JS to detect if wrong page is loaded and redirect

[kapow]

I have a php page that includes an html page. I don't want the htm page to load on its own. Can someone tell me a javascript to do something like this:

If the url in the address bar is page.htm
{ redirect to page.php }

I don't think a simple redirect would work because the php page includes the html page, so it would include the redirect to itself.

[korkus2000]

This is like frame breaking scripts. You need to use the window.location property:

if(window.location!= "page.htm"){
window.location = "page.php"
}

Now you will need a full address since it will read the entire URL.

[kapow]

Now you will need a full address since it will read the entire URL.

You mean like this?:

if(window.location!= "http://www.mysite.com/page.htm"){
window.location = "http://www.mysite.com/page.php"
}

Will I get a problem iF sometimes there is or is not: http:// OR www

[kapow]

Just tried this and I get an infinate loop:

if(window.location!= "page.htm"){
window.location = "page.php"
}

So I tried this
if(window.location!= "www.mysite.com/page.htm"){
window.location = "www.mysite.com/page.php"
}

and I get this wrong url:

[mysite.com...]

[kapow]

This seems to work :)

if (parent.name = page.htm){
window.location = "page.php" }

I don't relly know JS so can anyone let me know if the above will create bad problems for any typical browsers?

[Bernard Marx]

if (parent.name = page.htm){
window.location = "page.php" }

That works?!

1. page.htm isn't quoted, so it will be considered a ref to the htm property of a nonexistent object, page.

2. There is only a single = operator in the if( ). That's not a comparison, it's an assignment. It will always eveluate to true, that's if it's assigned to anything sensible!

3. The window name is totally separate from it's location. Usually windows only have names if they are explicitly given them. eg

open("mypage.htm","pop1", "_features_")

pop1 will be the name of the new window.

If you are testing: window.name!= "page.htm", then it will almost certainly always be true.

Oh yes. really, you should be using either:
a) window.location.href = "page.php"
b) window.location.replace("page.php")

The second one means that the new page replaces the old one in the history, so it's no longer reachable via the back button.

[kapow]

Well that scares me. Sounds like I'm doing the wrong thing (like I said, I don't know much about javascript).

Can you show me the complete working script?

[py9jmas]

You could move page.htm outside of the doument root.
Or use .htaccess to deny access to page.htm.
(Assuming PHP is accessing page.htm as a local file, not over HTTP).

[Bernard Marx]

I have only tested this on strings, not on live pages.
Should be OK.

/* redirectToPHP: 
 * Redirects page if extension is not ".php"
 *        
 * use:
 * a) Specify redirect URL (relative¦¦absolute):
 *    redirectToPHP("apage.php")
 * b) If no URL is specified
 *  the page will be redirected to the same
 * address, but with the extension swapped to ".php":
 *    redirectToPHP()
 */
 
function redirectToPHP(URL)
{
  var loc = location.href;
  var iLastDot = loc.lastIndexOf(".");
  var ext = loc.substr(iLastDot);
  if(ext == ".php") return;
  
  URL = URL ¦¦ loc.substr(0,iLastDot) + ".php";  
  location.replace(URL);
}
// nb: change ¦¦ to unbroken pipes.