As I'm a novice user I don't know where exactly to add this code:
header("Location: htmlcode.html");
do you mean as a command in the end of each php file?
The current location of all files is in http://localhost/ .

Even if it is so, I'm afraid this would make a refresh to htmlcode.html.
I actually don't want to make any refresh(es) to htmlcode.html as there is a GoogleMap showing some information dynamically created and after any unwanted (not scheduled) refresh some needed information created via JavaScript functions will be deleted. After any refresh those info will start being created again from the beginnig.

I've tried with success to stop the php execution via an event handler:
<INPUT type="submit" value="Submit1" name="Submit1" onMouseOut="if (navigator.appName=='Microsoft Internet Explorer') document.execCommand('Stop'); else window.stop();">
In this case the php execution continues on the background, creates the desired results and does not “disturb” the web browser.
The problem in this case is that if the user does not move the pointer out of the submit button the javascript code does not execute. Another case where the event handler won't work is when the user does not click on the Submit button but just presses the enter key while the specific form is "active" in the web browser.
I tried the event handler onMouseUp but didn't work (possibly because the action of the form starts when Mouse click is up.).
Finally, the form is the following:
<FORM method="post" action="http://localhost/phpfile1.php?param1=5&param2=1">.

Any suggestions please?