actual_position" class="searchField"
<?php if(!empty($actual_position)){ ?>
value="<?php echo $_GET['actual_position']?>"
<?php
}else {
?> value = ""; <?php
} ?>/></label>
<label for="final_position"><span>To: <span class="required"></span></span><input name="final_position" type="text" maxlength="512" id="final_position" class="searchField" <?php if(!empty($final_position)){ ?>
value="<?php echo $_GET['final_position']?>"
<?php
}else {
?> value = ""; <?php
} ?>/></label>
<input type="submit" value="Find path" />
And another multiselect in form who gets values form url link and compere with database and get som results. Here is a code:
<table width= "570px">
<tr><td width="200px" style="align:center"><b>Waypoints:</b> <br>
<tr><td width="370px"><select style="float:center; margin-left:5px" multiple id="waypoints">
if(!empty($urls)){
foreach($urls as $url){
if($result = $conn->query("SELECT * FROM $table where $ID = '$url' "));
$atraction = $result->fetch_array(); ?>
<option value="<?php echo $atraction['lat']. "," . $atraction['lon']; ?>"
> <?php echo "<b>".$atrction['City']. ", " . $atraction['Name'];?> </option>
<?php
}
}
?>
</select></td></tr>
<br>
</table>
</form>
And getting ID-s from url code:
if(!empty($_GET[$ID])){
$urls = $_GET[$ID];
foreach($urls as $url){
// echo $url;
}
}
... and after submit, it Post to URL some variables like this:
http://127.0.0.1/responsiveweb/travel.php?actual_position=Paris&final_position=Praha&ID[]=23&ID[]=15&ID[]=55
... very important for me are ID-s values ... but when I change for example actual position and then submit I lost my ID-s and I get something like this: http://127.0.0.1/responsiveweb/travel.php?actual_position=Berlin&final_position=Praha
Can you help me how to get after clicking on submit button full url link? Thanks

I had some trouble understanding your question OP, but I think I understood somehow what you ment, so I decided to try giving you a answer.
I have re-written your code, and tried to make somehow better code-structure. I have also used form method POST in my example, so you can see how you can change the get data on the redirection url.
See my code example here: http://pastebin.com/wQ7QCBmt
I also decided to use the form method POST instead of GET, so you can easily do back-end tasks, and extend your link if neccessary. You could also add more data to the link even when using GET. You could add an hidden input inside your form, example:
<input type="hidden" name="more_data" value="a_value" />

send php post variable to url using javascript when button is clicked

I have a php page which gets $page and $user using post method, I also have a button that i want, to open a URL in the same window using $page and $user variables when clicked, to use them with $_GET[] function.
i want my URL be like:
http://www.test.com/test.php?page=$page&user=$user
my code is like this:
<?php
$page=$POST_['page'];
$user=$POST_['user'];
<?
<html>
<head>
function openurl() {
var user=<?php echo "$user";?>;
var page=<?php echo "$page";?>;
open('www.test.com/test.php?page='+page'&user='+user,'_self');
}
</head>
<body>
<button onclick="openurl()" type="button">open url</button>
</body>
</html>

There is no need for scripting at all
If you want GET:
<?php
$page=$GET_['page']; // should be sanitized and you can use REQUEST for either
$user=$GET_['user'];
$parm = "page=".$page."&user=".$user;
?>
Open URL
If you need to post:
<form action="test.php" method="post">
<input type="hidden" name="page" value="<?php echo $page; ?>"/>
<input type="hidden" name="user" value="<?php echo $user; ?>"/>
<input type="submit" value="Open URL" />
</form>

Change these lines:
<?php
$page=$POST_['page'];
$user=$POST_['user'];
<?
....
var user=<?php echo "$user";?>;
var page=<?php echo "$page";?>;
open('www.test.com/test.php?page='+page'&user='+user,'_self');
to this:
<?php
$page=$_POST['page']; //incorrect $_POST declaration
$user=$_POST['user']; //incorrect $_POST declaration
?> //php tag incorrectly closed
....
var user=<?php echo $user;?>; //echoing a variable not string (no need for quotes)
var page=<?php echo $page;?>; // echoing a variable not string (no need for quotes)
open('www.test.com/test.php?page='+page+'&user='+user,'_self'); // link was broken, forget to put '+' after page variable in link.

You can create a form and via Javascript just run YOURFORMNAME.submit();
Use href in javaScript to move to another location:
location.href="www.test.com/test.php?page='+page'&user='+user"

How to submit one form out of multiple with javascript

On my website I have a big list of all the letters people can view.
For every letter there is a form which sends some data from the letter to the next page. What I want to do is to submit the form with a link, and not with a button.
As far as I know, that is not possible with PHP. So i tried making what i want in Javascript.
My programming experience in Javascript is litterly 0%. I need some help with this :)
This is the code I'm using:
<script type="text/javascript">
function submitform()
{
document.forms["brief_weergeven"].submit();
}
</script>
<form id='brief_weergeven[]' action='<?php echo $main; ?>beveiligd/achterbanner/nieuwsbrief.php' method='POST'>
<input type='hidden' name='nummer' value='<?php echo $brieven[0]; ?>'>
<input type='hidden' name='datum_maand' value='<?php echo $maand_getal; ?>'>
<input type='hidden' name='datum_jaar' value='<?php echo $jaar; ?>'>
<a href="javascript: submitform()" class='button'>Nieuwsbrief <?php echo $brieven[0]; ?> (<?php echo $maand .' ' .$jaar; ?>)<BR></a>
</form>
This code runs for every letter. As you can see, I'm using a array to give all the forms a seperate ID. The only thing is that i have no idea how to let javascript know which forum i submitted.
How can I do this? Please remember that i know nothing about javascript, so please explain what you're doing in your answer.

You dont need javascript to do this, just use css to make your button look like a link:
Css:
button {
border:none;
padding:0;
background: none;
color: blue;
text-decoration: underline;
cursor: pointer;
}
html:
<button type="submit">Submit</button>

You can usedocument.getElementById('form-id')
And event handler like this
var form = document.getElementById('your-form-id');
form.onsubmit = function(){
// code
}

user574632 gave you a nice alternative. Still even want to use JavaScript you can try below.
Use the jQuery onclick method having the id attribute of the link as selector.
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$("#submit_link").on("click", function(){
var form = $(this);
var url = form.attr("action");
var data = form.serialize();
$.post(url, data);
});
});
</script>
<form id='brief_weergeven[]' action='<?php echo $main; ?>beveiligd/achterbanner/nieuwsbrief.php' method='POST'>
<input type='hidden' name='nummer' value='<?php echo $brieven[0]; ?>'>
<input type='hidden' name='datum_maand' value='<?php echo $maand_getal; ?>'>
<input type='hidden' name='datum_jaar' value='<?php echo $jaar; ?>'>
<a href="#" id="submit_link" class='button'>Nieuwsbrief <?php echo $brieven[0]; ?> (<?php echo $maand .' ' .$jaar; ?>)<BR></a>
</form>