ルーティング

.htaccess

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L]

index.php

 <?php
    $router = new bz0\Router();
    
    $router->get("/router/test/:id", function(){
        echo "test<br>";
    });
    
    $router->get("/router/test2/", function(){
        echo "test2<br>";
    });

router.php

<?php
    namespace bz0;
    
    class Router{
        //メソッド
        public $method;
        //ディレクトリパス
        public $path;
        //パス内の引数
        public $args;
        //URLパラメータ
        public $params;
        
        public function __construct(){
            $this->method = $_SERVER['REQUEST_METHOD'];
            $this->path   = $_SERVER['REQUEST_URI'];
        }
        
        private function method($method){
            return $this->method === strtoupper($method);
        }
        
        private function pathMatch($realPath, $path){
            $realPathList = explode("/", $realPath);
            $pathList = explode("/", $path);
            
            echo $realPath . "<br>";
            
            //階層数が同じ
            if ($this->dirCountMatch($realPathList, $pathList)){
                foreach($pathList as $i => $dirName){
                    if (preg_match("/^:(.*)/", $dirName, $match)){
                        //ディレクトリ名の取得
                        $this->args[$match[1]] = $realPathList[$i];
                    }else{
                        if (!$this->dirNameCheck($realPathList[$i], $dirName)){
                            return false;
                        }
                    }
                }    
            }else{
                return false;
            }
            
            return true;
        }
        
        private function params(){
            switch ($this->method) {
                case 'GET':
                    $params = strstr($this->path, '?');
                    parse_str($params, $this->params);
                    break;
                case 'POST':
                    foreach (array_keys($_POST) as $key) {
                        $this->params[$key] = $_POST[$key];
                    }
                    break;
                case 'PUT':
                case 'DELETE':
                    parse_str(file_get_contents('php://input'), $this->params);
                    break;
                default:
                    break;
            }
        }
        
        private function dirCountMatch($realPathList, $pathList){
            return count($realPathList) === count($pathList);
        }
        
        private function dirNameCheck($realDirName, $dirName){
            return $realDirName === $dirName;
        }
        
        public function get($path, $callable){
            if($this->method('get')){
                if ($this->pathMatch($this->path, $path)){
                    $this->params();
                    $callable = $callable->bindTo($this);
                    $callable();
                }
            }
        }
        
        public function post($path, $callable){
            if($this->method('post')){
                if ($this->pathMatch($this->path, $path)){
                    $this->params();
                    $callable = $callable->bindTo($this);
                    $callable();
                }
            }
        }
        
        public function put($path, $callable){
            if($this->method('put')){
                if ($this->pathMatch($this->path, $path)){
                    $this->params();
                    $callable = $callable->bindTo($this);
                    $callable();
                }
            }
        }
        
        public function delete($path, $callable){
            if($this->method('delete')){
                if ($this->pathMatch($this->path, $path)){
                    $callable = $callable->bindTo($this);
                    $callable();
                }
            }
        }
    }