For lulz and testing out crap. :D

httpd.php

<?php

    class httpd
    {
        private $sock = null;
        
        private function http_response($client, $code, $err)
        {
            socket_write($client, "HTTP/1.1 $code $err\r\nContent-type: text/plain\r\n\r\n");
        }

        private function OK($c){$this->http_response($c,200,'OK');}
        private function NO($c){$this->http_response($c,403,'FORBIDDEN');}

        public function __construct($addr, $port)
        {
            $this->sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
            socket_bind($this->sock, $addr, $port) or die('Could not bind to address');
            socket_listen($this->sock);
            
            for(;;)
            {
                $client = socket_accept($this->sock);
                $input = socket_read($client, 1024);

                if (!strstr($input, "\r\n")) $this->NO($client);
                else
                {
                    $data = explode("\r\n", $input);
                    $head = $data[0];

                    if (!stristr($head, ' ')) $this->NO($client);
                    else
                    {
                        $req = explode(' ', $head);

                        if (count($req) != 3) $this->NO($client);
                        else
                        {
                            if (strtoupper($req[0]) != 'GET' || strtoupper($req[2]) != 'HTTP/1.1') $this->NO($client);
                            else
                            {
                                list($host, $port) = array('', 0);
                                socket_getpeername($client, $host, $port);
                                printf('%s:%d requested page: %s'.chr(10), $host, $port, $req[1]);

                                // Do shit
                                $this->OK($client);
                            }
                        }
                    }
                }
                
                socket_close($client);
            }
            socket_close($this->sock);
        }
    }

    new httpd('0.0.0.0', 80);
    
?>