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<?php
class Router {
private static $routes = [];
private static $pathNotFound = null;
private static $methodNotAllowed = null;
public static function add($method, $expression, $function){
array_push(self::$routes, [
'expression' => $expression,
'function' => $function,
'method' => $method
]);
}
public static function pathNotFound($function){
self::$pathNotFound = $function;
}
public static function methodNotAllowed($function){
self::$methodNotAllowed = $function;
}
public static function run($basepath = '/'){
// Parse current url
$parsed_url = parse_url($_SERVER['REQUEST_URI']);//Parse Uri
if(isset($parsed_url['path'])){
$path = $parsed_url['path'];
}else{
$path = '/';
}
// Get current request method
$method = $_SERVER['REQUEST_METHOD'];
$path_match_found = false;
$route_match_found = false;
foreach(self::$routes as $route){
// If the method matches check the path
// Add basepath to matching string
if($basepath!=''&&$basepath!='/'){
$route['expression'] = '('.$basepath.')'.$route['expression'];
}
// Add 'find string start' automatically
$route['expression'] = '^'.$route['expression'];
// Add 'find string end' automatically
$route['expression'] = $route['expression'].'$';
// echo $route['expression'].'<br/>';
// Check path match
if(preg_match('#'.$route['expression'].'#',$path,$matches)){
$path_match_found = true;
// Check method match
if(strtolower($method) == strtolower($route['method'])){
array_shift($matches);// Always remove first element. This contains the whole string
if($basepath!=''&&$basepath!='/'){
array_shift($matches);// Remove basepath
}
call_user_func_array($route['function'], $matches);
$route_match_found = true;
// Do not check other routes
break;
}
}
}
// No matching route was found
if(!$route_match_found){
// But a matching path exists
if($path_match_found){
header("HTTP/1.0 405 Method Not Allowed");
if(self::$methodNotAllowed){
call_user_func_array(self::$methodNotAllowed, Array($path,$method));
}
}else{
header("HTTP/1.0 404 Not Found");
if(self::$pathNotFound){
call_user_func_array(self::$pathNotFound, Array($path));
}
}
}
}
}