send each request to appropriate controller

I want to make a small web application, and I'm not sure how to go about this. What I want to do is send every request to the right controller. Kind of how CodeIgniter does it.

So if user asks for domain.com/video/details I want my bootstrap (index?) file to send him to the "Video" controller class and call the "details" method in that class.

If the user asks for domain.com/profile/edit I want to send him to the "Profile" controller class and call the "edit" method in that class.

Can someone explain how I should do this? I have some experience using MVC frameworks, but have never "writte开发者_如何学Cn" something with MVC myself.

Thanks!

Edit: I understand now how the url points to the right Controller, but I don't see where the object instance of the Controller is made, to call the right method?

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You need to re-route your requests. Using apache, this can be done using mod_rewrite.

For example, add a .htaccess file to your public base directory and add the following:

RewriteEngine on

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ index.php?rt=$1 [L,QSA]

This will redirect users trying to access

/profile/edit

to

index.php?rt=profile/edit

In index.php, you can access the $_GET['rt'] to determine which controller and action has been requested.

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1. Use mod-rewrite (.htaccess) to rewrite the url from www.example.com/taco to www.example.com/index.php?taco/
2. in index.php, grab the first URL parameter key, use that to route to the correct url. As it will look like "taco/"
3. You may want to add / to the front and back if it doesn't exist. As this will normalize the urls and make life easier
4. If you want to preserve the ability to have traditional query strings. Inspect the URL directly and take the query string portion. break that on ?, which will leave you with the routing info in key 0 and the rest in key 1. split that on &, then split each of those on = and set the first to the key and the second to the value of an array. Replace $_GET with that array.

Example:

$path = explode("?", $_SERVER["QUERY_STRING"],2);
$url = $path[0];
if(substr($url,0,1) != "/")
{
    $url = "/".$url;
}
if(substr($url,-1,1) != "/")
{
    $url = $url."/";
}
unset($_GET);
foreach(explode("&", $path[1]) as $pair)
{
    $get = explode("=", $pair, 2);
    $_GET[$get[0]] = $get[1];
}

// Define the Query String Path
define("QS_PATH", $url);

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Depending on what you want to do or how much work you want to do, another option versus writing your own MVC is to use Zend Framework. It does exactly what you're asking for and more. You still need to configure URL rewriting as mentioned in the other answers, but it quick and easy.

Even if you're not interested in Zend Framework, the following link can help you configure your rewrite rules: http://framework.zend.com/wiki/display/ZFDEV/Configuring%2BYour%2BURL%2BRewriter