Question

How can I add something in JavaScript that will check the website URL of someone on a web site and then redirect to a certain page on the website, if a match is found? for example…

the string we want to check for, will be mydirectory, so if someone went to mysite.com/mydirectory/anyfile.php or even mysite.com/mydirectory/index.php JavaScript would then redirect their page / url to mysite.com/index.php because it has mydirectory in the URL, how can I do that using JavaScript?

Answer 1

If I have understood the question correctly, then it is fairly simple and can be achieved using document.URL

var search = 'mydirectory'; // The string to search for in the URL.
var redirect = 'http://mysite.com/index.php' // Where we will direct users if it's found
if(document.URL.substr(search) !== -1) { // If the location of 
    // the current URL string is any other than -1 (doesn't exist)
    document.location = redirect // Redirect the user to the redirect URL.
}

Using document.URL you can check anything in the URL, however you might want to look into using something like Apache’s mod_rewrite for redirecting the user before they even load the page.