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Using a form to save/update settings in a db and build a HTML with those settings from a template

My limited experience in web development as a self-taught led me to hit a wall while trying to figure out how to deal with this problem.
I need a form (map_settings.php) where the user should enter some inputs. Those inputs must be saved in a database table (MAPS) and then used to create the final HTML file (e.g. map1.html) for that specific user/inputs.
I know how to deal with using forms and saving submitted data to a database.
What is completely obscure to me is how can I use those inputs to automatically generate the final HTML.
My idea is to have a template HTML (template.html) and each time a user saves new settings via the form, I copy the template and replace some variables inside it with the actual data the user has input in the form.
If this might matter, the variables I need to replace in the template are also JavaScript variables within a <script> tag.
Can anybody help me suggesting one viable way to do this? I am mostly using JavaScript and PHP, without frameworks. I've also red about JavaScript templating engines, but I sincerely did not get if those are useful to me in my case.
Anyway, here is an illustration of what I would need to do, to hopefully clarify better my point.

Creating a static HTML file per user is not the way to go. Instead just have a PHP script like mapdisplay.php or similar.
Make the script so that if you type mapdisplay.php?map=1 in the browser then it will read the map ID, get the relevant settings from the database for the map in question and then generate some HTML to display them - of course you can have most of the HTML ready made like a template, and just use PHP to fill in the details from the database. This idea of getting data on the fly when requested, and plugging it into some HTML is how most web applications work.
If you create a static HTML for each user it quickly becomes unmanageable with a large number of users, plus it's hard to introduce changes or improvements to the template because instead of just updating one script file, you have to back and re-do every existing page. There are other disadvantages to your approach too, but I won't continue here - you get the idea I hope.

If I were you I'll make that in this way:
Don't use template.html
Don't get data from database to new file, but from form
Make database test before make file
To make template use
$template_text = "text...text...html...text...".$php_varible."text...text...html...text";
For other things about php see w3schools

Converting Excel Data to a Chart in HTML dynamically

Is it possible to be able to upload an excel document with varying ranges of data, and have that data dynamically displayed in a basic form of chart(bar, pie, etc.) on our company website.
After doing some research I figured the only two possible ways to maybe do something like this is to use a very complicated macro in VBA or a Javascript parser to read the data and display it then. The data that will eventually go in here will have sensitive information so I cannot use google charts or anything like that.

This problem has to be divided into two parts.
One -part is to gather and process the information needed to display the chart.
Second - This is the easiest, a way to display a chart in HTML. For this, you can use www.c3js.org javascript library to display the chart in HTML.
Regarding part one, it depends in which technology is built your website.
For example, If it is in php, you will need to find a library in php, which can read and parse excel files.
Then you have to create a service in your website, where the data is going to be provided. For example,
www.yourcompany.com/provideChartData.php
You can format the response as json format.
Once you have solved that, you only have to call the service from your page, and the data will be dynamically displayed. You can call it using jquery library for javascript ($.post("www.yourcompany.com/provideChartData.php",function (data) { code to display chart ....}))

There is no real easy way to do this that I have found. I have had to manually parse these things in the past but there are some libraries out there for node that might help you.
https://www.npmjs.com/package/node-xlsx
You can also export form excel as CSV. When you do this, me sure to set the custom separator to something other than ',' and you should be fine to import it into a large array and get the data/charts you need.
https://github.com/wdavidw/node-csv
Hope that helps.

Combine PHP file and page - Wordpress

I am just wrapping up a long term project I have done for a company, but I am really stuck at this point.
I have a cool little page here: http://hagen-etc.com/test/buy/
It is basically showing all their retailers in the right hand side div while you can narrow down the results with the different options on the left side (Javascript based).
Everything works just fine, but I have run into a problem. The thing is, the person I am developing the site for has absolutely zero knowledge about programming and website managment etc, and therefore I need a smart way for her to change it.
I have simplified the procedures several other places on the website using shortcodes with Visual Composer and Shortcoder-plugin.
The problem here is, The Javascript is in footer.php while the actual content is on a Page in the dashboard. How do I make a smart solution so she can easily manage this in a blink of an eye? You can take a look at the source code in the link above if you would like to.
Would love to get some help on this because I am having a hard time figuring out a solution. Maybe a plugin can even do this?
The different areas, countries, cities and retailers are written in HTML in the Page while reas, countries, cities and retailers are written in Javascript in the footer.php. I know I can move the Javascript over to the Page, but the problem is, she would still have to change both the Javascript and the HTML.
I would like it to work with Shortcodes in a structure like this:
[countryopen]
[areaopen]
[cityopen]
[retailer][retailer]
[cityclose]
[areaclose]
[countryclose]
How would I go about this? The HTML would be in the top of the file while the Javascript would be in the bottom. I cannot really change both things with just one shortcode. How would I do this or is there even a better solution?

