Redirect script.js to script.php - apache

Question

I have some javascript that is generated by PHP. Currently I am including the javeascript in the html using
<script type="text/javascript" src="js/script.php">
But I want to use
<script type="text/javascript" src="js/script.js">
Now script.js does not exist, but I want it to redirect to script.php without the user knowing.
Can this be done with .htaccess?

Answer 1

If your web server supports mod_rewrite, you could do something like this:
RewriteEngine On
RewriteRule ^js/script\.js$ js/script.php
If you have more than one script, you could generalize that RewriteRule by using a backreference from the test pattern:
RewriteRule ^js/(.*)\.js$ js/$1.php

Answer 2

In the parent directory you could have a .htaccess which maps all asset files to the relevant php file.
RewriteEngine on
RewriteRule ^js/(.*)\.js$ js/$1.js.php
RewriteRule ^css/(.*)\.css$ css/$1.css.php
notice I have kept the file extension for better readability.
Files
htdocs
mysite
assets
.htaccess
js->
script.js.php ( http://locahost/mysite/assets/js/script.js )
css->
style.css.php ( http://locahost/mysite/assets/css/style.js )
Headers
By default the files will be outputted as php, you will have to change the content type header to the correct type(js,css,txt,xml, etc).
You might also want to disable the files from being cached as they most probably change frequently.
You can either do this in all the php files or in the .htaccess file.
PHP
content type
js/*.js.php -> header("Content-type: text/javascript");
css/*.css.php ->header("Content-type: text/css");
cache
*.php -> header('Cache-Control: no-cache, no-store, must-revalidate'); // HTTP 1.1.
*.php -> header('Pragma: no-cache'); // HTTP 1.0.
*.php -> header('Expires: 0'); // Proxies.
.htaccess
content type
<FilesMatch \.js.php$>
Header set Cache-Control "no-transform"
Header set Content-Type "application/javascript; charset=utf-8"
</FilesMatch>
<FilesMatch \.css.php$>
Header set Cache-Control "no-transform"
Header set Content-Type "text/css; charset=utf-8"
</FilesMatch>
cache
<IfModule mod_headers.c>
Header set Cache-Control "no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header set Expires 0
</IfModule>

Answer 3

If you just want your script src to end in ".js" you could always leave it as a .php file and link it in like this:
<script type="text/javascript" src="js/script.php?name=script.js">
This technique is commonly used with php or other scripts which generate images:
<img src="images/thumbnailer.php?x=foo.jpg">
This way if the browser tries to determine the type of file by the "extension," it will be "tricked" into using the right format.