Static pages plugin for WordPress | © 2017 Nick Freear.

wp-static-pages-plugin.php

<?php namespace Nfreear\WP_Plugins;

/**
 * Plugin Name: WP Static Pages
 * Plugin URI:  https://gist.github.com/nfreear
 * Description: For some URI paths, display a static text or HTML file.
 * Author:      Nick Freear
 * Author URI:  https://github.com/nfreear
 * Version:     1.0-alpha
 *
 * @copyright © 2017 Nick Freear.
 * @author    Nick Freear, 01-November-2017.
 *
 * @link  https://github.com/IET-OU/wp-iet-generic-plugins
 * @link  http://headstar.com/eab/issues/2017/oct2017.html
 */

class WP_Static_Pages_Plugin {

    const URI_REGEX = '/^\/(?P<path>20\d{2}\/[a-z]{3})(?P<ext>\.html|\.txt)/';
    // const URI_REGEX = '/^\/(?P<year>20\d{2})\/(?P<month>[a-z]{3})(?P<y2>20\d{2})?(?P<ext>\.html|\.txt)/';

    const PATH = '/path/to/static/{path}{ext}';

    public function __construct() {
		    // add_filter( 'the_content', [ &$this, 'filter_the_content' ] );
		    add_action( 'init', [ &$this, 'init' ] );
	  }

    public function init() {
        $request_uri = filter_input( INPUT_SERVER, 'REQUEST_URI' );

        if ( ! preg_match( self::option( 'wpst_uri_regex', self::URI_REGEX ), $request_uri, $matches )) {
            return;
        }

        $file_ext = $matches[ 'ext' ];

        $subs = [];
        foreach ( $matches as $key => $value ) {
            $subs [ '{' . $key . '}' ] = $value;
        }

        // var_dump( $subs );

        // $file_path = sprintf( self::option( 'y', self::PATH ), $matches[ 'path' ] );
        $file_path = strtr( self::option( 'wpst_path', self::PATH ), $subs );

        $file = file_get_contents( $file_path );

        if ( $file ) {
            if ( $file_ext === '.txt' ) {
                header( 'Content-Type: text/plain; charset=utf-8' );
            }

            echo $file;

            exit;
        }
    }

    protected static function option( $key, $default ) {
        $KEY = strtoupper( $key );
        return defined( $KEY ) ? constant( $KEY ) : $default;
    }
}

$wp_static_pages = new WP_Static_Pages_Plugin();