-
Notifications
You must be signed in to change notification settings - Fork 0
/
howtoprettyurl
60 lines (46 loc) · 1.79 KB
/
howtoprettyurl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
howtoprettyurl
This is usually done by routing all requests to a single entry point (a file that executes different code based on the request) with a rule like:
# Redirect everything that doesn't match a directory or file to index.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .* index.php [L]
This file then compares the request ($_SERVER["REQUEST_URI"]) against a list of routes - a mapping of a pattern matching the request to a controller action (in MVC applications) or another path of execution. Frameworks often include a route that can infer the controller and action from the request itself, as a backup route.
A small, simplified example:
<?php
// Define a couple of simple actions
class Home {
public function GET() { return 'Homepage'; }
}
class About {
public function GET() { return 'About page'; }
}
// Mapping of request pattern (URL) to action classes (above)
$routes = array(
'/' => 'Home',
'/about' => 'About'
);
// Match the request to a route (find the first matching URL in routes)
$request = '/' . trim($_SERVER['REQUEST_URI'], '/');
$route = null;
foreach ($routes as $pattern => $class) {
if ($pattern == $request) {
$route = $class;
break;
}
}
// If no route matched, or class for route not found (404)
if (is_null($route) || !class_exists($route)) {
header('HTTP/1.1 404 Not Found');
echo 'Page not found';
exit(1);
}
// If method not found in action class, send a 405 (e.g. Home::POST())
if (!method_exists($route, $_SERVER["REQUEST_METHOD"])) {
header('HTTP/1.1 405 Method not allowed');
echo 'Method not allowed';
exit(1);
}
// Otherwise, return the result of the action
$action = new $route;
$result = call_user_func(array($action, $_SERVER["REQUEST_METHOD"]));
echo $result;