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pass variable between two .html pages

I basically have a search box, I am trying to get the value inserted and use on a separate /results.htm screen via the submit button. I've been able to get and process the results within the same page; but I am trying to do this after redirecting to a new page
/search.html
<script>
jQuery(document).ready(function() {
jQuery("#submit").click(function() {
var ZipSearch = jQuery("#Zipcode").val();
});
});
</script>
<div class="search_bar">
<form action=""><input type="text" name="Zipcode" id="Zipcode" value="" maxlength="5" placeholder="Zipcode">
<input type="button" name="submit" id="submit" value="Submit"/></form>
</div>
Want to keep input value content from /search.htm within a variable on next page, separate, /results.htm
How can I keep the user input value and use on my separate 'results' page?

Remove all the JavaScript from search.htm. There's no point in writing custom software to do things HTML has built-in.
Set the action of the form to the URL of the second page (action="/results.htm").
Change the button to a submit button (type="submit")
Read the data from the query string (location.search in JavaScript or $_GET in PHP).

PHP redirect with header

I'm not expert in PHP, and I'm trying to create public chatroom for my simple website.
I'm using SQL database to store messages.The file named chat_index.php getting all messages from database and show it to users. Also it has a simple form to send message with PHP GET method. The following is code for my form.
<form method="get" action="sendmessage.php">
<input name="msg" placeholder="Message" data-theme="a" type="text">
<button type="submit" class="ui-btn ui-corner-all">Send</button>
</form>
With above code I'm sending data to sendmessage.php file. In this file adding message to database and user redirect to chat_index.php with this code.
header("Location: chat_index.php");
exit();
After redirect page loading correctly on browser window. But URL end like this
...../sendmessage.php?msg=test_message
So if I reload the page message sending again and url getting correct like this
...../chat_index.php
How can I resolve this problem?
UPDATED
I tried with POST method. but not solved. browser showing content in chat_index.php and url ending with ../sendmessage.php

Why you are recieveing the url variables is because you are using GET. use POST instead and the variables will be gone.
example:
<form method="POST" action="sendmessage.php">

If you don't want to send data to the query string use POST instead of GET.
<form method="POST" action="sendmessage.php">

This should clearly be a POST form. Any form saving or changing anything on the server should be. Otherwise (using get) people could add messages by just following a link, which is not intended. The redirect after save is OK and good practice. Note that such redirects only work before any output is produced.
Cannot say much more by what you have posted. You should also check if your saving and redirect code is triggered correctly when message is posted.

This is what is happening, the form is being submitted from chat_index.php, so the action ends up being chat_index.php/sendmessage.php.
To solve this change the method to post as directed and change your action to /sendmessage.php
your form should look look like this
<form method="POST" action="/sendmessage.php">
....
</form
hope this help

If this is to be a simple forum site, then it would be much less complicated to not redirect at all. Just set your action attribute to "", and when someone submits the form, it will post the data back to the page. So do something like this:
<form method="post" action="">
<input name="msg" placeholder="Message" data-theme="a" type="text">
<input name="function" type="hidden" value="post_message">
<button type="submit" class="ui-btn ui-corner-all">Send</button>
</form>
Then put the php code that was in sendmessage.php into chat_index.php above the starting DOCTYPE and html tags, and delete sendmessage.php. Or alternatively, use include('sendmessage.php') in the same spot. Then when the page loads, check if $_POST['function'] == 'post_message', and if this condition is true, then execute the stuff you had in sendmessage.php. That will be much more compact, and the user will be redirected once instead of twice. Also, I don't know your file structure, but you might want to rename chat_index.php to just index.php to make it intuitive and so that people can't see inside your directory.

Which is the secured way of scripting registration form?

In many sites, I have seen after clicking on "Sign Up" or "Register" button we are either re-directed to other page where the insertion of our data in database takes place. Like in Facebook, when you click "Sign Up" it goes to the facebook.com/r.php page. I want to create a registration form which when submitted, will be not re-directed but will validate and insert data in database in the same page.
For example, Facebook uses a form such as:
<form id="xyZ" name="abc" method="post" action="r.php">
It redirects us from index.php to r.php.
But I want to use:
<form id="xyZ" name="abc" method="post" action="index.php">
i.e Without redirecting.
Which one is safe?

Redirecting does not effect the security of the website at all in the slightest. I recommend taking a look here about possible authentication solutions you can use for your site.
Whether you authenticate and log them in/register them using index.php or r.php, it doesn't matter in the slightest. Forum systems such as phpbb used to at one time to everything in the index.php file, and depending on the ?page $_GET variable, it would display different things (Like a login form, or a registration form). How you handle it, is entirely up to you, but neither method is more insecure than the others.

