routing in php

README.md

Running the server

Modify index.php to create new routes and handlers for them keeping the basic skeleton intact. Save all files to one folder. Run the php server from the command line using:

php -S 127.0.0.1:8000

index.php

<?php

include_once "Request.php";
include_once "Router.php";

$router = new Router(new Request);

$router->get("/", function(){
    return "Hola MadaFuqqa!!";
});

$router->post("/", function($request){
    return json_encode($request->getBody());
});

IRequest.php

<?php

interface IRequest{
    public function getBody();
}

Request.php

<?php
include_once "IRequest.php";

class Request implements IRequest{
    function __construct(){
        $this->bootstrapSelf();
    }

    private function bootstrapSelf(){
        foreach($_SERVER as $key => $value){
            $this->{$this->toCamelCase($key)} = $value;
        }
    }

    public function getBody(){
        if($this->requestMethod === 'GET') return;
        elseif($this->requestMethod === 'POST'){
            $body = array();
            foreach($_POST as $key => $value){
                $body[$key] = $value;
            }
            return $body;
        }
    }

    private function toCamelCase($string)
    {
        $result = strtolower($string);
            
        preg_match_all('/_[a-z]/', $result, $matches);

        foreach($matches[0] as $match){
            $c = str_replace('_', '', strtoupper($match));
            $result = str_replace($match, $c, $result);
        }

        return $result;
    }
}

Router.php

<?php

class Router{
    private $request;
    private $supportedHttpMethods = array(
        "GET",
        "POST"
    );

    function __construct(IRequest $request){
        $this->request = $request;
    }

    function __call($name, $args){
        list($route, $method) = $args;
        if(!in_array(strtoupper($name), $this->supportedHttpMethods)){
            $this->invalidMethodHandler();
        }
        $this->{strtolower($name)}[$this->formatRoute($route)] = $method;
    }

    private function formatRoute($route)
    {
        $result = rtrim($route, '/');
        if ($result === '')return '/';
        return $result;
    }

    private function invalidMethodHandler(){
        header("{$this->request->serverProtocol} 405 Method not Allowed");
    }

    private function defaultRequestHandler(){
        header("{$this->request->serverProtocol} 404 Not Found");
    }

    function resolve()
    {
        $methodDictionary = $this->{strtolower($this->request->requestMethod)};
        $formatedRoute = $this->formatRoute($this->request->requestUri);
        $method = $methodDictionary[$formatedRoute];

        if(is_null($method))
        {
            $this->defaultRequestHandler();
            return;
        }

        echo call_user_func_array($method, array($this->request));
    }

    function __destruct()
    {
        $this->resolve();
    }
}