So essentially you are trying to allow this person to manage locations? You can use Advanced Custom Fields for WordPress and/or custom posts types for WordPress.
I would use a combination. Create a new custom post type in your functions.php and then, after installing the ACF plugin, create Location, Area, City, and Retailer fields and assign them to the new post type.
Similarly, in the index "Page" that you are working in now, you can create a query to dump any of these Locations onto the page.
I hope this helps. Let me know if I missed the point here, the question is still a little unclear.
UPDATE: There are many great tutorials that will walk you through creating a custom post type in your WordPress theme. WPBeginner and Smashing Magazine do a really good job of bringing you through this step-by-step. It will be very helpful for you to know how to do this and to understand this as a basic part of WordPress's Model-View-Controller system, here you are creating new views for your users to interact with.
After creating your new custom post type, which will seem like any other post/page in the Edit view, you can use the ACF plugin to easily add new fields to this new custom post type:
In the second section called "Location" you can define what type of posts these fields should be appended to. You would make these inputs says:
Post Type is equal to [Your New Post Type]
Your new post type being "Locations" or "Retailers" or however you want to phrase that. Now, when you check out the Edit view of a new custom post type, you can see these new fields appended to the bottom. Lastly, you may want to remove any field that you wouldn't want your web manager adding information into like WordPress' native Description or Excerpt inputs. You can do this by adding a few lines to your functions.php after you have created the post type:
add_action('init', 'remove_editor_from_retailer');
function remove_editor_from_retailer() {
remove_post_type_support( 'retailer', 'editor' );
}
Granted that "Retailer" is the name of your custom post type.

You can't have a user updating data in a javascript file.
So what you need to do is split the data off from the functionality.
To do this, put a script tag in one of your Wordpress template files, and output the area, country etc. data there as a Javascript variable.
You can manage and fetch this data using any Wordpress method of your choice. Anything that allows the user to update data in the admin area which you can then output in your plugin will work. So a plugin, a shortcode on some specific post, etc. are possibilities.
Then, in your existing Javascript file, remove your hardcoded data and instead pull it from that variable.

Merging PDF with Data batch

I'm a new french stackoverflow user, so sorry for my misspelling.
I would like to know how to automatically merge writable/alterable PDF with data file(XML, TXT or FDF).
I have seen that Adobe Acrobat Pro could import Data, but in the wizard action, I've not found "import" choice to make it automatic. The wizard offers JavaScript add but i don't find any PDF manipulation line code JS.
Does JavaScript is the solution for my issue ?
Or do you have some alternative ?
Thx for reading.

You can use the COM of Acrobat or PDFCreator to do it. There is a lot of example here (And in French):
http://www.developpez.net/forums/d431662/logiciels/microsoft-office/excel/contribuez/excel-word-pdf-adobe-acrobat-pro-pdfcreator/

With "Wizard", you are using the Actions Wizard?
If so, this is understandable. However, there is the Acrobat JavaScript function which would import an FDF (or a few other data formats); have a closer look at the importAnFDF() method in the Acrobat JavaScript documentation (which is part of the Acrobat SDK, downloadable from the Adobe website).
There are other approaches, by importing a tab-delimited file as File Attachment (aka Data Object), and then interpret this file to create your data table, and then use Acrobat JavaScript to fill out the form, save or print it, and so on.
A third method would be using Template pages in the PDF, craft your FDF so that it supports Templates, import it into the base document and then wait until it has spawned all the pages. You then have one big document containing all the filled forms.
Finally, if you have a higher volume, you will be better off using a server-side fill-in tool, such as FDFMerge by Appligent.

Learn how to make Flair for my users (javascript snippets)

I wanted to give my users a little piece of JavaScript or HTML code that they could put on their site and show information about them. Kind of like StackOverFlows new feature Flair.
I have an idea of how to code it. I was going to give them some JS with a HTML that had a DIV id="MySite_Info". Then the JS would go to my site and pull some JSON or XML and then fill in the data with a DIV in the HTML I gave them on their site.
Is there a better way to do this? Or any examples online I should follow? Whats the best way to create these javascript snippets? (Not sure what the proper name is)

There are two basic options.
Images (and pictures of text suck)
JavaScript - as you described
The approach I would take would be to:
Dynamically generate the JS using a server side process. This would include data for the user (using a JSON generator to easily produce the data in a suitable format).
Build the badge using standard DOM methods
Find the element with the document id and appendChild the generated badge