Both are safe!
Redirect method, kind of link using which user redirects to another page where they can register
Ajax Method, here you can make calls using Javascript / jQuery which returns you html source, which you can just plug in appropriate place.
Your Page where you need your registration form to be displayed, when user click on sign up link
<div id="ajax-response"></div>
<a id="signup" href="signup.php">SignUp</a>
<script type="text/javascript">
jQuery("#signup").on('click', function(e){
e.preventDefault();
var _context = this;
jQuery.ajax({
url: jQuery(_context).attr('href'),
success: function(response){
jQuery("#ajax-response").html(response);
}
})
})
</script>
and signup.php, will contain the registration form
<form>
<input type="text" name="fname">
<input type="text" name="lname">
<input type="text" name="email">
<input type="submit" />
</form>

How do you generate web pages based on a form?

For example, the website https://talky.io/ has a form on its homepage. When you enter text into the form and hit the button, you're taken to a page that's https://talky.io/[your text]. How do you do this? What's the best way to do it?
Thank you!

You can use onSubmit and change the action attribute of the form via javascript, then return true. The code could look like this:
HTML from linked page:
<form id="createRoom">
<input id="sessionInput" placeholder="Name the conversation" autofocus="autofocus">
<button type="submit">Let’s go!</button>
</form>
Js code:
document.getElementById("crateRoom").onsubmit = function(){
var url = encodeURIComponent(document.getElementById("sessionInput").value);
document.getElementById("crateRoom").action = "/" + url;
return true;
}

It is server-side script job. You can look at some MVC framework and the url parameters

You can use GET method of form;for example:
<form action="index.php" method="get">
Page: <input type="text" name="page">
<input type="submit" value="Submit">
</form>
that after submit will go to index.php?page=yourEnteredPage.

You can use PHP symfony or codeignitor, if you use .net then create a new MVC project.
But if you only need to change urls like
www.mysite.com/mypage.php?something=value
to
www.mysite.com/value
You can do a mod rewrite in apache or if you're using .net then use RegisterRoutes in your global.asax.cs

Using a form you can submit data to a location/url that was given in the action attribute of the for, for example
<form method="POST" action="http://example.com">
<input name="first_name" type="text" value="" />
<!-- Form elements -->
<input type="submit" name="mySubmitButton" value="Submit">
</form>
This form will submit the form data to the given action url when submit will be pressed and on the derver data could be retrieve using
$first_name = $_POST['first_name';];
and so on. The method POST is used to submit the form in the post array so you can retrieve data using $_POST['formfieldname'] and if you use method="GET" then you can get submitted data from $_GET variable, like, $fname=$_GET['first_name']. GET has limitation of amount when submitting data (safe to use up to 2000 characters IE's limit) and is visible to address bar of the browser and not being used for login (password) and POST can send more data than GET and also not visible to address bar.
You may read this.

Fairly possible with URL Rewriting
http://en.wikipedia.org/wiki/Rewrite_engine

Make form redirect users after posting

I need to change a form so that instead of reloading the page after submitting it, it redirects the user to another page.
This is the form I'm talking about:
<form class="questionform" name="questionform-0" id="questionform-0">
<textarea class="question-box" cols="12" rows="5" id="question-box-' . $questionformid . '" name="title" type="text" maxlength="200" size="28"></textarea>
<input type="text" class="ubicacion" value="" name="question">
<input type="button" name="ask" value="Publicar" onclick="askquestion('questionform-0'); window.location.reload(true);">
I want to remove window.location.reload and change it for something that redirects users to the page their comment will appear.
The problem is that it's not simply a static. So I have no idea how to do it. The URL I want to send users to is:
www.chusmix.com/s?=(content of the second field)
How do I do it? Anyway thanks for any info or whatever that points me on the right direction. Thanks

There is no need to use javascript for this purpose. You only need to set the action attribute of the form tag. It tells where the form information will be sent. So in your case it will be:
<form action="http://www.chusmix.com/s">
Also if you want to send the variables through the URL like: http://www.chusmix.com/s?variable=someValue
You need to set the method attribute as get so it will look like this:
<form action="http://www.chusmix.com/s" method="get">
If you don't want the data sent to be visible set the method to post, note that there are different advantages for each method so i recommend you read more about this if this form is an vital part of your webpage.
The variable names that appear in the url http://domain.com?**variable**= will depend on the inputs name <input type="text" name="**variable**" />
For more information on how forms work you can go to:
http://www.w3schools.com/TAGS/tag_form.asp
http://www.tizag.com/phpT/forms.php

You can ad an action:
<form action="redirection_url.php" method="POST" class="questionform" name="questionform-0" id="questionform-0">
I think you can use both absolute and relative url. Also note that I've added
method="POST" - which defines how the data from the form will be sent, as you already send some data with GET method (that's the stuff after ? in your url) - so this should work pretty well.

If you cannot use the action attribute in the <form> tag, you may redirect the user using window.location (you will probably want to do this inside the askquestion method, not in the onclick attribute).
window.location = "http://www.chusmix.com/s?=" + inputValue;