Routing PHP 5.4+ Built-in Web Server like .htaccess

Question

I have started using the PHP 5.6's built in web server using the following command:

php -S localhost:80

I was using WAMP Server before. And the manual also says that, if you give a router script to the above command, say like:

php -S localhost:80 router.php

We can achieve something like .htaccess. But I couldn't find a reliable tutorial to how to do the redirection or include. Right now, my .htaccess file has this contents:

RewriteEngine On
RewriteRule (.*)-(.*)\.htm$ ./?page=$1&sub=$2&%{QUERY_STRING} 
RewriteRule ^([^/]*)\.htm$ ./?page=$1&%{QUERY_STRING} [L]

What am I supposed to put in the router.php in order to achieve the same output that I had in the Apache Web Server? Thanks in Advance.

Answer 1

<?php
    $_matches = array();

    /**
     * Initialize the rewrite environment.
     */
    function initialize() {
        set_environment($_SERVER['REQUEST_URI']);
    }

    /**
     * Set important environment variables and re-parse the query string.
     * @return boolean
     */
    function finalize() {
        if (defined('REWRITER_FINALIZED')) return false;

        define('REWRITER_FINALIZED', true);

        if (\is_file($_SERVER['DOCUMENT_ROOT'] . $_SERVER['SCRIPT_NAME'])) {
            $_SERVER['SCRIPT_FILENAME'] = $_SERVER['DOCUMENT_ROOT'] . $_SERVER['SCRIPT_NAME'];
        }

        if (isset($_SERVER['QUERY_STRING'])) {
            $_GET = [];
            parse_str($_SERVER['QUERY_STRING'], $_GET);
        }

        $_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];

        return true;
    }

    /**
     * Adjust the server environment variables to match a given URL.
     * @param string $url
     */
    function set_environment($url) {
        $url = rtrim($url, '&?');
        $request_uri = $script_name = $url;
        $query_string = null;

        if (strpos($url, '?') > 0) {
            $script_name = substr($url, 0, strpos($url, '?'));
            $query_string = substr($url, 1 + strpos($url, '?'));
        }

        $_SERVER['REQUEST_URI'] = $request_uri;
        $_SERVER['SCRIPT_NAME'] = $script_name;
        $_SERVER['QUERY_STRING'] = $query_string;
    }

    /**
     * Parse regular expression matches. eg. $0 or $1
     * @param string $url
     * @return string
     */
    function parse_matches($url) {        
        $replace = function($bit) {
            global $matches;
            return isset($matches[$bit[1]])
                ? $matches[$bit[1]]
                : null;
        };

        return preg_replace_callback('/\$([0-9]+)/', $replace, $url);
    }

    /**
     * Parse Apache style rewrite parameters. eg. %{QUERY_STRING}
     * @param string $url
     * @return string
     */
    function parse_parameters($url) {
        $replace = function($bit) {
            return isset($_SERVER[$bit[1]])
                ? $_SERVER[$bit[1]]
                : null;
        };
        return preg_replace_callback('/%\{([A-Z_+]+)\}/', $replace, $url);
    }

    /**
     * Change the internal url to a different url.
     * @param string $from Regular expression to match current url, or optional when used in conjunction with `test`.
     * @param string $to URL to redirect to.
     * @return boolean
     */
    function rewrite($from, $to = null) {
        if (defined('REWRITER_FINALIZED')) return false;

        $url = $_SERVER['SCRIPT_NAME'];

        if (isset($to)) {
            $url = preg_replace($from, $to, $url);
        } else {
            $url = parse_matches($from);
        }

        set_environment(
            parse_parameters($url)
        );

        return true;
    }

    /**
     * Compare a regular expression against the current request, store the matches for later use.
     * @return boolean
     */
    function test($expression) {
        global $matches;
        if (defined('REWRITER_FINALIZED')) return false;
        return 0 < (integer)preg_match($expression, $_SERVER['SCRIPT_NAME'], $matches);
    }

    initialize();

    // Your rewrite rules here.
    test('%/(.*)-(.*)\.htm$%') && rewrite('/?page=$1&sub=$2&%{QUERY_STRING}') && finalize();
    test('%^([^/]*)\.htm$%') && rewrite('/?page=$0&%{QUERY_STRING}') && finalize();

    echo "<pre>";
    var_dump($_SERVER);
    // include index.php or something

I've included a bunch of 'helper' functions which will make it easier to write your rewrite rules (borrowed here).